diff --git a/pkgs/applications/altcoins/clightning.nix b/pkgs/applications/altcoins/clightning.nix
index 73cdd3664ea5..d7e4ee233a86 100644
--- a/pkgs/applications/altcoins/clightning.nix
+++ b/pkgs/applications/altcoins/clightning.nix
@@ -1,5 +1,5 @@
-{ stdenv, fetchpatch, python3, pkgconfig, which, libtool, autoconf, automake,
-  autogen, git, sqlite, gmp, zlib, fetchFromGitHub }:
+{ stdenv, python3, pkgconfig, which, libtool, autoconf, automake,
+  autogen, sqlite, gmp, zlib, fetchFromGitHub }:
 
 with stdenv.lib;
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/altcoins/default.nix b/pkgs/applications/altcoins/default.nix
index 385e9e53522d..9f1763087de2 100644
--- a/pkgs/applications/altcoins/default.nix
+++ b/pkgs/applications/altcoins/default.nix
@@ -88,5 +88,5 @@ rec {
   parity = callPackage ./parity { };
   parity-ui = callPackage ./parity-ui { };
 
-  particl-core = callPackage ./particl/particl-core.nix { boost = boost165; miniupnpc = miniupnpc_2; withGui = false; };
+  particl-core = callPackage ./particl/particl-core.nix { boost = boost165; miniupnpc = miniupnpc_2; };
 }
diff --git a/pkgs/applications/altcoins/dero.nix b/pkgs/applications/altcoins/dero.nix
index dff7bc0b0dc4..8405ea8f842b 100644
--- a/pkgs/applications/altcoins/dero.nix
+++ b/pkgs/applications/altcoins/dero.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, fetchFromGitHub, cmake, pkgconfig, unbound, openssl, boost
-, libunwind, lmdb, miniupnpc, readline }:
+, lmdb, miniupnpc, readline }:
 
 stdenv.mkDerivation rec {
   name = "dero-${version}";
diff --git a/pkgs/applications/altcoins/dogecoin.nix b/pkgs/applications/altcoins/dogecoin.nix
index 33c2e598fca9..0452f4013345 100644
--- a/pkgs/applications/altcoins/dogecoin.nix
+++ b/pkgs/applications/altcoins/dogecoin.nix
@@ -1,7 +1,7 @@
 { stdenv , fetchFromGitHub
 , pkgconfig, autoreconfHook
 , db5, openssl, boost, zlib, miniupnpc
-, glib, protobuf, utillinux, qt4, qrencode
+, protobuf, utillinux, qt4, qrencode
 , withGui }:
 
 with stdenv.lib;
diff --git a/pkgs/applications/altcoins/ethsign/default.nix b/pkgs/applications/altcoins/ethsign/default.nix
index 0659c4fa2585..35fd4bc718c8 100644
--- a/pkgs/applications/altcoins/ethsign/default.nix
+++ b/pkgs/applications/altcoins/ethsign/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildGoPackage, fetchFromGitHub, fetchgit, clang }:
+{ stdenv, buildGoPackage, fetchFromGitHub, fetchgit }:
 
 buildGoPackage rec {
   name = "ethsign-${version}";
diff --git a/pkgs/applications/altcoins/freicoin.nix b/pkgs/applications/altcoins/freicoin.nix
index b753e2d48c97..1e9192bc6e40 100644
--- a/pkgs/applications/altcoins/freicoin.nix
+++ b/pkgs/applications/altcoins/freicoin.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, stdenv, db, boost, gmp, mpfr, miniupnpc, qt4, qmake4Hook, unzip }:
+{ fetchFromGitHub, stdenv, db, boost, gmp, mpfr, qt4, qmake4Hook }:
 
 stdenv.mkDerivation rec {
   version = "0.8.6-2";
diff --git a/pkgs/applications/altcoins/go-ethereum-classic/default.nix b/pkgs/applications/altcoins/go-ethereum-classic/default.nix
index 679312d9a8e9..7461e4c376ab 100644
--- a/pkgs/applications/altcoins/go-ethereum-classic/default.nix
+++ b/pkgs/applications/altcoins/go-ethereum-classic/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "go-ethereum-classic-${version}";
diff --git a/pkgs/applications/altcoins/go-ethereum.nix b/pkgs/applications/altcoins/go-ethereum.nix
index 79c8e0dfde8a..73aa4452c0f0 100644
--- a/pkgs/applications/altcoins/go-ethereum.nix
+++ b/pkgs/applications/altcoins/go-ethereum.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub, libobjc, IOKit }:
+{ stdenv, buildGoPackage, fetchFromGitHub, libobjc, IOKit }:
 
 buildGoPackage rec {
   name = "go-ethereum-${version}";
diff --git a/pkgs/applications/altcoins/hevm.nix b/pkgs/applications/altcoins/hevm.nix
index 1aa598f32545..e7f47d0f2200 100644
--- a/pkgs/applications/altcoins/hevm.nix
+++ b/pkgs/applications/altcoins/hevm.nix
@@ -5,12 +5,12 @@
 , lens-aeson, memory, monad-par, mtl, optparse-generic, process
 , QuickCheck, quickcheck-text, readline, rosezipper, scientific
 , stdenv, tasty, tasty-hunit, tasty-quickcheck, temporary, text
-, text-format, time, unordered-containers, vector, vty
+, text-format, unordered-containers, vector, vty
 
 , restless-git
 
 , fetchFromGitHub, lib, makeWrapper
-, ncurses, zlib, bzip2, solc, coreutils
+, zlib, bzip2, solc, coreutils
 , bash
 }:
 
diff --git a/pkgs/applications/altcoins/mist.nix b/pkgs/applications/altcoins/mist.nix
index cb8d01467a2e..f809b30189f4 100644
--- a/pkgs/applications/altcoins/mist.nix
+++ b/pkgs/applications/altcoins/mist.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, makeWrapper, fetchurl, unzip, atomEnv, makeDesktopItem, buildFHSUserEnv }:
+{ stdenv, makeWrapper, fetchurl, unzip, atomEnv, makeDesktopItem, buildFHSUserEnv }:
 
 let
   version = "0.10.0";
diff --git a/pkgs/applications/altcoins/namecoin.nix b/pkgs/applications/altcoins/namecoin.nix
index f73495811695..9af37ff0bca6 100644
--- a/pkgs/applications/altcoins/namecoin.nix
+++ b/pkgs/applications/altcoins/namecoin.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, openssl, boost, libevent, autoreconfHook, db4, miniupnpc, eject, pkgconfig, qt4, protobuf, libqrencode
+{ stdenv, fetchFromGitHub, openssl, boost, libevent, autoreconfHook, db4, miniupnpc, eject, pkgconfig, qt4, protobuf, libqrencode
 , withGui }:
 
 with stdenv.lib;
diff --git a/pkgs/applications/altcoins/nano-wallet/default.nix b/pkgs/applications/altcoins/nano-wallet/default.nix
index a14a40e9cc75..76ee914bd3d7 100644
--- a/pkgs/applications/altcoins/nano-wallet/default.nix
+++ b/pkgs/applications/altcoins/nano-wallet/default.nix
@@ -1,4 +1,4 @@
-{lib, pkgs, stdenv, fetchFromGitHub, cmake, pkgconfig, boost, libGL, qtbase}:
+{lib, stdenv, fetchFromGitHub, cmake, pkgconfig, boost, libGL, qtbase}:
 
 stdenv.mkDerivation rec {
 
diff --git a/pkgs/applications/altcoins/parity-ui/default.nix b/pkgs/applications/altcoins/parity-ui/default.nix
index b22302d0d39a..8566e6037d6f 100644
--- a/pkgs/applications/altcoins/parity-ui/default.nix
+++ b/pkgs/applications/altcoins/parity-ui/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, pkgs, fetchurl, lib, makeWrapper, nodePackages }:
+{ stdenv, pkgs, fetchurl, makeWrapper, nodePackages }:
 
 let
 
diff --git a/pkgs/applications/altcoins/parity-ui/env.nix b/pkgs/applications/altcoins/parity-ui/env.nix
index a273bf33d100..2fd235ade537 100644
--- a/pkgs/applications/altcoins/parity-ui/env.nix
+++ b/pkgs/applications/altcoins/parity-ui/env.nix
@@ -1,5 +1,5 @@
 { stdenv, lib, zlib, glib, alsaLib, dbus, gtk2, atk, pango, freetype, fontconfig
-, libgnome-keyring3, gdk_pixbuf, gvfs, cairo, cups, expat, libgpgerror, nspr
+, libgnome-keyring3, gdk_pixbuf, cairo, cups, expat, libgpgerror, nspr
 , nss, xorg, libcap, systemd, libnotify, libsecret, gnome3 }:
 
 let
diff --git a/pkgs/applications/altcoins/particl/particl-core.nix b/pkgs/applications/altcoins/particl/particl-core.nix
index 5be2bec6c724..331e169cf3f3 100644
--- a/pkgs/applications/altcoins/particl/particl-core.nix
+++ b/pkgs/applications/altcoins/particl/particl-core.nix
@@ -4,14 +4,11 @@
 , db48
 , fetchurl
 , libevent
-, libtool
 , miniupnpc
 , openssl
 , pkgconfig
-, utillinux
 , zeromq
 , zlib
-, withGui
 , unixtools
 }:
 
diff --git a/pkgs/applications/altcoins/stellar-core.nix b/pkgs/applications/altcoins/stellar-core.nix
index 4a4665291d6e..4c3f9fe0760b 100644
--- a/pkgs/applications/altcoins/stellar-core.nix
+++ b/pkgs/applications/altcoins/stellar-core.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchgit, autoconf, libtool, automake, pkgconfig, git
+{ stdenv, fetchgit, autoconf, libtool, automake, pkgconfig, git
 , bison, flex, postgresql }:
 
 let
diff --git a/pkgs/applications/audio/abcde/default.nix b/pkgs/applications/audio/abcde/default.nix
index e672e6f3bae1..04ee72edc36e 100644
--- a/pkgs/applications/audio/abcde/default.nix
+++ b/pkgs/applications/audio/abcde/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, fetchurl, libcdio-paranoia, cddiscid, wget, bash, which, vorbis-tools, id3v2, eyeD3
-, lame, flac, eject, mkcue, glyr
+{ stdenv, fetchurl, libcdio-paranoia, cddiscid, wget, which, vorbis-tools, id3v2, eyeD3
+, lame, flac, glyr
 , perl, DigestSHA, MusicBrainz, MusicBrainzDiscID
 , makeWrapper }:
 
diff --git a/pkgs/applications/audio/airwave/default.nix b/pkgs/applications/audio/airwave/default.nix
index c37963c77f3e..737e73421c9b 100644
--- a/pkgs/applications/audio/airwave/default.nix
+++ b/pkgs/applications/audio/airwave/default.nix
@@ -1,5 +1,5 @@
 { stdenv, multiStdenv, cmake, fetchFromGitHub, file, libX11, makeWrapper
-, overrideCC, qt5, requireFile, unzip, wine
+, qt5, requireFile, unzip, wine
 }:
 
 let
diff --git a/pkgs/applications/audio/audacity/default.nix b/pkgs/applications/audio/audacity/default.nix
index b0c47972e385..1989fd1400d4 100644
--- a/pkgs/applications/audio/audacity/default.nix
+++ b/pkgs/applications/audio/audacity/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, fetchurl, wxGTK30, pkgconfig, file, gettext, gtk2, glib, zlib, perl, intltool,
-  libogg, libvorbis, libmad, libjack2, lv2, lilv, serd, sord, sratom, suil, alsaLib, libsndfile, soxr, flac, lame,
+{ stdenv, fetchurl, wxGTK30, pkgconfig, file, gettext, gtk2,
+  libvorbis, libmad, libjack2, lv2, lilv, serd, sord, sratom, suil, alsaLib, libsndfile, soxr, flac, lame,
   expat, libid3tag, ffmpeg, soundtouch, /*, portaudio - given up fighting their portaudio.patch */
   autoconf, automake, libtool
   }:
diff --git a/pkgs/applications/audio/banshee/default.nix b/pkgs/applications/audio/banshee/default.nix
index a3ac2b097e95..2479360b88e9 100644
--- a/pkgs/applications/audio/banshee/default.nix
+++ b/pkgs/applications/audio/banshee/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv, lib, fetchurl, intltool, pkgconfig, gstreamer, gst-plugins-base
+{ stdenv, lib, fetchurl, intltool, pkgconfig, gstreamer, gst-plugins-base
 , gst-plugins-good, gst-plugins-bad, gst-plugins-ugly, gst-ffmpeg, glib
 , mono, mono-addins, dbus-sharp-1_0, dbus-sharp-glib-1_0, notify-sharp, gtk-sharp-2_0
 , boo, gdata-sharp, taglib-sharp, sqlite, gnome-sharp, gconf, gtk-sharp-beans, gio-sharp
diff --git a/pkgs/applications/audio/clementine/default.nix b/pkgs/applications/audio/clementine/default.nix
index b80449725765..611828753e46 100644
--- a/pkgs/applications/audio/clementine/default.nix
+++ b/pkgs/applications/audio/clementine/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchurl, fetchpatch, boost, cmake, chromaprint, gettext, gst_all_1, liblastfm
 , qt4, taglib, fftw, glew, qjson, sqlite, libgpod, libplist, usbmuxd, libmtp
 , libpulseaudio, gvfs, libcdio, libechonest, libspotify, pcre, projectm, protobuf
-, qca2, pkgconfig, sparsehash, config, makeWrapper, runCommand, gst_plugins }:
+, qca2, pkgconfig, sparsehash, config, makeWrapper, gst_plugins }:
 
 let
   withIpod = config.clementine.ipod or false;
diff --git a/pkgs/applications/audio/deadbeef/default.nix b/pkgs/applications/audio/deadbeef/default.nix
index 4dced0cfafae..e2fcc3c4626a 100644
--- a/pkgs/applications/audio/deadbeef/default.nix
+++ b/pkgs/applications/audio/deadbeef/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, intltool, pkgconfig, fetchpatch, jansson
+{ stdenv, fetchurl, intltool, pkgconfig, jansson
 # deadbeef can use either gtk2 or gtk3
 , gtk2Support ? false, gtk2 ? null
 , gtk3Support ? true, gtk3 ? null, gsettings-desktop-schemas ? null, wrapGAppsHook ? null
diff --git a/pkgs/applications/audio/deadbeef/wrapper.nix b/pkgs/applications/audio/deadbeef/wrapper.nix
index 5b14302204e7..cd45ef5926b0 100644
--- a/pkgs/applications/audio/deadbeef/wrapper.nix
+++ b/pkgs/applications/audio/deadbeef/wrapper.nix
@@ -1,4 +1,4 @@
-{ stdenv, symlinkJoin, deadbeef, makeWrapper, plugins }:
+{ symlinkJoin, deadbeef, makeWrapper, plugins }:
 
 symlinkJoin {
   name = "deadbeef-with-plugins-${deadbeef.version}";
diff --git a/pkgs/applications/audio/distrho/default.nix b/pkgs/applications/audio/distrho/default.nix
index 5c9211e7f3bb..3aa8aa371e65 100644
--- a/pkgs/applications/audio/distrho/default.nix
+++ b/pkgs/applications/audio/distrho/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, alsaLib, fftwSinglePrec, freetype, libjack2
-, libxslt, lv2, pkgconfig, premake3, xorg, ladspa-sdk }:
+, pkgconfig, premake3, xorg, ladspa-sdk }:
 
 stdenv.mkDerivation rec {
   name = "distrho-ports-unstable-2018-01-01";
diff --git a/pkgs/applications/audio/faust/faust2.nix b/pkgs/applications/audio/faust/faust2.nix
index 961ef7135697..cfb37e5761a7 100644
--- a/pkgs/applications/audio/faust/faust2.nix
+++ b/pkgs/applications/audio/faust/faust2.nix
@@ -3,7 +3,6 @@
 , fetchFromGitHub
 , makeWrapper
 , pkgconfig
-, clang
 , llvm
 , emscripten
 , openssl
diff --git a/pkgs/applications/audio/fmit/default.nix b/pkgs/applications/audio/fmit/default.nix
index f1bdcd8c5242..a61f7dc0a905 100644
--- a/pkgs/applications/audio/fmit/default.nix
+++ b/pkgs/applications/audio/fmit/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fftw, freeglut, libGLU, qtbase, qtmultimedia, qmake
+{ stdenv, fetchFromGitHub, fftw, qtbase, qtmultimedia, qmake
 , alsaSupport ? true, alsaLib ? null
 , jackSupport ? false, libjack2 ? null
 , portaudioSupport ? false, portaudio ? null }:
diff --git a/pkgs/applications/audio/gradio/default.nix b/pkgs/applications/audio/gradio/default.nix
index d111502651ed..ed34c3118c68 100644
--- a/pkgs/applications/audio/gradio/default.nix
+++ b/pkgs/applications/audio/gradio/default.nix
@@ -1,5 +1,4 @@
 { stdenv, fetchFromGitHub, pkgconfig
-, gcc
 , python3
 , gsettings-desktop-schemas
 , desktop-file-utils
diff --git a/pkgs/applications/audio/gtkpod/default.nix b/pkgs/applications/audio/gtkpod/default.nix
index e0e620bd05f9..6546fd7866ea 100644
--- a/pkgs/applications/audio/gtkpod/default.nix
+++ b/pkgs/applications/audio/gtkpod/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, pkgconfig, wrapGAppsHook, intltool, libgpod, curl, flac,
-  gnome3, gtk3, glib, gettext, perl, perlXMLParser, flex, libid3tag,
-  libvorbis, hicolor-icon-theme, gdk_pixbuf }:
+  gnome3, gtk3, gettext, perl, perlXMLParser, flex, libid3tag,
+  libvorbis, gdk_pixbuf }:
 
 stdenv.mkDerivation rec {
   version = "2.1.5";
diff --git a/pkgs/applications/audio/jaaa/default.nix b/pkgs/applications/audio/jaaa/default.nix
index cacbf428caa0..2410106cff03 100644
--- a/pkgs/applications/audio/jaaa/default.nix
+++ b/pkgs/applications/audio/jaaa/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, alsaLib, libclthreads, libclxclient, libX11, libXft, libXrender, fftwFloat, freetype, fontconfig, libjack2, xorg, zita-alsa-pcmi }:
+{ stdenv, fetchurl, alsaLib, libclthreads, libclxclient, libX11, libXft, libXrender, fftwFloat, libjack2, zita-alsa-pcmi }:
 
 stdenv.mkDerivation rec {
   name = "jaaa-${version}";
diff --git a/pkgs/applications/audio/lastfmsubmitd/default.nix b/pkgs/applications/audio/lastfmsubmitd/default.nix
index 2cb90081c68b..e22bca29bc97 100644
--- a/pkgs/applications/audio/lastfmsubmitd/default.nix
+++ b/pkgs/applications/audio/lastfmsubmitd/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pythonPackages }:
+{ fetchurl, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "lastfmsubmitd";
diff --git a/pkgs/applications/audio/magnetophonDSP/VoiceOfFaust/default.nix b/pkgs/applications/audio/magnetophonDSP/VoiceOfFaust/default.nix
index d7cc88905c53..740763889ffd 100644
--- a/pkgs/applications/audio/magnetophonDSP/VoiceOfFaust/default.nix
+++ b/pkgs/applications/audio/magnetophonDSP/VoiceOfFaust/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, pkgs, callPackage, fetchFromGitHub, faust2jack, faust2lv2, helmholtz, mrpeach, puredata-with-plugins }:
+{ stdenv, fetchFromGitHub, faust2jack, faust2lv2, helmholtz, mrpeach, puredata-with-plugins }:
 stdenv.mkDerivation rec {
   name = "VoiceOfFaust-${version}";
   version = "1.1.4";
diff --git a/pkgs/applications/audio/mikmod/default.nix b/pkgs/applications/audio/mikmod/default.nix
index f077afec8b20..343ec8679feb 100644
--- a/pkgs/applications/audio/mikmod/default.nix
+++ b/pkgs/applications/audio/mikmod/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, libmikmod, ncurses, alsaLib }:
+{ stdenv, fetchurl, libmikmod, ncurses }:
 
 stdenv.mkDerivation rec {
   name = "mikmod-3.2.8";
diff --git a/pkgs/applications/audio/mopidy/mopify.nix b/pkgs/applications/audio/mopidy/mopify.nix
index d55e711cf330..b657f69e26ee 100644
--- a/pkgs/applications/audio/mopidy/mopify.nix
+++ b/pkgs/applications/audio/mopidy/mopify.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pythonPackages, mopidy }:
+{ stdenv, pythonPackages, mopidy }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "Mopidy-Mopify";
diff --git a/pkgs/applications/audio/pianobar/default.nix b/pkgs/applications/audio/pianobar/default.nix
index 8e591487111b..e21815574d1e 100644
--- a/pkgs/applications/audio/pianobar/default.nix
+++ b/pkgs/applications/audio/pianobar/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, pkgconfig, libao, readline, json_c, libgcrypt, libav, curl }:
+{ fetchurl, stdenv, pkgconfig, libao, json_c, libgcrypt, libav, curl }:
 
 stdenv.mkDerivation rec {
   name = "pianobar-2016.06.02";
diff --git a/pkgs/applications/audio/picard/default.nix b/pkgs/applications/audio/picard/default.nix
index 26f35f258651..d7e6173da9ad 100644
--- a/pkgs/applications/audio/picard/default.nix
+++ b/pkgs/applications/audio/picard/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, python2Packages, fetchurl, gettext, chromaprint }:
+{ stdenv, python2Packages, fetchurl, gettext }:
 
 let
   pythonPackages = python2Packages;
diff --git a/pkgs/applications/audio/puddletag/default.nix b/pkgs/applications/audio/puddletag/default.nix
index e96b6f1909a5..915d7fcbd98b 100644
--- a/pkgs/applications/audio/puddletag/default.nix
+++ b/pkgs/applications/audio/puddletag/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, python2Packages, makeWrapper, chromaprint }:
+{ stdenv, fetchFromGitHub, python2Packages, chromaprint }:
 
 python2Packages.buildPythonApplication rec {
   pname = "puddletag";
diff --git a/pkgs/applications/audio/puredata/wrapper.nix b/pkgs/applications/audio/puredata/wrapper.nix
index 9c0a48db51cc..80968e2700b4 100644
--- a/pkgs/applications/audio/puredata/wrapper.nix
+++ b/pkgs/applications/audio/puredata/wrapper.nix
@@ -1,4 +1,4 @@
-{ stdenv, symlinkJoin, puredata, makeWrapper, plugins }:
+{ symlinkJoin, puredata, makeWrapper, plugins }:
 
 let
 puredataFlags = map (x: "-path ${x}/") plugins;
diff --git a/pkgs/applications/audio/rkrlv2/default.nix b/pkgs/applications/audio/rkrlv2/default.nix
index 28a69d5a3b76..0ff23102e755 100644
--- a/pkgs/applications/audio/rkrlv2/default.nix
+++ b/pkgs/applications/audio/rkrlv2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, pkgs, fetchFromGitHub,
+{ stdenv, fetchFromGitHub,
 automake, pkgconfig, lv2, fftw, cmake, xorg, libjack2, libsamplerate, libsndfile
 }:
 
diff --git a/pkgs/applications/audio/sonata/default.nix b/pkgs/applications/audio/sonata/default.nix
index a3d418cd4fe4..c5754a199bae 100644
--- a/pkgs/applications/audio/sonata/default.nix
+++ b/pkgs/applications/audio/sonata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pkgconfig, intltool, wrapGAppsHook
+{ stdenv, fetchFromGitHub, pkgconfig, intltool, wrapGAppsHook
 , python3Packages, gnome3, gtk3, gobjectIntrospection}:
 
 let
diff --git a/pkgs/applications/audio/ympd/default.nix b/pkgs/applications/audio/ympd/default.nix
index 2e335e6b10e9..134e5bfb42a0 100644
--- a/pkgs/applications/audio/ympd/default.nix
+++ b/pkgs/applications/audio/ympd/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, cmake, llvmPackages, pkgconfig, mpd_clientlib, openssl }:
+{ stdenv, fetchFromGitHub, cmake, pkgconfig, mpd_clientlib, openssl }:
 
 stdenv.mkDerivation rec {
   name = "ympd-${version}";
diff --git a/pkgs/applications/backup/crashplan/default.nix b/pkgs/applications/backup/crashplan/default.nix
index e840c6eeda0a..2c76891b3f9e 100644
--- a/pkgs/applications/backup/crashplan/default.nix
+++ b/pkgs/applications/backup/crashplan/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, makeWrapper, jre, cpio, gawk, gnugrep, gnused, procps, swt, gtk2, glib, libXtst }:
+{ stdenv, fetchurl, makeWrapper, jre, cpio, gawk, gnugrep, gnused, procps, gtk2, glib, libXtst }:
 
 stdenv.mkDerivation rec {
   version = "4.8.3";
diff --git a/pkgs/applications/display-managers/lightdm/default.nix b/pkgs/applications/display-managers/lightdm/default.nix
index 6ba053499f90..8d3d9c9bfcfd 100644
--- a/pkgs/applications/display-managers/lightdm/default.nix
+++ b/pkgs/applications/display-managers/lightdm/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, pam, pkgconfig, libxcb, glib, libXdmcp, itstool, libxml2
-, intltool, xlibsWrapper, libxklavier, libgcrypt, audit, coreutils
+, intltool, libxklavier, libgcrypt, audit, coreutils
 , qt4 ? null
 , withQt5 ? false, qtbase
 }:
diff --git a/pkgs/applications/display-managers/sddm/default.nix b/pkgs/applications/display-managers/sddm/default.nix
index 27b23bb571fc..5e583049190c 100644
--- a/pkgs/applications/display-managers/sddm/default.nix
+++ b/pkgs/applications/display-managers/sddm/default.nix
@@ -1,5 +1,5 @@
-{ mkDerivation, lib, fetchFromGitHub, fetchpatch
-, cmake, extra-cmake-modules, pkgconfig, libxcb, libpthreadstubs, lndir
+{ mkDerivation, lib, fetchFromGitHub
+, cmake, extra-cmake-modules, pkgconfig, libxcb, libpthreadstubs
 , libXdmcp, libXau, qtbase, qtdeclarative, qttools, pam, systemd
 }:
 
diff --git a/pkgs/applications/editors/android-studio/default.nix b/pkgs/applications/editors/android-studio/default.nix
index b7a23b589db1..bd0c412efa53 100644
--- a/pkgs/applications/editors/android-studio/default.nix
+++ b/pkgs/applications/editors/android-studio/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, makeFontsConf, gnome2 }:
+{ stdenv, callPackage, makeFontsConf, gnome2 }:
 
 let
   mkStudio = opts: callPackage (import ./common.nix opts) {
diff --git a/pkgs/applications/editors/atom/default.nix b/pkgs/applications/editors/atom/default.nix
index 8139640457e3..4078efa6783b 100644
--- a/pkgs/applications/editors/atom/default.nix
+++ b/pkgs/applications/editors/atom/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, pkgs, fetchurl, lib, makeWrapper, gvfs, atomEnv}:
+{ stdenv, pkgs, fetchurl, makeWrapper, gvfs, atomEnv}:
 
 let
   common = pname: {version, sha256}: stdenv.mkDerivation rec {
diff --git a/pkgs/applications/editors/atom/env.nix b/pkgs/applications/editors/atom/env.nix
index f93d4042a622..da78c39324a5 100644
--- a/pkgs/applications/editors/atom/env.nix
+++ b/pkgs/applications/editors/atom/env.nix
@@ -1,5 +1,5 @@
 { stdenv, lib, zlib, glib, alsaLib, dbus, gtk3, atk, pango, freetype, fontconfig
-, libgnome-keyring3, gdk_pixbuf, gvfs, cairo, cups, expat, libgpgerror, nspr
+, libgnome-keyring3, gdk_pixbuf, cairo, cups, expat, libgpgerror, nspr
 , gconf, nss, xorg, libcap, systemd, libnotify, libsecret
 }:
 
diff --git a/pkgs/applications/editors/brackets/default.nix b/pkgs/applications/editors/brackets/default.nix
index 23cb16c0733f..1065564f7b4c 100644
--- a/pkgs/applications/editors/brackets/default.nix
+++ b/pkgs/applications/editors/brackets/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, fetchurl, buildEnv, gtk2, glib, gdk_pixbuf, alsaLib, nss, nspr, gconf
-, cups, libgcrypt_1_5, systemd, makeWrapper, dbus }:
+{ stdenv, fetchurl, gtk2, glib, gdk_pixbuf, alsaLib, nss, nspr, gconf
+, cups, libgcrypt_1_5, systemd, dbus }:
 with stdenv.lib;
 
 let
diff --git a/pkgs/applications/editors/dit/default.nix b/pkgs/applications/editors/dit/default.nix
index 03c3c5d5eec6..33d80a577dbe 100644
--- a/pkgs/applications/editors/dit/default.nix
+++ b/pkgs/applications/editors/dit/default.nix
@@ -1,4 +1,4 @@
-{ lib, fetchurl, stdenv, coreutils, ncurses, lua }:
+{ fetchurl, stdenv, coreutils, ncurses, lua }:
 
 stdenv.mkDerivation rec {
   name = "dit-${version}";
diff --git a/pkgs/applications/editors/eclipse/default.nix b/pkgs/applications/editors/eclipse/default.nix
index a2d246809c9d..c719c7b2da1a 100644
--- a/pkgs/applications/editors/eclipse/default.nix
+++ b/pkgs/applications/editors/eclipse/default.nix
@@ -1,8 +1,8 @@
-{ stdenv, lib, fetchurl, makeDesktopItem, makeWrapper
-, freetype, fontconfig, libX11, libXext, libXrender, zlib
+{ stdenv, fetchurl, makeDesktopItem, makeWrapper
+, freetype, fontconfig, libX11, libXrender, zlib
 , glib, gtk3, libXtst, jdk, gsettings-desktop-schemas
 , webkitgtk ? null  # for internal web browser
-, buildEnv, writeText, runCommand
+, buildEnv, runCommand
 , callPackage
 }:
 
diff --git a/pkgs/applications/editors/emacs-modes/emacs-clang-complete-async/default.nix b/pkgs/applications/editors/emacs-modes/emacs-clang-complete-async/default.nix
index 9585f3278211..66ac9a3d77e6 100644
--- a/pkgs/applications/editors/emacs-modes/emacs-clang-complete-async/default.nix
+++ b/pkgs/applications/editors/emacs-modes/emacs-clang-complete-async/default.nix
@@ -1,4 +1,4 @@
-{ clangStdenv, fetchgit, llvmPackages, clang }:
+{ clangStdenv, fetchgit, llvmPackages }:
 
 clangStdenv.mkDerivation {
   name = "emacs-clang-complete-async-20130218";
diff --git a/pkgs/applications/editors/emacs-modes/filesets-plus/default.nix b/pkgs/applications/editors/emacs-modes/filesets-plus/default.nix
index f09a71ec9df0..ad22faf3dff7 100644
--- a/pkgs/applications/editors/emacs-modes/filesets-plus/default.nix
+++ b/pkgs/applications/editors/emacs-modes/filesets-plus/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, lib, stdenv, melpaBuild }:
+{ fetchurl, melpaBuild }:
 
 melpaBuild {
   pname = "filesets-plus";
diff --git a/pkgs/applications/editors/emacs-modes/font-lock-plus/default.nix b/pkgs/applications/editors/emacs-modes/font-lock-plus/default.nix
index 5362451e06bf..b4ee54f3bd31 100644
--- a/pkgs/applications/editors/emacs-modes/font-lock-plus/default.nix
+++ b/pkgs/applications/editors/emacs-modes/font-lock-plus/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, lib, stdenv, melpaBuild }:
+{ fetchurl, lib, melpaBuild }:
 
 melpaBuild {
   pname = "font-lock-plus";
diff --git a/pkgs/applications/editors/emacs-modes/header2/default.nix b/pkgs/applications/editors/emacs-modes/header2/default.nix
index 7da40425185b..171d8c6b16ae 100644
--- a/pkgs/applications/editors/emacs-modes/header2/default.nix
+++ b/pkgs/applications/editors/emacs-modes/header2/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, lib, stdenv, melpaBuild }:
+{ fetchurl, lib, melpaBuild }:
 
 melpaBuild {
   pname = "header2";
diff --git a/pkgs/applications/editors/emacs-modes/hexrgb/default.nix b/pkgs/applications/editors/emacs-modes/hexrgb/default.nix
index 3144eea702df..8b9ebcd60262 100644
--- a/pkgs/applications/editors/emacs-modes/hexrgb/default.nix
+++ b/pkgs/applications/editors/emacs-modes/hexrgb/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, lib, stdenv, melpaBuild }:
+{ fetchurl, lib, melpaBuild }:
 
 melpaBuild {
   pname = "hexrgb";
diff --git a/pkgs/applications/editors/emacs-modes/lib-requires/default.nix b/pkgs/applications/editors/emacs-modes/lib-requires/default.nix
index 8e5d5ee1929f..84dae10127e9 100644
--- a/pkgs/applications/editors/emacs-modes/lib-requires/default.nix
+++ b/pkgs/applications/editors/emacs-modes/lib-requires/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, lib, stdenv, melpaBuild }:
+{ fetchurl, lib, melpaBuild }:
 
 melpaBuild {
   pname = "lib-requires";
diff --git a/pkgs/applications/editors/emacs-modes/melpa-stable-packages.nix b/pkgs/applications/editors/emacs-modes/melpa-stable-packages.nix
index bf0d50368972..c0febd803cc0 100644
--- a/pkgs/applications/editors/emacs-modes/melpa-stable-packages.nix
+++ b/pkgs/applications/editors/emacs-modes/melpa-stable-packages.nix
@@ -13,7 +13,7 @@ To update the list of packages from MELPA,
 
 */
 
-{ lib, external }:
+{ external }:
 
 self:
 
diff --git a/pkgs/applications/editors/emacs-modes/ocaml/default.nix b/pkgs/applications/editors/emacs-modes/ocaml/default.nix
index 7ed6355f9815..9f8d408dd5a2 100644
--- a/pkgs/applications/editors/emacs-modes/ocaml/default.nix
+++ b/pkgs/applications/editors/emacs-modes/ocaml/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, emacs, ocaml }:
+{ stdenv, emacs, ocaml }:
 
 # this package installs the emacs-mode which
 # resides in the ocaml compiler sources.
diff --git a/pkgs/applications/editors/emacs-modes/org-packages.nix b/pkgs/applications/editors/emacs-modes/org-packages.nix
index 8df45ffb61ee..46b90a52a091 100644
--- a/pkgs/applications/editors/emacs-modes/org-packages.nix
+++ b/pkgs/applications/editors/emacs-modes/org-packages.nix
@@ -11,7 +11,7 @@ To update the list of packages from ELPA,
 
 */
 
-{ fetchurl, lib, stdenv, texinfo }:
+{ }:
 
 self:
 
diff --git a/pkgs/applications/editors/emacs-modes/org/default.nix b/pkgs/applications/editors/emacs-modes/org/default.nix
index 1189fd1d6d15..99ecddcb2648 100644
--- a/pkgs/applications/editors/emacs-modes/org/default.nix
+++ b/pkgs/applications/editors/emacs-modes/org/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, emacs, texinfo, which, texlive }:
+{ fetchurl, stdenv, emacs, texinfo, texlive }:
 
 stdenv.mkDerivation rec {
   name = "org-8.3.3";
diff --git a/pkgs/applications/editors/emacs-modes/thingatpt-plus/default.nix b/pkgs/applications/editors/emacs-modes/thingatpt-plus/default.nix
index d68feaec2939..820919b5321f 100644
--- a/pkgs/applications/editors/emacs-modes/thingatpt-plus/default.nix
+++ b/pkgs/applications/editors/emacs-modes/thingatpt-plus/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, lib, stdenv, melpaBuild }:
+{ fetchurl, lib, melpaBuild }:
 
 melpaBuild {
   pname = "thingatpt-plus";
diff --git a/pkgs/applications/editors/emacs/25.nix b/pkgs/applications/editors/emacs/25.nix
index b659e060e3b4..ee21bbbd9bd9 100644
--- a/pkgs/applications/editors/emacs/25.nix
+++ b/pkgs/applications/editors/emacs/25.nix
@@ -1,7 +1,7 @@
 { stdenv, lib, fetchurl, ncurses, xlibsWrapper, libXaw, libXpm, Xaw3d
 , pkgconfig, gettext, libXft, dbus, libpng, libjpeg, libungif
 , libtiff, librsvg, gconf, libxml2, imagemagick, gnutls, libselinux
-, alsaLib, cairo, acl, gpm, AppKit, CoreWLAN, Kerberos, GSS, ImageIO
+, alsaLib, cairo, acl, gpm, AppKit, GSS, ImageIO
 , withX ? !stdenv.isDarwin
 , withGTK2 ? false, gtk2 ? null
 , withGTK3 ? true, gtk3 ? null, gsettings-desktop-schemas ? null
diff --git a/pkgs/applications/editors/emacs/default.nix b/pkgs/applications/editors/emacs/default.nix
index 67afdb24cd47..01eaac7be5d1 100644
--- a/pkgs/applications/editors/emacs/default.nix
+++ b/pkgs/applications/editors/emacs/default.nix
@@ -1,7 +1,7 @@
 { stdenv, lib, fetchurl, ncurses, xlibsWrapper, libXaw, libXpm, Xaw3d
 , pkgconfig, gettext, libXft, dbus, libpng, libjpeg, libungif
 , libtiff, librsvg, gconf, libxml2, imagemagick, gnutls, libselinux
-, alsaLib, cairo, acl, gpm, AppKit, CoreWLAN, Kerberos, GSS, ImageIO
+, alsaLib, cairo, acl, gpm, AppKit, GSS, ImageIO
 , withX ? !stdenv.isDarwin
 , withGTK2 ? false, gtk2 ? null
 , withGTK3 ? true, gtk3 ? null, gsettings-desktop-schemas ? null
diff --git a/pkgs/applications/editors/jetbrains/common.nix b/pkgs/applications/editors/jetbrains/common.nix
index 7715de153981..f357972c4491 100644
--- a/pkgs/applications/editors/jetbrains/common.nix
+++ b/pkgs/applications/editors/jetbrains/common.nix
@@ -1,5 +1,5 @@
-{ stdenv, fetchurl, makeDesktopItem, makeWrapper, patchelf, p7zip
-, coreutils, gnugrep, which, git, python, unzip, libsecret
+{ stdenv, makeDesktopItem, makeWrapper, patchelf, p7zip
+, coreutils, gnugrep, which, git, unzip, libsecret
 }:
 
 { name, product, version, src, wmClass, jdk, meta } @ attrs:
diff --git a/pkgs/applications/editors/jetbrains/default.nix b/pkgs/applications/editors/jetbrains/default.nix
index 060d1de5e045..2d7ea931dd2a 100644
--- a/pkgs/applications/editors/jetbrains/default.nix
+++ b/pkgs/applications/editors/jetbrains/default.nix
@@ -1,6 +1,6 @@
-{ lib, stdenv, callPackage, fetchurl, makeDesktopItem, makeWrapper, patchelf
-, coreutils, gnugrep, which, git, python, unzip, p7zip
-, androidsdk, jdk, cmake, libxml2, zlib, python3, ncurses
+{ lib, stdenv, callPackage, fetchurl
+, python
+, jdk, cmake, libxml2, zlib, python3, ncurses
 }:
 
 with stdenv.lib;
@@ -10,7 +10,7 @@ let
 
   # Sorted alphabetically
 
-  buildClion = { name, version, src, license, description, wmClass, update-channel }:
+  buildClion = { name, version, src, license, description, wmClass, ... }:
     lib.overrideDerivation (mkJetBrainsProduct rec {
       inherit name version src wmClass jdk;
       product = "CLion";
@@ -66,7 +66,7 @@ let
       '';
     });
 
-  buildDataGrip = { name, version, src, license, description, wmClass, update-channel }:
+  buildDataGrip = { name, version, src, license, description, wmClass, ... }:
     (mkJetBrainsProduct {
       inherit name version src wmClass jdk;
       product = "DataGrip";
@@ -83,7 +83,7 @@ let
       };
     });
 
-  buildGoland = { name, version, src, license, description, wmClass, update-channel }:
+  buildGoland = { name, version, src, license, description, wmClass, ... }:
     lib.overrideDerivation (mkJetBrainsProduct {
       inherit name version src wmClass jdk;
       product = "Goland";
@@ -108,7 +108,7 @@ let
       '';
     });
 
-  buildIdea = { name, version, src, license, description, wmClass, update-channel }:
+  buildIdea = { name, version, src, license, description, wmClass, ... }:
     (mkJetBrainsProduct rec {
       inherit name version src wmClass jdk;
       product = "IDEA";
@@ -125,7 +125,7 @@ let
       };
     });
 
-  buildPhpStorm = { name, version, src, license, description, wmClass, update-channel }:
+  buildPhpStorm = { name, version, src, license, description, wmClass, ... }:
     (mkJetBrainsProduct {
       inherit name version src wmClass jdk;
       product = "PhpStorm";
@@ -142,7 +142,7 @@ let
       };
     });
 
-  buildPycharm = { name, version, src, license, description, wmClass, update-channel }:
+  buildPycharm = { name, version, src, license, description, wmClass, ... }:
     (mkJetBrainsProduct rec {
       inherit name version src wmClass jdk;
       product = "PyCharm";
@@ -169,7 +169,7 @@ let
       propagatedUserEnvPkgs = [ python ];
     };
 
-  buildRider = { name, version, src, license, description, wmClass, update-channel }:
+  buildRider = { name, version, src, license, description, wmClass, ... }:
     lib.overrideDerivation (mkJetBrainsProduct rec {
       inherit name version src wmClass jdk;
       product = "Rider";
@@ -195,7 +195,7 @@ let
       '';
     });
 
-  buildRubyMine = { name, version, src, license, description, wmClass, update-channel }:
+  buildRubyMine = { name, version, src, license, description, wmClass, ... }:
     (mkJetBrainsProduct rec {
       inherit name version src wmClass jdk;
       product = "RubyMine";
@@ -208,7 +208,7 @@ let
       };
     });
 
-  buildWebStorm = { name, version, src, license, description, wmClass, update-channel }:
+  buildWebStorm = { name, version, src, license, description, wmClass, ... }:
     lib.overrideDerivation (mkJetBrainsProduct {
       inherit name version src wmClass jdk;
       product = "WebStorm";
diff --git a/pkgs/applications/editors/jucipp/default.nix b/pkgs/applications/editors/jucipp/default.nix
index 6f5f416f4f5f..08918beb8d59 100644
--- a/pkgs/applications/editors/jucipp/default.nix
+++ b/pkgs/applications/editors/jucipp/default.nix
@@ -1,4 +1,4 @@
-{ config, stdenv, fetchgit, makeWrapper, gnome3, at-spi2-core, libcxx,
+{ stdenv, fetchgit, gnome3, at-spi2-core,
   boost, epoxy, cmake, aspell, llvmPackages, libgit2, pkgconfig, pcre,
   libXdmcp, libxkbcommon, libpthreadstubs, wrapGAppsHook, aspellDicts,
   coreutils, glibc, dbus, openssl, libxml2, gnumake, ctags }:
diff --git a/pkgs/applications/editors/kakoune/default.nix b/pkgs/applications/editors/kakoune/default.nix
index 8ef1e549906e..83598bd7eb17 100644
--- a/pkgs/applications/editors/kakoune/default.nix
+++ b/pkgs/applications/editors/kakoune/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, ncurses, boost, asciidoc, docbook_xsl, libxslt, pkgconfig }:
+{ stdenv, fetchFromGitHub, ncurses, asciidoc, docbook_xsl, libxslt, pkgconfig }:
 
 with stdenv.lib;
 
diff --git a/pkgs/applications/editors/kodestudio/default.nix b/pkgs/applications/editors/kodestudio/default.nix
index b03abc2146aa..4e22e032e357 100644
--- a/pkgs/applications/editors/kodestudio/default.nix
+++ b/pkgs/applications/editors/kodestudio/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, callPackage, fetchurl, makeDesktopItem, makeWrapper
+{ stdenv, lib, fetchurl, makeDesktopItem, makeWrapper
 , # Patchelf dependencies:
   alsaLib, atomEnv, boehmgc, flac, libogg, libvorbis, libXScrnSaver, libGLU_combined
 , openssl, xorg, zlib
diff --git a/pkgs/applications/editors/monodevelop/default.nix b/pkgs/applications/editors/monodevelop/default.nix
index 66112b3498dd..69e102f20775 100644
--- a/pkgs/applications/editors/monodevelop/default.nix
+++ b/pkgs/applications/editors/monodevelop/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchgit, fetchNuGet
+{ stdenv, fetchurl
 , autoconf, automake, pkgconfig, shared-mime-info, intltool
 , glib, mono, gtk-sharp-2_0, gnome2, gnome-sharp, unzip
 , dotnetPackages
diff --git a/pkgs/applications/editors/nano/default.nix b/pkgs/applications/editors/nano/default.nix
index fb0ce43a60e6..96a9cea09c76 100644
--- a/pkgs/applications/editors/nano/default.nix
+++ b/pkgs/applications/editors/nano/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, hostPlatform, fetchurl, fetchFromGitHub
+{ stdenv, fetchurl, fetchFromGitHub
 , ncurses
 , texinfo
 , gettext ? null
diff --git a/pkgs/applications/editors/neovim/default.nix b/pkgs/applications/editors/neovim/default.nix
index f47688b82802..af454d357e95 100644
--- a/pkgs/applications/editors/neovim/default.nix
+++ b/pkgs/applications/editors/neovim/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchFromGitHub, cmake, gettext, libmsgpack, libtermkey, libiconv
-, libtool, libuv, luaPackages, ncurses, perl, pkgconfig
-, unibilium, vimUtils, xsel, gperf, callPackage
+, libuv, luaPackages, ncurses, pkgconfig
+, unibilium, xsel, gperf
 , libvterm-neovim
 , withJemalloc ? true, jemalloc
 }:
diff --git a/pkgs/applications/editors/neovim/wrapper.nix b/pkgs/applications/editors/neovim/wrapper.nix
index f1ec03cb42ee..fa0603255599 100644
--- a/pkgs/applications/editors/neovim/wrapper.nix
+++ b/pkgs/applications/editors/neovim/wrapper.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, makeDesktopItem, makeWrapper
+{ stdenv, lib, makeWrapper
 , vimUtils
 , bundlerEnv, ruby
 , pythonPackages
@@ -10,8 +10,7 @@ neovim:
 
 let
   wrapper = {
-    name ? "neovim"
-    , withPython ? true,  extraPythonPackages ? []
+      withPython ? true,  extraPythonPackages ? []
     , withPython3 ? true,  extraPython3Packages ? []
     , withRuby ? true
     , withPyGUI ? false
diff --git a/pkgs/applications/editors/nvpy/default.nix b/pkgs/applications/editors/nvpy/default.nix
index e806e63cdbf6..567f47520352 100644
--- a/pkgs/applications/editors/nvpy/default.nix
+++ b/pkgs/applications/editors/nvpy/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, fetchurl, tk, python2Packages }:
+{ pkgs, fetchurl, python2Packages }:
 
 let
   pythonPackages = python2Packages;
diff --git a/pkgs/applications/editors/texmacs/darwin.nix b/pkgs/applications/editors/texmacs/darwin.nix
index e319ccf39b1b..dfb2e49e0c8d 100644
--- a/pkgs/applications/editors/texmacs/darwin.nix
+++ b/pkgs/applications/editors/texmacs/darwin.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, makeWrapper,
+{ stdenv, callPackage, fetchurl,
   guile_1_8, qt4, zlib, freetype, CoreFoundation, Cocoa, gettext, libiconv, ghostscript,
   tex ? null,
   aspell ? null,
diff --git a/pkgs/applications/editors/tiled/default.nix b/pkgs/applications/editors/tiled/default.nix
index b23db38e0f45..5f9fa850fe66 100644
--- a/pkgs/applications/editors/tiled/default.nix
+++ b/pkgs/applications/editors/tiled/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, pkgconfig, qmake
-, python, qtbase, qttools, zlib }:
+, python, qtbase, qttools }:
 
 stdenv.mkDerivation rec {
   name = "tiled-${version}";
diff --git a/pkgs/applications/editors/typora/default.nix b/pkgs/applications/editors/typora/default.nix
index 082bc2a2536c..7777ef1f17cc 100644
--- a/pkgs/applications/editors/typora/default.nix
+++ b/pkgs/applications/editors/typora/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, dpkg, lib, glib, dbus, makeWrapper, gnome3, gtk3, atk, cairo, pango
+{ stdenv, fetchurl, dpkg, glib, dbus, makeWrapper, gnome3, gtk3, atk, cairo, pango
 , gdk_pixbuf, freetype, fontconfig, nspr, nss, xorg, alsaLib, cups, expat, udev, wrapGAppsHook }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/editors/vim/macvim.nix b/pkgs/applications/editors/vim/macvim.nix
index b6c03a57b561..c97b17bd9af1 100644
--- a/pkgs/applications/editors/vim/macvim.nix
+++ b/pkgs/applications/editors/vim/macvim.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, ncurses, gettext
-, pkgconfig, cscope, python, ruby, tcl, perl, luajit
+, pkgconfig, python, ruby, tcl, perl, luajit
 , darwin
 }:
 
diff --git a/pkgs/applications/editors/vscode/default.nix b/pkgs/applications/editors/vscode/default.nix
index cf58d5d21908..3e815642c178 100644
--- a/pkgs/applications/editors/vscode/default.nix
+++ b/pkgs/applications/editors/vscode/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, callPackage, fetchurl, unzip, atomEnv, makeDesktopItem,
+{ stdenv, lib, fetchurl, unzip, atomEnv, makeDesktopItem,
   gtk2, makeWrapper, libXScrnSaver, libxkbfile, libsecret }:
 
 let
diff --git a/pkgs/applications/editors/vscode/with-extensions.nix b/pkgs/applications/editors/vscode/with-extensions.nix
index 9b0d69ae65aa..5535d9ab1128 100644
--- a/pkgs/applications/editors/vscode/with-extensions.nix
+++ b/pkgs/applications/editors/vscode/with-extensions.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, runCommand, buildEnv, vscode, which, writeScript
+{ stdenv, lib, runCommand, buildEnv, vscode, which, writeScript
 , vscodeExtensions ? [] }:
 
 /*
diff --git a/pkgs/applications/editors/wxhexeditor/default.nix b/pkgs/applications/editors/wxhexeditor/default.nix
index 5597bf0d0b3c..c345e8a95d55 100644
--- a/pkgs/applications/editors/wxhexeditor/default.nix
+++ b/pkgs/applications/editors/wxhexeditor/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, wxGTK, autoconf, automake, libtool, python, gettext, bash }:
+{ stdenv, fetchFromGitHub, fetchpatch, wxGTK, autoconf, automake, libtool, python, gettext }:
 
 stdenv.mkDerivation rec {
   name = "wxHexEditor-${version}";
diff --git a/pkgs/applications/gis/qgis/default.nix b/pkgs/applications/gis/qgis/default.nix
index 02e874739efe..c2ead5a19141 100644
--- a/pkgs/applications/gis/qgis/default.nix
+++ b/pkgs/applications/gis/qgis/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, gdal, cmake, qt4, flex, bison, proj, geos, xlibsWrapper, sqlite, gsl
+{ stdenv, fetchurl, gdal, cmake, qt4, flex, bison, proj, geos, xlibsWrapper, sqlite, gsl
 , qwt, fcgi, python2Packages, libspatialindex, libspatialite, qscintilla, postgresql, makeWrapper
 , qjson, qca2, txt2tags, openssl, darwin, pkgconfig
 , withGrass ? true, grass, IOKit, ApplicationServices
diff --git a/pkgs/applications/graphics/ImageMagick/7.0.nix b/pkgs/applications/graphics/ImageMagick/7.0.nix
index 63cf950f02a4..86aafa9697df 100644
--- a/pkgs/applications/graphics/ImageMagick/7.0.nix
+++ b/pkgs/applications/graphics/ImageMagick/7.0.nix
@@ -1,8 +1,8 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, pkgconfig, libtool
+{ lib, stdenv, fetchFromGitHub, pkgconfig, libtool
 , bzip2, zlib, libX11, libXext, libXt, fontconfig, freetype, ghostscript, libjpeg
 , lcms2, openexr, libpng, librsvg, libtiff, libxml2, openjpeg, libwebp, libheif
 , ApplicationServices
-, buildPlatform, hostPlatform
+, hostPlatform
 }:
 
 let
diff --git a/pkgs/applications/graphics/ImageMagick/default.nix b/pkgs/applications/graphics/ImageMagick/default.nix
index b767f11da00b..94a4aeaa9337 100644
--- a/pkgs/applications/graphics/ImageMagick/default.nix
+++ b/pkgs/applications/graphics/ImageMagick/default.nix
@@ -2,7 +2,7 @@
 , bzip2, zlib, libX11, libXext, libXt, fontconfig, freetype, ghostscript, libjpeg
 , lcms2, openexr, libpng, librsvg, libtiff, libxml2, openjpeg, libwebp, fftw, libheif, libde265
 , ApplicationServices
-, buildPlatform, hostPlatform
+, hostPlatform
 }:
 
 let
diff --git a/pkgs/applications/graphics/ahoviewer/default.nix b/pkgs/applications/graphics/ahoviewer/default.nix
index 5fb7e0078065..532645803808 100644
--- a/pkgs/applications/graphics/ahoviewer/default.nix
+++ b/pkgs/applications/graphics/ahoviewer/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, pkgs, fetchurl, fetchFromGitHub, pkgconfig, libconfig,
+{ stdenv, fetchFromGitHub, pkgconfig, libconfig,
   gtkmm2, glibmm, libxml2, libsecret, curl, libzip,
   librsvg, gst_all_1, autoreconfHook, makeWrapper,
   useUnrar ? false, unrar
diff --git a/pkgs/applications/graphics/avocode/default.nix b/pkgs/applications/graphics/avocode/default.nix
index fbf6443b91f8..d427b2586c00 100644
--- a/pkgs/applications/graphics/avocode/default.nix
+++ b/pkgs/applications/graphics/avocode/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, makeDesktopItem, fetchurl, unzip
+{ stdenv, makeDesktopItem, fetchurl, unzip
 , gdk_pixbuf, glib, gtk2, atk, pango, cairo, freetype, fontconfig, dbus, nss, nspr, alsaLib, cups, expat, udev, gnome2
 , xorg, mozjpeg
 }:
diff --git a/pkgs/applications/graphics/awesomebump/default.nix b/pkgs/applications/graphics/awesomebump/default.nix
index f7a813f36061..df742645e86b 100644
--- a/pkgs/applications/graphics/awesomebump/default.nix
+++ b/pkgs/applications/graphics/awesomebump/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, qtbase, qmake, makeWrapper, qtscript, gcc, flex, bison, qtdeclarative, gnutar }:
+{ lib, stdenv, fetchgit, qtbase, qmake, makeWrapper, qtscript, flex, bison, qtdeclarative }:
 
 
 let
diff --git a/pkgs/applications/graphics/digikam/default.nix b/pkgs/applications/graphics/digikam/default.nix
index 5c6a4bab9306..a31bbe8caeb6 100644
--- a/pkgs/applications/graphics/digikam/default.nix
+++ b/pkgs/applications/graphics/digikam/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, fetchFromGitHub, cmake, doxygen, extra-cmake-modules, wrapGAppsHook, fetchpatch
+{ mkDerivation, lib, fetchFromGitHub, cmake, doxygen, extra-cmake-modules, wrapGAppsHook
 
 # For `digitaglinktree`
 , perl, sqlite
@@ -35,7 +35,6 @@
 , libusb1
 , marble
 , libGLU_combined
-, mysql
 , opencv3
 , pcre
 , threadweaver
diff --git a/pkgs/applications/graphics/dosage/default.nix b/pkgs/applications/graphics/dosage/default.nix
index 7667b674fcec..69d09cd429c1 100644
--- a/pkgs/applications/graphics/dosage/default.nix
+++ b/pkgs/applications/graphics/dosage/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, pythonPackages, fetchFromGitHub }:
+{ pythonPackages, fetchFromGitHub }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "dosage";
diff --git a/pkgs/applications/graphics/epeg/default.nix b/pkgs/applications/graphics/epeg/default.nix
index 02528a43e31b..ef694dec6527 100644
--- a/pkgs/applications/graphics/epeg/default.nix
+++ b/pkgs/applications/graphics/epeg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pkgconfig, libtool, autoconf, automake
+{ stdenv, fetchFromGitHub, pkgconfig, libtool, autoconf, automake
 , libjpeg, libexif
 }:
 
diff --git a/pkgs/applications/graphics/fstl/default.nix b/pkgs/applications/graphics/fstl/default.nix
index 355acf7681a0..b1437508a509 100644
--- a/pkgs/applications/graphics/fstl/default.nix
+++ b/pkgs/applications/graphics/fstl/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchFromGitHub, qtbase, mesa_glu, qmake}:
+{stdenv, fetchFromGitHub, qtbase, mesa_glu}:
 stdenv.mkDerivation rec {
   name = "fstl-${version}";
   version = "0.9.3";
diff --git a/pkgs/applications/graphics/glabels/default.nix b/pkgs/applications/graphics/glabels/default.nix
index 2d4fa882dd61..b4715902df1f 100644
--- a/pkgs/applications/graphics/glabels/default.nix
+++ b/pkgs/applications/graphics/glabels/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, barcode, gnome3, autoreconfHook
 , gtk3, gtk-doc, libxml2, librsvg , libtool, libe-book
-, intltool, itstool, makeWrapper, pkgconfig, which
+, intltool, itstool, makeWrapper, pkgconfig
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/graphics/goxel/default.nix b/pkgs/applications/graphics/goxel/default.nix
index 3d49452cbe62..99230eb23e32 100644
--- a/pkgs/applications/graphics/goxel/default.nix
+++ b/pkgs/applications/graphics/goxel/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, scons, pkgconfig, wrapGAppsHook
+{ stdenv, fetchFromGitHub, scons, pkgconfig, wrapGAppsHook
 , glfw3, gtk3, libpng12 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/graphics/graphicsmagick/default.nix b/pkgs/applications/graphics/graphicsmagick/default.nix
index 2c322128c386..ee58e9831e9a 100644
--- a/pkgs/applications/graphics/graphicsmagick/default.nix
+++ b/pkgs/applications/graphics/graphicsmagick/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, bzip2, freetype, graphviz, ghostscript
+{ stdenv, fetchurl, bzip2, freetype, graphviz, ghostscript
 , libjpeg, libpng, libtiff, libxml2, zlib, libtool, xz, libX11
 , libwebp, quantumdepth ? 8, fixDarwinDylibNames }:
 
diff --git a/pkgs/applications/graphics/inkscape/default.nix b/pkgs/applications/graphics/inkscape/default.nix
index 639f1928f8a4..a82f13ee409a 100644
--- a/pkgs/applications/graphics/inkscape/default.nix
+++ b/pkgs/applications/graphics/inkscape/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, pkgconfig, perl, perlXMLParser, libXft
+{ stdenv, fetchurl, pkgconfig, perl, perlXMLParser, libXft
 , libpng, zlib, popt, boehmgc, libxml2, libxslt, glib, gtkmm2
 , glibmm, libsigcxx, lcms, boost, gettext, makeWrapper
 , gsl, python2, poppler, imagemagick, libwpg, librevenge
diff --git a/pkgs/applications/graphics/k3d/default.nix b/pkgs/applications/graphics/k3d/default.nix
index 996d495d87c1..3555c2b477ff 100644
--- a/pkgs/applications/graphics/k3d/default.nix
+++ b/pkgs/applications/graphics/k3d/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, unzip, ftgl, glew, asciidoc
+{ stdenv, fetchFromGitHub, fetchpatch, ftgl, glew, asciidoc
 , cmake, ninja, libGLU_combined, zlib, python, expat, libxml2, libsigcxx, libuuid, freetype
 , libpng, boost, doxygen, cairomm, pkgconfig, imagemagick, libjpeg, libtiff
 , gettext, intltool, perl, gtkmm2, glibmm, gtkglext, pangox_compat, libXmu }:
diff --git a/pkgs/applications/graphics/kgraphviewer/default.nix b/pkgs/applications/graphics/kgraphviewer/default.nix
index 8f043816ba06..0d898df14b3f 100644
--- a/pkgs/applications/graphics/kgraphviewer/default.nix
+++ b/pkgs/applications/graphics/kgraphviewer/default.nix
@@ -1,5 +1,5 @@
 { stdenv, mkDerivation, fetchurl, cmake, extra-cmake-modules, pkgconfig, wrapGAppsHook
-, kconfig, kcrash, kinit, kdoctools, kiconthemes, kio, kparts, kwidgetsaddons
+, kconfig, kinit, kdoctools, kio, kparts, kwidgetsaddons
 , qtbase, qtsvg
 , boost, graphviz
 }:
diff --git a/pkgs/applications/graphics/krita/default.nix b/pkgs/applications/graphics/krita/default.nix
index 1fd19162a4f7..ec92638f8559 100644
--- a/pkgs/applications/graphics/krita/default.nix
+++ b/pkgs/applications/graphics/krita/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, fetchurl, fetchpatch, cmake, extra-cmake-modules
+{ mkDerivation, lib, fetchurl, cmake, extra-cmake-modules
 , karchive, kconfig, kwidgetsaddons, kcompletion, kcoreaddons
 , kguiaddons, ki18n, kitemmodels, kitemviews, kwindowsystem
 , kio, kcrash
diff --git a/pkgs/applications/graphics/nomacs/default.nix b/pkgs/applications/graphics/nomacs/default.nix
index 1103c9ff40a9..50862a4583b4 100644
--- a/pkgs/applications/graphics/nomacs/default.nix
+++ b/pkgs/applications/graphics/nomacs/default.nix
@@ -1,7 +1,6 @@
 { stdenv
 , fetchFromGitHub
 , cmake
-, makeWrapper
 , pkgconfig
 , wrapGAppsHook
 , gsettings-desktop-schemas
diff --git a/pkgs/applications/graphics/openscad/default.nix b/pkgs/applications/graphics/openscad/default.nix
index 9ab5288700cc..44855d5c8b49 100644
--- a/pkgs/applications/graphics/openscad/default.nix
+++ b/pkgs/applications/graphics/openscad/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub, qt5, libsForQt5
+{ stdenv, fetchFromGitHub, qt5, libsForQt5
 , bison, flex, eigen, boost, libGLU_combined, glew, opencsg, cgal
 , mpfr, gmp, glib, pkgconfig, harfbuzz, gettext
 }:
diff --git a/pkgs/applications/graphics/processing3/default.nix b/pkgs/applications/graphics/processing3/default.nix
index 803257d93929..6916ef4ad7aa 100644
--- a/pkgs/applications/graphics/processing3/default.nix
+++ b/pkgs/applications/graphics/processing3/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchFromGitHub, fetchurl, xmlstarlet, makeWrapper, ant, jdk, rsync, javaPackages, libXxf86vm, gsettings-desktop-schemas }:
+{ stdenv, fetchFromGitHub, fetchurl, xmlstarlet, makeWrapper, ant, jdk, rsync, javaPackages, libXxf86vm, gsettings-desktop-schemas }:
 
 stdenv.mkDerivation rec {
   version = "3.3.7";
diff --git a/pkgs/applications/graphics/sane/backends/generic.nix b/pkgs/applications/graphics/sane/backends/generic.nix
index 2ca1fead84c8..0f47c82f0325 100644
--- a/pkgs/applications/graphics/sane/backends/generic.nix
+++ b/pkgs/applications/graphics/sane/backends/generic.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl
+{ stdenv
 , avahi, libjpeg, libusb1, libv4l, net_snmp, libpng
 , gettext, pkgconfig
 
diff --git a/pkgs/applications/graphics/scantailor/advanced.nix b/pkgs/applications/graphics/scantailor/advanced.nix
index 29e53683d1c2..d55441e39fa5 100644
--- a/pkgs/applications/graphics/scantailor/advanced.nix
+++ b/pkgs/applications/graphics/scantailor/advanced.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, makeDesktopItem
+{ stdenv, fetchFromGitHub
 , cmake, libjpeg, libpng, libtiff, boost
 , qtbase, qttools }:
 
diff --git a/pkgs/applications/graphics/screencloud/default.nix b/pkgs/applications/graphics/screencloud/default.nix
index cffe485711f6..292ae9c8faa8 100644
--- a/pkgs/applications/graphics/screencloud/default.nix
+++ b/pkgs/applications/graphics/screencloud/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub, cmake, qt4, quazip, qt-mobility, qxt, pythonPackages, glib }:
+{ stdenv, fetchFromGitHub, cmake, qt4, quazip, qt-mobility, qxt, pythonPackages }:
 
 with stdenv.lib;
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/graphics/shutter/default.nix b/pkgs/applications/graphics/shutter/default.nix
index 3bc814e1e758..1f41253b6994 100644
--- a/pkgs/applications/graphics/shutter/default.nix
+++ b/pkgs/applications/graphics/shutter/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, perl, perlPackages, makeWrapper, imagemagick, gdk_pixbuf, librsvg
+{ stdenv, fetchurl, perl, perlPackages, makeWrapper, imagemagick, gdk_pixbuf, librsvg
 , hicolor-icon-theme
 }:
 
diff --git a/pkgs/applications/graphics/synfigstudio/default.nix b/pkgs/applications/graphics/synfigstudio/default.nix
index 930a7e686f8f..63d35cc54531 100644
--- a/pkgs/applications/graphics/synfigstudio/default.nix
+++ b/pkgs/applications/graphics/synfigstudio/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, fetchFromGitHub, boost, cairo, fontsConf, gettext, glibmm, gtk3, gtkmm3
-, libjack2, libsigcxx, libtool, libxmlxx, makeWrapper, mlt-qt5, pango, pkgconfig
+{ stdenv, fetchFromGitHub, boost, cairo, gettext, glibmm, gtk3, gtkmm3
+, libjack2, libsigcxx, libxmlxx, makeWrapper, mlt-qt5, pango, pkgconfig
 , imagemagick, intltool, autoreconfHook, which, defaultIconTheme
 }:
 
diff --git a/pkgs/applications/graphics/write_stylus/default.nix b/pkgs/applications/graphics/write_stylus/default.nix
index a1c39fadb59d..231a9799b59f 100644
--- a/pkgs/applications/graphics/write_stylus/default.nix
+++ b/pkgs/applications/graphics/write_stylus/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, qtbase, qtsvg,  makeWrapper, fetchurl, makeDesktopItem }:
+{ stdenv, lib, qtbase, qtsvg,  fetchurl, makeDesktopItem }:
 stdenv.mkDerivation rec {
   name = "write_stylus-${version}";
   version = "209";
diff --git a/pkgs/applications/graphics/yed/default.nix b/pkgs/applications/graphics/yed/default.nix
index a8b4038b11f3..aa2435c43de6 100644
--- a/pkgs/applications/graphics/yed/default.nix
+++ b/pkgs/applications/graphics/yed/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, requireFile, makeWrapper, unzip, jre }:
+{ stdenv, requireFile, makeWrapper, unzip, jre }:
 
 stdenv.mkDerivation rec {
   name = "yEd-${version}";
diff --git a/pkgs/applications/inferno/default.nix b/pkgs/applications/inferno/default.nix
index 3f3c2a32e68e..de9be76b6e45 100644
--- a/pkgs/applications/inferno/default.nix
+++ b/pkgs/applications/inferno/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, fetchhg, stdenv, xorg, makeWrapper }:
+{ fetchhg, stdenv, xorg, makeWrapper }:
 
 stdenv.mkDerivation rec {
   # Inferno is a rolling release from a mercurial repository. For the verison number
diff --git a/pkgs/applications/kde/ark/default.nix b/pkgs/applications/kde/ark/default.nix
index fb631414838c..598857f2e70d 100644
--- a/pkgs/applications/kde/ark/default.nix
+++ b/pkgs/applications/kde/ark/default.nix
@@ -1,5 +1,5 @@
 {
-  mkDerivation, lib, config, makeWrapper,
+  mkDerivation, lib, makeWrapper,
 
   extra-cmake-modules, kdoctools,
 
diff --git a/pkgs/applications/kde/default.nix b/pkgs/applications/kde/default.nix
index 8f64c8849311..d839a7141e3b 100644
--- a/pkgs/applications/kde/default.nix
+++ b/pkgs/applications/kde/default.nix
@@ -26,8 +26,7 @@ still shows most of the available features is in `./gwenview.nix`.
 */
 
 {
-  stdenv, lib, libsForQt5, fetchurl, recurseIntoAttrs,
-  plasma5, attica, phonon,
+  lib, libsForQt5, fetchurl,
   okteta
 }:
 
diff --git a/pkgs/applications/kde/dolphin.nix b/pkgs/applications/kde/dolphin.nix
index 2570e37bf2c9..6a4635c26fb3 100644
--- a/pkgs/applications/kde/dolphin.nix
+++ b/pkgs/applications/kde/dolphin.nix
@@ -1,10 +1,10 @@
 {
   mkDerivation, lib,
   extra-cmake-modules, kdoctools,
-  baloo, baloo-widgets, dolphin-plugins, kactivities, kbookmarks, kcmutils,
+  baloo, baloo-widgets, kactivities, kbookmarks, kcmutils,
   kcompletion, kconfig, kcoreaddons, kdelibs4support, kdbusaddons,
   kfilemetadata, ki18n, kiconthemes, kinit, kio, knewstuff, knotifications,
-  konsole, kparts, ktexteditor, kwindowsystem, phonon, solid
+  kparts, ktexteditor, kwindowsystem, phonon, solid
 }:
 
 mkDerivation {
diff --git a/pkgs/applications/kde/kdenlive.nix b/pkgs/applications/kde/kdenlive.nix
index 65080ba7f066..9da12b248c56 100644
--- a/pkgs/applications/kde/kdenlive.nix
+++ b/pkgs/applications/kde/kdenlive.nix
@@ -2,18 +2,13 @@
 , lib
 , extra-cmake-modules
 , kdoctools
-, kactivities
 , kconfig
 , kcrash
 , kguiaddons
 , kiconthemes
 , ki18n
 , kinit
-, kio
-, kio-extras
-, kwindowsystem
 , kdbusaddons
-, plasma-framework
 , knotifications
 , knewstuff
 , karchive
diff --git a/pkgs/applications/kde/libkomparediff2.nix b/pkgs/applications/kde/libkomparediff2.nix
index 52aa2b10e241..cae2aec5668d 100644
--- a/pkgs/applications/kde/libkomparediff2.nix
+++ b/pkgs/applications/kde/libkomparediff2.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, extra-cmake-modules, ki18n, kxmlgui, kcodecs, kio }:
+{ mkDerivation, extra-cmake-modules, ki18n, kxmlgui, kcodecs, kio }:
 
 mkDerivation {
   name = "libkomparediff2";
diff --git a/pkgs/applications/kde/pim-data-exporter.nix b/pkgs/applications/kde/pim-data-exporter.nix
index 10123944e3a6..d17ffb3c0444 100644
--- a/pkgs/applications/kde/pim-data-exporter.nix
+++ b/pkgs/applications/kde/pim-data-exporter.nix
@@ -4,7 +4,7 @@
   akonadi, kcmutils, kcrash, kdbusaddons, kidentitymanagement, kldap,
   kmailtransport, knewstuff, knotifications, knotifyconfig, kparts, kross, ktexteditor,
   kwallet, libkdepim, libkleo, pimcommon, qttools,
-  karchive, mailcommon, messagelib, pim-data-exporter
+  karchive, mailcommon, messagelib
 }:
 
 mkDerivation {
diff --git a/pkgs/applications/kde/pimcommon.nix b/pkgs/applications/kde/pimcommon.nix
index 02e9a47274b4..bbbcca13d980 100644
--- a/pkgs/applications/kde/pimcommon.nix
+++ b/pkgs/applications/kde/pimcommon.nix
@@ -2,7 +2,7 @@
   mkDerivation, lib, kdepimTeam,
   extra-cmake-modules, kdoctools,
   akonadi, akonadi-contacts, akonadi-mime, grantlee, karchive, kcodecs,
-  kcompletion, kconfig, kconfigwidgets, kcontacts, kdbusaddons, kdesignerplugin,
+  kcompletion, kconfig, kconfigwidgets, kcontacts, kdbusaddons,
   kiconthemes, kimap, kio, kitemmodels, kjobwidgets, knewstuff, kpimtextedit,
   kwallet, kwindowsystem, libkdepim, qtwebengine
 }:
diff --git a/pkgs/applications/misc/acbuild/default.nix b/pkgs/applications/misc/acbuild/default.nix
index 319764ae81a5..c1b8a7eb8663 100644
--- a/pkgs/applications/misc/acbuild/default.nix
+++ b/pkgs/applications/misc/acbuild/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, go, fetchFromGitHub }:
+{ stdenv, go, fetchFromGitHub }:
 
 stdenv.mkDerivation rec {
   name = "acbuild-${version}";
diff --git a/pkgs/applications/misc/alacritty/default.nix b/pkgs/applications/misc/alacritty/default.nix
index 698485fb086f..09da61f34641 100644
--- a/pkgs/applications/misc/alacritty/default.nix
+++ b/pkgs/applications/misc/alacritty/default.nix
@@ -9,7 +9,6 @@
   freetype,
   fontconfig,
   libX11,
-  gperf,
   libXcursor,
   libXxf86vm,
   libXi,
diff --git a/pkgs/applications/misc/bashSnippets/default.nix b/pkgs/applications/misc/bashSnippets/default.nix
index acd5ae7dd73d..fc5fa4d03006 100644
--- a/pkgs/applications/misc/bashSnippets/default.nix
+++ b/pkgs/applications/misc/bashSnippets/default.nix
@@ -1,5 +1,5 @@
 { stdenv, lib, fetchFromGitHub, makeWrapper
-, curl, netcat, python, bind, iproute, bc, gitMinimal }:
+, curl, python, bind, iproute, bc, gitMinimal }:
 let
   version = "1.17.3";
   deps = lib.makeBinPath [
diff --git a/pkgs/applications/misc/calibre/default.nix b/pkgs/applications/misc/calibre/default.nix
index 1aabbb587eb5..8e553af52505 100644
--- a/pkgs/applications/misc/calibre/default.nix
+++ b/pkgs/applications/misc/calibre/default.nix
@@ -1,6 +1,6 @@
-{ stdenv, fetchurl, fetchpatch, poppler_utils, pkgconfig, libpng
+{ stdenv, fetchurl, poppler_utils, pkgconfig, libpng
 , imagemagick, libjpeg, fontconfig, podofo, qtbase, qmake, icu, sqlite
-, makeWrapper, unrarSupport ? false, chmlib, python2Packages, xz, libusb1, libmtp
+, makeWrapper, unrarSupport ? false, chmlib, python2Packages, libusb1, libmtp
 , xdg_utils, makeDesktopItem, wrapGAppsHook
 }:
 
diff --git a/pkgs/applications/misc/cataract/default.nix b/pkgs/applications/misc/cataract/default.nix
index 83292a76c5dd..3a9f20289227 100644
--- a/pkgs/applications/misc/cataract/default.nix
+++ b/pkgs/applications/misc/cataract/default.nix
@@ -1,13 +1,4 @@
-{ callPackage
-, stdenv
-, fetchgit
-, autoconf
-, automake
-, glib
-, pkgconfig
-, libxml2
-, exiv2
-, imagemagick }:
+{ callPackage }:
 
 callPackage ./build.nix {
   version = "1.1.0";
diff --git a/pkgs/applications/misc/cataract/unstable.nix b/pkgs/applications/misc/cataract/unstable.nix
index 8d8b063e48b3..397aed355a95 100644
--- a/pkgs/applications/misc/cataract/unstable.nix
+++ b/pkgs/applications/misc/cataract/unstable.nix
@@ -1,13 +1,4 @@
-{ callPackage
-, stdenv
-, fetchgit
-, autoconf
-, automake
-, glib
-, pkgconfig
-, libxml2
-, exiv2
-, imagemagick }:
+{ callPackage }:
 
 callPackage ./build.nix {
   version = "unstable-2016-10-18";
diff --git a/pkgs/applications/misc/cherrytree/default.nix b/pkgs/applications/misc/cherrytree/default.nix
index 03709c30373d..6bd1cef7c1b2 100644
--- a/pkgs/applications/misc/cherrytree/default.nix
+++ b/pkgs/applications/misc/cherrytree/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pythonPackages, gettext, sqlite }:
+{ stdenv, fetchurl, pythonPackages, gettext }:
 
 with stdenv.lib;
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/misc/chirp/default.nix b/pkgs/applications/misc/chirp/default.nix
index 6e0152c71ed0..8c57ebead6ae 100644
--- a/pkgs/applications/misc/chirp/default.nix
+++ b/pkgs/applications/misc/chirp/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, libxml2Python, libxslt, makeWrapper
-, python, pyserial, pygtk }:
+, pyserial, pygtk }:
 
 stdenv.mkDerivation rec {
   name = "chirp-daily-${version}";
diff --git a/pkgs/applications/misc/dbvisualizer/default.nix b/pkgs/applications/misc/dbvisualizer/default.nix
index 7aa19ffb3017..fbeb965df380 100644
--- a/pkgs/applications/misc/dbvisualizer/default.nix
+++ b/pkgs/applications/misc/dbvisualizer/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, jre, coreutils, makeWrapper }:
+{ stdenv, fetchurl, jre, makeWrapper }:
 
 stdenv.mkDerivation {
   name = "dbvisualizer-9.5.7";
diff --git a/pkgs/applications/misc/dfilemanager/default.nix b/pkgs/applications/misc/dfilemanager/default.nix
index 53344595f783..6cbdc8ece0ca 100644
--- a/pkgs/applications/misc/dfilemanager/default.nix
+++ b/pkgs/applications/misc/dfilemanager/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchgit, cmake, file, qtbase, qttools, qtx11extras, solid }:
+{ stdenv, fetchgit, cmake, file, qtbase, qttools, solid }:
 
 let
   version = "git-2016-01-10";
diff --git a/pkgs/applications/misc/electron-cash/default.nix b/pkgs/applications/misc/electron-cash/default.nix
index 76b61de56088..891222a0f10e 100644
--- a/pkgs/applications/misc/electron-cash/default.nix
+++ b/pkgs/applications/misc/electron-cash/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, python3Packages, qtbase }:
+{ stdenv, fetchurl, python3Packages }:
 
 let
 
diff --git a/pkgs/applications/misc/electrum/default.nix b/pkgs/applications/misc/electrum/default.nix
index 383f73b62994..ed2f0626e5d2 100644
--- a/pkgs/applications/misc/electrum/default.nix
+++ b/pkgs/applications/misc/electrum/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, python3, python3Packages, zbar, fetchpatch }:
+{ stdenv, fetchurl, python3, python3Packages, zbar }:
 
 python3Packages.buildPythonApplication rec {
   name = "electrum-${version}";
diff --git a/pkgs/applications/misc/evtest/default.nix b/pkgs/applications/misc/evtest/default.nix
index 73911bab6f66..3d715a1d16bd 100644
--- a/pkgs/applications/misc/evtest/default.nix
+++ b/pkgs/applications/misc/evtest/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchgit, autoreconfHook, automake, pkgconfig, libxml2 }:
+{ stdenv, fetchgit, autoreconfHook, pkgconfig, libxml2 }:
 
 stdenv.mkDerivation rec {
   name = "evtest-1.33";
diff --git a/pkgs/applications/misc/far2l/default.nix b/pkgs/applications/misc/far2l/default.nix
index 9ddd39981cc2..d8a0c53d9e1a 100644
--- a/pkgs/applications/misc/far2l/default.nix
+++ b/pkgs/applications/misc/far2l/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, makeWrapper, cmake, pkgconfig, wxGTK30, glib, pcre, m4, bash,
+{ stdenv, fetchFromGitHub, makeWrapper, cmake, pkgconfig, wxGTK30, glib, pcre, m4, bash,
   xdg_utils, gvfs, zip, unzip, gzip, bzip2, gnutar, p7zip, xz, imagemagick, darwin }:
 
 with stdenv.lib;
diff --git a/pkgs/applications/misc/finalterm/default.nix b/pkgs/applications/misc/finalterm/default.nix
index 93e5d297ffb3..2c024b9fe0ed 100644
--- a/pkgs/applications/misc/finalterm/default.nix
+++ b/pkgs/applications/misc/finalterm/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, makeWrapper
+{ stdenv, fetchFromGitHub, makeWrapper
 , pkgconfig, cmake, libxml2, vala_0_26, intltool, libmx, gnome3, gtk3, gtk-doc
 , keybinder3, clutter-gtk, libnotify
 , libxkbcommon, xorg, udev
diff --git a/pkgs/applications/misc/gcal/default.nix b/pkgs/applications/misc/gcal/default.nix
index f3f7fe2aacba..a3aebf227339 100644
--- a/pkgs/applications/misc/gcal/default.nix
+++ b/pkgs/applications/misc/gcal/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, ncurses  }:
+{ stdenv, fetchurl, ncurses  }:
 
 stdenv.mkDerivation rec {
   name = "gcal-${version}";
diff --git a/pkgs/applications/misc/golden-cheetah/default.nix b/pkgs/applications/misc/golden-cheetah/default.nix
index efd3bfe73dd9..f62eb92ac04a 100644
--- a/pkgs/applications/misc/golden-cheetah/default.nix
+++ b/pkgs/applications/misc/golden-cheetah/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl
 , qtbase, qtsvg, qtserialport, qtwebkit, qtmultimedia, qttools, qtconnectivity
-, yacc, flex, zlib, config, qmake, makeWrapper
+, yacc, flex, zlib, qmake, makeWrapper
 }:
 stdenv.mkDerivation rec {
   name = "golden-cheetah-${version}";
diff --git a/pkgs/applications/misc/googleearth/default.nix b/pkgs/applications/misc/googleearth/default.nix
index c77f8658220b..9c1b457c299d 100644
--- a/pkgs/applications/misc/googleearth/default.nix
+++ b/pkgs/applications/misc/googleearth/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, glibc, libGLU_combined, freetype, glib, libSM, libICE, libXi, libXv
-, libXrender, libXrandr, libXfixes, libXcursor, libXinerama, libXext, libX11, qt4
+, libXrender, libXrandr, libXfixes, libXcursor, libXinerama, libXext, libX11
 , zlib, fontconfig, dpkg, libproxy, libxml2, gstreamer, gst_all_1, dbus }:
 
 let
diff --git a/pkgs/applications/misc/gpsprune/default.nix b/pkgs/applications/misc/gpsprune/default.nix
index 586807b2dd5c..6689a3cae102 100644
--- a/pkgs/applications/misc/gpsprune/default.nix
+++ b/pkgs/applications/misc/gpsprune/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, makeDesktopItem, makeWrapper, unzip, bash, jre8 }:
+{ fetchurl, stdenv, makeDesktopItem, makeWrapper, unzip, jre8 }:
 
 stdenv.mkDerivation rec {
   name = "gpsprune-${version}";
diff --git a/pkgs/applications/misc/gpxsee/default.nix b/pkgs/applications/misc/gpxsee/default.nix
index d87ac459d021..ed0dd3ba5be3 100644
--- a/pkgs/applications/misc/gpxsee/default.nix
+++ b/pkgs/applications/misc/gpxsee/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, qmake, qtbase, qttools }:
+{ stdenv, fetchFromGitHub, qmake, qttools }:
 
 stdenv.mkDerivation rec {
   name = "gpxsee-${version}";
diff --git a/pkgs/applications/misc/gramps/default.nix b/pkgs/applications/misc/gramps/default.nix
index 50f575d15cec..b4b98909447e 100644
--- a/pkgs/applications/misc/gramps/default.nix
+++ b/pkgs/applications/misc/gramps/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, gtk3, pythonPackages, intltool, gnome3,
-  pango, gsettings-desktop-schemas, gobjectIntrospection, wrapGAppsHook,
+  pango, gobjectIntrospection, wrapGAppsHook,
 # Optional packages:
  enableOSM ? true, osm-gps-map
  }:
diff --git a/pkgs/applications/misc/gummi/default.nix b/pkgs/applications/misc/gummi/default.nix
index 5fdb8985bbbb..6c84f3cbd326 100644
--- a/pkgs/applications/misc/gummi/default.nix
+++ b/pkgs/applications/misc/gummi/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, pkgs, makeWrapper
+{ stdenv, pkgs, makeWrapper
 , glib, gnome2, gnome3, gtk2-x11, gtkspell2, poppler
 , pkgconfig, intltool, autoreconfHook, wrapGAppsHook
 }:
diff --git a/pkgs/applications/misc/hamster-time-tracker/default.nix b/pkgs/applications/misc/hamster-time-tracker/default.nix
index 105f7beb98fe..2abdce45c95f 100644
--- a/pkgs/applications/misc/hamster-time-tracker/default.nix
+++ b/pkgs/applications/misc/hamster-time-tracker/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchzip, pythonPackages, docbook2x, libxslt, gnome-doc-utils
-, intltool, dbus-glib, gnome_python, dbus
+, intltool, dbus-glib, gnome_python
 , hicolor-icon-theme
 }:
 
diff --git a/pkgs/applications/misc/haxor-news/default.nix b/pkgs/applications/misc/haxor-news/default.nix
index 624c15e118a2..1fa016627d4e 100644
--- a/pkgs/applications/misc/haxor-news/default.nix
+++ b/pkgs/applications/misc/haxor-news/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, python }:
+{ stdenv, python }:
 
 with python.pkgs;
 
diff --git a/pkgs/applications/misc/houdini/default.nix b/pkgs/applications/misc/houdini/default.nix
index 0b679617243d..607dff293189 100644
--- a/pkgs/applications/misc/houdini/default.nix
+++ b/pkgs/applications/misc/houdini/default.nix
@@ -1,4 +1,4 @@
-{ zsh, stdenv, callPackage, buildFHSUserEnv, undaemonize }:
+{ callPackage, buildFHSUserEnv, undaemonize }:
 
 let
   houdini-runtime = callPackage ./runtime.nix { };
diff --git a/pkgs/applications/misc/icesl/default.nix b/pkgs/applications/misc/icesl/default.nix
index 2295e15cc3d3..49b1741fd5af 100644
--- a/pkgs/applications/misc/icesl/default.nix
+++ b/pkgs/applications/misc/icesl/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchzip, patchelf, freeglut, libXmu, libXi, libX11, libICE, libGLU_combined, libSM, libXext, dialog, makeWrapper }:
+{ stdenv, lib, fetchzip, freeglut, libXmu, libXi, libX11, libICE, libGLU_combined, libSM, libXext, dialog, makeWrapper }:
 let
   lpath = stdenv.lib.makeLibraryPath [ libXmu libXi libX11 freeglut libICE libGLU_combined libSM libXext ];
 in
diff --git a/pkgs/applications/misc/josm/default.nix b/pkgs/applications/misc/josm/default.nix
index c4f10a1c35bb..9872ff23f347 100644
--- a/pkgs/applications/misc/josm/default.nix
+++ b/pkgs/applications/misc/josm/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, makeDesktopItem, makeWrapper, unzip, bash, jre10 }:
+{ fetchurl, stdenv, makeDesktopItem, makeWrapper, unzip, jre10 }:
 
 stdenv.mkDerivation rec {
   name = "josm-${version}";
diff --git a/pkgs/applications/misc/khard/default.nix b/pkgs/applications/misc/khard/default.nix
index 075640f702cb..3c5184d54632 100644
--- a/pkgs/applications/misc/khard/default.nix
+++ b/pkgs/applications/misc/khard/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub, glibcLocales, python3 }:
+{ stdenv, fetchurl, glibcLocales, python3 }:
 
 let
   python = python3.override {
diff --git a/pkgs/applications/misc/kitty/default.nix b/pkgs/applications/misc/kitty/default.nix
index 38c2494c9f7d..0c894fb0b612 100644
--- a/pkgs/applications/misc/kitty/default.nix
+++ b/pkgs/applications/misc/kitty/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, fetchFromGitHub, pkgs, python3Packages, glfw, libunistring, harfbuzz,
-  fontconfig, zlib, pkgconfig, ncurses, imagemagick, makeWrapper, xsel,
+{ stdenv, fetchFromGitHub, python3Packages, glfw, libunistring, harfbuzz,
+  fontconfig, pkgconfig, ncurses, imagemagick, xsel,
   libstartup_notification, libX11, libXrandr, libXinerama, libXcursor,
   libxkbcommon, libXi, libXext, wayland-protocols, wayland,
   which
diff --git a/pkgs/applications/misc/kiwix/default.nix b/pkgs/applications/misc/kiwix/default.nix
index 699cb2fd0986..c37d26f3dbcc 100644
--- a/pkgs/applications/misc/kiwix/default.nix
+++ b/pkgs/applications/misc/kiwix/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, makeWrapper, pkgconfig
 , zip, python, zlib, which, icu, libmicrohttpd, lzma, aria2, wget, bc
-, libuuid, glibc, libX11, libXext, libXt, libXrender, glib, dbus, dbus-glib
+, libuuid, libX11, libXext, libXt, libXrender, glib, dbus, dbus-glib
 , gtk2, gdk_pixbuf, pango, cairo, freetype, fontconfig, alsaLib, atk, cmake
 , xapian, ctpp2, zimlib
 }:
diff --git a/pkgs/applications/misc/kupfer/default.nix b/pkgs/applications/misc/kupfer/default.nix
index bb55fc2d4a8b..3072963c43e8 100644
--- a/pkgs/applications/misc/kupfer/default.nix
+++ b/pkgs/applications/misc/kupfer/default.nix
@@ -1,11 +1,9 @@
 { stdenv
-, makeWrapper
 , fetchurl
 , intltool
 , python3Packages
 , gobjectIntrospection
 , gtk3
-, dbus
 , libwnck3
 , keybinder3
 , hicolor-icon-theme
diff --git a/pkgs/applications/misc/llpp/default.nix b/pkgs/applications/misc/llpp/default.nix
index 25067e3bba56..372adef4375c 100644
--- a/pkgs/applications/misc/llpp/default.nix
+++ b/pkgs/applications/misc/llpp/default.nix
@@ -1,5 +1,5 @@
 { stdenv, lib, makeWrapper, fetchgit, pkgconfig, ninja, ocaml, findlib, mupdf
-, lablgl, gtk3, openjpeg, jbig2dec, mujs, xsel, openssl, freetype, ncurses }:
+, gtk3, openjpeg, jbig2dec, mujs, xsel, openssl, freetype, ncurses }:
 
 assert lib.versionAtLeast (lib.getVersion ocaml) "4.02";
 
diff --git a/pkgs/applications/misc/madonctl/default.nix b/pkgs/applications/misc/madonctl/default.nix
index 787ce7231f30..f2dacb7890f0 100644
--- a/pkgs/applications/misc/madonctl/default.nix
+++ b/pkgs/applications/misc/madonctl/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildGoPackage, fetchFromGitHub, fetchgx }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "madonctl-${version}";
diff --git a/pkgs/applications/misc/masterpdfeditor/default.nix b/pkgs/applications/misc/masterpdfeditor/default.nix
index fb17aadfa490..23f14d7ac9af 100644
--- a/pkgs/applications/misc/masterpdfeditor/default.nix
+++ b/pkgs/applications/misc/masterpdfeditor/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, glibc, sane-backends, qtbase, qtsvg, libXext, libX11, libXdmcp, libXau, libxcb, autoPatchelfHook }:
+{ stdenv, fetchurl, sane-backends, qtbase, qtsvg, autoPatchelfHook }:
 let
   version = "4.3.89";
 in stdenv.mkDerivation {
diff --git a/pkgs/applications/misc/mop/default.nix b/pkgs/applications/misc/mop/default.nix
index 336b136c56d6..8c6bd92d5362 100644
--- a/pkgs/applications/misc/mop/default.nix
+++ b/pkgs/applications/misc/mop/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchgit }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "mop-${version}";
diff --git a/pkgs/applications/misc/octoprint/default.nix b/pkgs/applications/misc/octoprint/default.nix
index 6b057186eaf3..2abbfdea0417 100644
--- a/pkgs/applications/misc/octoprint/default.nix
+++ b/pkgs/applications/misc/octoprint/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, python2, fetchurl }:
+{ stdenv, fetchFromGitHub, python2 }:
 
 let
 
diff --git a/pkgs/applications/misc/octoprint/plugins.nix b/pkgs/applications/misc/octoprint/plugins.nix
index 0a1d26012a80..bd65acf5e5e9 100644
--- a/pkgs/applications/misc/octoprint/plugins.nix
+++ b/pkgs/applications/misc/octoprint/plugins.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, octoprint, pythonPackages }:
+{ stdenv, fetchFromGitHub, octoprint, pythonPackages }:
 
 let
   buildPlugin = args: pythonPackages.buildPythonApplication (args // {
diff --git a/pkgs/applications/misc/orca/default.nix b/pkgs/applications/misc/orca/default.nix
index ca06b5fa6df6..199fa3e9bfe9 100644
--- a/pkgs/applications/misc/orca/default.nix
+++ b/pkgs/applications/misc/orca/default.nix
@@ -1,9 +1,9 @@
-{ stdenv, lib, pkgconfig, fetchurl, buildPythonApplication
+{ lib, pkgconfig, fetchurl, buildPythonApplication
 , autoreconfHook, wrapGAppsHook, gobjectIntrospection
 , intltool, yelp-tools, itstool, libxmlxx3
 , python, pygobject3, gtk3, gnome3, substituteAll
 , at-spi2-atk, at-spi2-core, pyatspi, dbus, dbus-python, pyxdg
-, xkbcomp, gsettings-desktop-schemas, liblouis
+, xkbcomp, gsettings-desktop-schemas
 , speechd, brltty, setproctitle, gst_all_1, gst-python
 }:
 
diff --git a/pkgs/applications/misc/perkeep/default.nix b/pkgs/applications/misc/perkeep/default.nix
index 746a319c2e1e..9ecf0da58067 100644
--- a/pkgs/applications/misc/perkeep/default.nix
+++ b/pkgs/applications/misc/perkeep/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, go, fetchzip, git, fetchpatch, fetchFromGitHub, fetchgit }:
+{ stdenv, go, fetchzip, git, fetchFromGitHub, fetchgit }:
 
 # When perkeep is updated all deps in the let block should be removed
 let
diff --git a/pkgs/applications/misc/pgmanage/default.nix b/pkgs/applications/misc/pgmanage/default.nix
index 23ab0f8d34ad..a548c149665a 100644
--- a/pkgs/applications/misc/pgmanage/default.nix
+++ b/pkgs/applications/misc/pgmanage/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, runCommand, postgresql, openssl } :
+{ stdenv, fetchFromGitHub, postgresql, openssl } :
 
 stdenv.mkDerivation rec {
   name = "pgmanage-${version}";
diff --git a/pkgs/applications/misc/polybar/default.nix b/pkgs/applications/misc/polybar/default.nix
index 05ad3e2a9066..3ac719d18d25 100644
--- a/pkgs/applications/misc/polybar/default.nix
+++ b/pkgs/applications/misc/polybar/default.nix
@@ -1,6 +1,6 @@
 { cairo, cmake, fetchgit, libXdmcp, libpthreadstubs, libxcb, pcre, pkgconfig
 , python2 , stdenv, xcbproto, xcbutil, xcbutilimage, xcbutilrenderutil
-, xcbutilwm, xcbutilxrm, fetchpatch, makeWrapper
+, xcbutilwm, xcbutilxrm, makeWrapper
 
 # optional packages-- override the variables ending in 'Support' to enable or
 # disable modules
diff --git a/pkgs/applications/misc/pt/default.nix b/pkgs/applications/misc/pt/default.nix
index a400bb04da43..dbda7664bde0 100644
--- a/pkgs/applications/misc/pt/default.nix
+++ b/pkgs/applications/misc/pt/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, bundlerEnv, ruby }:
+{ lib, bundlerEnv, ruby }:
 
 bundlerEnv {
   name = "pt-0.7.3";
diff --git a/pkgs/applications/misc/redis-desktop-manager/default.nix b/pkgs/applications/misc/redis-desktop-manager/default.nix
index 7a4348260fd3..bf4559e91178 100644
--- a/pkgs/applications/misc/redis-desktop-manager/default.nix
+++ b/pkgs/applications/misc/redis-desktop-manager/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchgit, fetchpatch, pkgconfig, libssh2
+{ stdenv, lib, fetchgit, pkgconfig, libssh2
 , qtbase, qtdeclarative, qtgraphicaleffects, qtimageformats, qtquickcontrols
 , qtsvg, qttools, qtquick1, qtcharts
 , qmake
diff --git a/pkgs/applications/misc/redshift/default.nix b/pkgs/applications/misc/redshift/default.nix
index dcc8300550f4..c6d3d6e1a9d5 100644
--- a/pkgs/applications/misc/redshift/default.nix
+++ b/pkgs/applications/misc/redshift/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchurl, autoconf, automake, gettext, intltool
+{ stdenv, fetchFromGitHub, autoconf, automake, gettext, intltool
 , libtool, pkgconfig, wrapGAppsHook, wrapPython, gobjectIntrospection
 , gtk3, python, pygobject3, hicolor-icon-theme, pyxdg
 
diff --git a/pkgs/applications/misc/rofi/default.nix b/pkgs/applications/misc/rofi/default.nix
index 7da721e9f374..2d22d87c49a8 100644
--- a/pkgs/applications/misc/rofi/default.nix
+++ b/pkgs/applications/misc/rofi/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, autoreconfHook, pkgconfig, libxkbcommon, pango, which, git
-, cairo, glib, libxcb, xcbutil, xcbutilwm, xcbutilxrm, libstartup_notification
+, cairo, libxcb, xcbutil, xcbutilwm, xcbutilxrm, libstartup_notification
 , bison, flex, librsvg, check
 }:
 
diff --git a/pkgs/applications/misc/rofi/wrapper.nix b/pkgs/applications/misc/rofi/wrapper.nix
index 17bbf1583c46..c2384f56faa1 100644
--- a/pkgs/applications/misc/rofi/wrapper.nix
+++ b/pkgs/applications/misc/rofi/wrapper.nix
@@ -1,4 +1,4 @@
-{ stdenv, rofi-unwrapped, makeWrapper, theme ? null, lib }:
+{ stdenv, rofi-unwrapped, makeWrapper, theme ? null }:
 
 if theme == null then rofi-unwrapped else
 stdenv.mkDerivation {
diff --git a/pkgs/applications/misc/roxterm/default.nix b/pkgs/applications/misc/roxterm/default.nix
index 3ef5a6c4e345..11a75e4064f4 100644
--- a/pkgs/applications/misc/roxterm/default.nix
+++ b/pkgs/applications/misc/roxterm/default.nix
@@ -1,6 +1,6 @@
-{ stdenv, fetchurl, docbook_xsl, dbus, dbus-glib, expat, gettext
-, gsettings-desktop-schemas, gdk_pixbuf, gtk2, gtk3, hicolor-icon-theme
-, imagemagick, itstool, librsvg, libtool, libxslt, lockfile, makeWrapper
+{ stdenv, fetchurl, docbook_xsl, dbus, dbus-glib, expat
+, gsettings-desktop-schemas, gdk_pixbuf, gtk3, hicolor-icon-theme
+, imagemagick, itstool, librsvg, libtool, libxslt, makeWrapper
 , pkgconfig, python, pythonPackages, vte
 , wrapGAppsHook}:
 
diff --git a/pkgs/applications/misc/rtv/default.nix b/pkgs/applications/misc/rtv/default.nix
index d20276968244..5c16a02ddb8c 100644
--- a/pkgs/applications/misc/rtv/default.nix
+++ b/pkgs/applications/misc/rtv/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, pkgs, pythonPackages }:
+{ stdenv, fetchFromGitHub, pythonPackages }:
 
 with pythonPackages;
 buildPythonApplication rec {
diff --git a/pkgs/applications/misc/rxvt_unicode/wrapper.nix b/pkgs/applications/misc/rxvt_unicode/wrapper.nix
index 98d7e12a8ed8..909c267def82 100644
--- a/pkgs/applications/misc/rxvt_unicode/wrapper.nix
+++ b/pkgs/applications/misc/rxvt_unicode/wrapper.nix
@@ -1,4 +1,4 @@
-{ stdenv, symlinkJoin, rxvt_unicode, makeWrapper, plugins }:
+{ symlinkJoin, rxvt_unicode, makeWrapper, plugins }:
 
 let
   rxvt_name = builtins.parseDrvName rxvt_unicode.name;
diff --git a/pkgs/applications/misc/simplenote/default.nix b/pkgs/applications/misc/simplenote/default.nix
index 513c5facc6b2..8049cc2feae7 100644
--- a/pkgs/applications/misc/simplenote/default.nix
+++ b/pkgs/applications/misc/simplenote/default.nix
@@ -1,5 +1,5 @@
 { fetchurl, stdenv, lib, zlib, glib, alsaLib, dbus, gtk2, atk, pango, freetype, fontconfig
-, libgnome-keyring3, gdk_pixbuf, gvfs, cairo, cups, expat, libgpgerror, nspr
+, libgnome-keyring3, gdk_pixbuf, cairo, cups, expat, libgpgerror, nspr
 , nss, xorg, libcap, systemd, libnotify ,libXScrnSaver, gnome3 }:
 
  stdenv.mkDerivation rec {
diff --git a/pkgs/applications/misc/slic3r/prusa3d.nix b/pkgs/applications/misc/slic3r/prusa3d.nix
index 11a5baa288dd..9f4036c3f967 100644
--- a/pkgs/applications/misc/slic3r/prusa3d.nix
+++ b/pkgs/applications/misc/slic3r/prusa3d.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, makeWrapper, which, cmake, perl, perlPackages,
-  boost, tbb, wxGTK30, pkgconfig, gtk3, fetchurl, gtk2, bash, libGLU,
+  boost, tbb, wxGTK30, pkgconfig, gtk3, fetchurl, gtk2, libGLU,
   glew, eigen, curl }:
 let
   AlienWxWidgets = perlPackages.buildPerlPackage rec {
diff --git a/pkgs/applications/misc/spacefm/default.nix b/pkgs/applications/misc/spacefm/default.nix
index 6fa594dec046..9f20b20f7f3a 100644
--- a/pkgs/applications/misc/spacefm/default.nix
+++ b/pkgs/applications/misc/spacefm/default.nix
@@ -1,6 +1,6 @@
 { pkgs, fetchFromGitHub, stdenv, gtk3, udev, desktop-file-utils
 , shared-mime-info, intltool, pkgconfig, wrapGAppsHook, ffmpegthumbnailer
-, jmtpfs, ifuseSupport ? false, ifuse ? null, lsof, udisks2, hicolor-icon-theme, adwaita-icon-theme }:
+, jmtpfs, ifuseSupport ? false, ifuse ? null, lsof, udisks2 }:
 
 stdenv.mkDerivation rec {
   name = "spacefm-${version}";
diff --git a/pkgs/applications/misc/sweethome3d/editors.nix b/pkgs/applications/misc/sweethome3d/editors.nix
index 6c4b32ca9aa6..14285a52e27c 100644
--- a/pkgs/applications/misc/sweethome3d/editors.nix
+++ b/pkgs/applications/misc/sweethome3d/editors.nix
@@ -1,5 +1,5 @@
-{ stdenv, fetchurl, fetchcvs, makeWrapper, makeDesktopItem, jdk, jre, ant
-, gtk3, gsettings-desktop-schemas, p7zip, sweethome3dApp }:
+{ stdenv, fetchcvs, makeWrapper, makeDesktopItem, jdk, jre, ant
+, gtk3, gsettings-desktop-schemas, sweethome3dApp }:
 
 let
 
diff --git a/pkgs/applications/misc/tasksh/default.nix b/pkgs/applications/misc/tasksh/default.nix
index 1e51ba22ddc3..dac447edd7d2 100644
--- a/pkgs/applications/misc/tasksh/default.nix
+++ b/pkgs/applications/misc/tasksh/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, cmake, libuuid, gnutls, readline }:
+{ stdenv, fetchurl, cmake, readline }:
 
 stdenv.mkDerivation rec {
   name = "tasksh-${version}";
diff --git a/pkgs/applications/misc/tilix/default.nix b/pkgs/applications/misc/tilix/default.nix
index 1cc03b4cd426..f30c6a639489 100644
--- a/pkgs/applications/misc/tilix/default.nix
+++ b/pkgs/applications/misc/tilix/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, autoreconfHook, pkgconfig, dmd, gnome3, dbus
-, gsettings-desktop-schemas, libsecret, desktop-file-utils, gettext, gtkd
+, gsettings-desktop-schemas, desktop-file-utils, gettext, gtkd
 , perlPackages, wrapGAppsHook, xdg_utils }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/misc/timewarrior/default.nix b/pkgs/applications/misc/timewarrior/default.nix
index 9aca45264af3..ff3caec29644 100644
--- a/pkgs/applications/misc/timewarrior/default.nix
+++ b/pkgs/applications/misc/timewarrior/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, cmake, libuuid, gnutls }:
+{ stdenv, fetchurl, cmake }:
 
 stdenv.mkDerivation rec {
   name = "timewarrior-${version}";
diff --git a/pkgs/applications/misc/twmn/default.nix b/pkgs/applications/misc/twmn/default.nix
index 297f3d0b5991..020aa963541e 100644
--- a/pkgs/applications/misc/twmn/default.nix
+++ b/pkgs/applications/misc/twmn/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, fetchgit, qtbase, qtx11extras, qmake, pkgconfig, boost }:
+{ stdenv, fetchgit, qtbase, qtx11extras, qmake, pkgconfig, boost }:
 
 stdenv.mkDerivation rec {
   name = "twmn-git-2014-09-23";
diff --git a/pkgs/applications/misc/wego/default.nix b/pkgs/applications/misc/wego/default.nix
index e59a3e989432..b61566af6b2c 100644
--- a/pkgs/applications/misc/wego/default.nix
+++ b/pkgs/applications/misc/wego/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "wego-${version}";
diff --git a/pkgs/applications/misc/welle-io/default.nix b/pkgs/applications/misc/welle-io/default.nix
index 27376f4db81c..410346bce9ad 100644
--- a/pkgs/applications/misc/welle-io/default.nix
+++ b/pkgs/applications/misc/welle-io/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildEnv, fetchFromGitHub, cmake, pkgconfig
+{ stdenv, fetchFromGitHub, cmake, pkgconfig
 , qtbase, qtcharts, qtmultimedia, qtquickcontrols, qtquickcontrols2
 , faad2, rtl-sdr, soapysdr-with-plugins, libusb, fftwSinglePrec }:
 let
diff --git a/pkgs/applications/misc/wsjtx/default.nix b/pkgs/applications/misc/wsjtx/default.nix
index 23be3a5dc4fa..fd6be8f59201 100644
--- a/pkgs/applications/misc/wsjtx/default.nix
+++ b/pkgs/applications/misc/wsjtx/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, asciidoc, asciidoctor, autoconf, automake, cmake,
-  docbook_xsl, fftw, fftwFloat, gfortran, libtool, libpulseaudio, qtbase,
+  docbook_xsl, fftw, fftwFloat, gfortran, libtool, qtbase,
   qtmultimedia, qtserialport, texinfo, libusb1 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/misc/xmr-stak/default.nix b/pkgs/applications/misc/xmr-stak/default.nix
index 05530af12547..9d68affa7ad2 100644
--- a/pkgs/applications/misc/xmr-stak/default.nix
+++ b/pkgs/applications/misc/xmr-stak/default.nix
@@ -1,5 +1,5 @@
 { stdenv, stdenvGcc6, lib
-, fetchFromGitHub, cmake, libuv, libmicrohttpd, openssl
+, fetchFromGitHub, cmake, libmicrohttpd, openssl
 , opencl-headers, ocl-icd, hwloc, cudatoolkit
 , devDonationLevel ? "0.0"
 , cudaSupport ? false
diff --git a/pkgs/applications/misc/yarssr/default.nix b/pkgs/applications/misc/yarssr/default.nix
index cadf5ccb6a48..2c569b7d6816 100644
--- a/pkgs/applications/misc/yarssr/default.nix
+++ b/pkgs/applications/misc/yarssr/default.nix
@@ -1,6 +1,6 @@
 {
 fetchFromGitHub, stdenv, lib,
-autoreconfHook, intltool, pkgconfig, makeWrapper, pkgs,
+makeWrapper, pkgs,
 perl, perlPackages,
 gnome2 }:
 
diff --git a/pkgs/applications/misc/yubioath-desktop/default.nix b/pkgs/applications/misc/yubioath-desktop/default.nix
index 06fa8d2bd0dd..8843c821ffb4 100644
--- a/pkgs/applications/misc/yubioath-desktop/default.nix
+++ b/pkgs/applications/misc/yubioath-desktop/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl,  python27Packages, swig, gettext, pcsclite, qt48Full, yubikey-personalization }:
+{ stdenv, fetchurl,  python27Packages, pcsclite, yubikey-personalization }:
 
 python27Packages.buildPythonApplication rec {
     namePrefix = "";
diff --git a/pkgs/applications/misc/zathura/core/default.nix b/pkgs/applications/misc/zathura/core/default.nix
index 415995a828d6..001d70775d6d 100644
--- a/pkgs/applications/misc/zathura/core/default.nix
+++ b/pkgs/applications/misc/zathura/core/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, meson, ninja, makeWrapper, pkgconfig
 , appstream-glib, desktop-file-utils, python3
-, gtk, girara, ncurses, gettext, libxml2
+, gtk, girara, gettext, libxml2
 , file, sqlite, glib, texlive, libintl, libseccomp
 , gtk-mac-integration, synctexSupport ? true
 }:
diff --git a/pkgs/applications/misc/zathura/pdf-mupdf/default.nix b/pkgs/applications/misc/zathura/pdf-mupdf/default.nix
index 86fe453465a5..9d86dfe4a445 100644
--- a/pkgs/applications/misc/zathura/pdf-mupdf/default.nix
+++ b/pkgs/applications/misc/zathura/pdf-mupdf/default.nix
@@ -1,6 +1,5 @@
 { stdenv, lib, meson, ninja, fetchurl, pkgconfig, zathura_core, cairo,
-gtk-mac-integration, girara, mupdf, openssl , libjpeg, jbig2dec,
-openjpeg, fetchpatch }:
+gtk-mac-integration, girara, mupdf }:
 
 stdenv.mkDerivation rec {
   version = "0.3.3";
diff --git a/pkgs/applications/misc/zscroll/default.nix b/pkgs/applications/misc/zscroll/default.nix
index 92d173807f90..18876cf355b8 100644
--- a/pkgs/applications/misc/zscroll/default.nix
+++ b/pkgs/applications/misc/zscroll/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, python3, python3Packages, fetchFromGitHub }:
+{ stdenv, python3, python3Packages, fetchFromGitHub }:
 
 let version = "1.0"; in
 
diff --git a/pkgs/applications/networking/browsers/chromium/common.nix b/pkgs/applications/networking/browsers/chromium/common.nix
index 196e2eb79bd0..c2471d8a0eaa 100644
--- a/pkgs/applications/networking/browsers/chromium/common.nix
+++ b/pkgs/applications/networking/browsers/chromium/common.nix
@@ -5,7 +5,7 @@
 , libevent, expat, libjpeg, snappy
 , libpng, libcap
 , xdg_utils, yasm, minizip, libwebp
-, libusb1, pciutils, nss, re2, zlib, libvpx
+, libusb1, pciutils, nss, re2, zlib
 
 , python2Packages, perl, pkgconfig
 , nspr, systemd, kerberos
@@ -14,11 +14,10 @@
 , glib, gtk2, gtk3, dbus-glib
 , libXScrnSaver, libXcursor, libXtst, libGLU_combined
 , protobuf, speechd, libXdamage, cups
-, ffmpeg, harfbuzz, harfbuzz-icu, libxslt, libxml2
+, ffmpeg, libxslt, libxml2
 
 # optional dependencies
 , libgcrypt ? null # gnomeSupport || cupsSupport
-, libexif ? null # only needed for Chromium before version 51
 
 # package customization
 , enableNaCl ? false
diff --git a/pkgs/applications/networking/browsers/falkon/default.nix b/pkgs/applications/networking/browsers/falkon/default.nix
index 9dad2df7fd0a..21631ef191c4 100644
--- a/pkgs/applications/networking/browsers/falkon/default.nix
+++ b/pkgs/applications/networking/browsers/falkon/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, lib, fetchFromGitHub, cmake, extra-cmake-modules, pkgconfig, qmake
-, libpthreadstubs, libxcb, libXdmcp, qtsvg, qttools, qtwebengine, qtx11extras, kwallet, openssl }:
+{ stdenv, fetchFromGitHub, cmake, extra-cmake-modules, pkgconfig, qmake
+, libpthreadstubs, libxcb, libXdmcp, qtsvg, qttools, qtwebengine, qtx11extras, kwallet }:
 
 stdenv.mkDerivation rec {
   name = "falkon-${version}";
diff --git a/pkgs/applications/networking/browsers/firefox/common.nix b/pkgs/applications/networking/browsers/firefox/common.nix
index 50eb396d6442..336cd2556611 100644
--- a/pkgs/applications/networking/browsers/firefox/common.nix
+++ b/pkgs/applications/networking/browsers/firefox/common.nix
@@ -8,7 +8,7 @@
 , freetype, fontconfig, file, nspr, nss, libnotify
 , yasm, libGLU_combined, sqlite, unzip, makeWrapper
 , hunspell, libevent, libstartup_notification, libvpx
-, cairo, icu, libpng, jemalloc, glib
+, icu, libpng, jemalloc, glib
 , autoconf213, which, gnused, cargo, rustc, llvmPackages
 , debugBuild ? false
 
diff --git a/pkgs/applications/networking/browsers/firefox/packages.nix b/pkgs/applications/networking/browsers/firefox/packages.nix
index bdb9dab4f9d2..f1d7b216120d 100644
--- a/pkgs/applications/networking/browsers/firefox/packages.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages.nix
@@ -1,4 +1,4 @@
-{ lib, callPackage, stdenv, overrideCC, gcc5, fetchurl, fetchFromGitHub, fetchpatch, python3 }:
+{ lib, callPackage, stdenv, fetchurl, fetchFromGitHub, fetchpatch, python3 }:
 
 let
 
diff --git a/pkgs/applications/networking/browsers/google-chrome/default.nix b/pkgs/applications/networking/browsers/google-chrome/default.nix
index 2df2043517ae..52a2ccb292bb 100644
--- a/pkgs/applications/networking/browsers/google-chrome/default.nix
+++ b/pkgs/applications/networking/browsers/google-chrome/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, patchelf, makeWrapper
+{ stdenv, patchelf, makeWrapper
 
 # Linked dynamic libraries.
 , glib, fontconfig, freetype, pango, cairo, libX11, libXi, atk, gconf, nss, nspr
diff --git a/pkgs/applications/networking/browsers/lynx/default.nix b/pkgs/applications/networking/browsers/lynx/default.nix
index 9cdd32d2aaed..6097c0e95f0d 100644
--- a/pkgs/applications/networking/browsers/lynx/default.nix
+++ b/pkgs/applications/networking/browsers/lynx/default.nix
@@ -1,7 +1,6 @@
 { stdenv, buildPackages
 , fetchurl, pkgconfig, ncurses, gzip
 , sslSupport ? true, openssl ? null
-, buildPlatform, hostPlatform
 , nukeReferences
 }:
 
diff --git a/pkgs/applications/networking/browsers/mozilla-plugins/google-talk-plugin/default.nix b/pkgs/applications/networking/browsers/mozilla-plugins/google-talk-plugin/default.nix
index a320321ea171..a172e0e8d5d9 100644
--- a/pkgs/applications/networking/browsers/mozilla-plugins/google-talk-plugin/default.nix
+++ b/pkgs/applications/networking/browsers/mozilla-plugins/google-talk-plugin/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, rpm, cpio, libGL, xorg, cairo
+{ stdenv, fetchurl, libGL, xorg, cairo
 , libpng, gtk2, glib, gdk_pixbuf, fontconfig, freetype, curl
 , dbus-glib, alsaLib, libpulseaudio, systemd, pango
 }:
diff --git a/pkgs/applications/networking/browsers/mozilla-plugins/trezor/default.nix b/pkgs/applications/networking/browsers/mozilla-plugins/trezor/default.nix
index fb6e85ccdbba..3d4e0fc00225 100644
--- a/pkgs/applications/networking/browsers/mozilla-plugins/trezor/default.nix
+++ b/pkgs/applications/networking/browsers/mozilla-plugins/trezor/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, dpkg, zlib }:
+{ stdenv, fetchurl, dpkg }:
 
 stdenv.mkDerivation {
   name = "TREZOR-bridge-1.0.5";
diff --git a/pkgs/applications/networking/browsers/otter/default.nix b/pkgs/applications/networking/browsers/otter/default.nix
index 0a8efb3aace9..d1f50627d905 100644
--- a/pkgs/applications/networking/browsers/otter/default.nix
+++ b/pkgs/applications/networking/browsers/otter/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, cmake, openssl, gst_all_1, fetchFromGitHub
+{ stdenv, cmake, fetchFromGitHub
 , qtbase, qtmultimedia, qtwebengine
 , version ? "0.9.96"
 , sourceSha ? "1xzfy3jjx9sskwwbk7l8hnwnjf8af62p4kjkydp0ld0j50apc39p"
diff --git a/pkgs/applications/networking/browsers/vimprobable2/default.nix b/pkgs/applications/networking/browsers/vimprobable2/default.nix
index 54abc7dedff4..9de7518677de 100644
--- a/pkgs/applications/networking/browsers/vimprobable2/default.nix
+++ b/pkgs/applications/networking/browsers/vimprobable2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, makeWrapper, glib, glib-networking, gtk2, libsoup, libX11, perl,
+{ stdenv, fetchurl, makeWrapper, glib-networking, gtk2, libsoup, libX11, perl,
   pkgconfig, webkit, gsettings-desktop-schemas }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/networking/browsers/vivaldi/default.nix b/pkgs/applications/networking/browsers/vivaldi/default.nix
index 7aba25dc339a..11264df98f13 100644
--- a/pkgs/applications/networking/browsers/vivaldi/default.nix
+++ b/pkgs/applications/networking/browsers/vivaldi/default.nix
@@ -1,8 +1,8 @@
 { stdenv, fetchurl, zlib, libX11, libXext, libSM, libICE
 , libXfixes, libXt, libXi, libXcursor, libXScrnSaver, libXcomposite, libXdamage, libXtst, libXrandr
 , alsaLib, dbus, cups, libexif, ffmpeg, systemd
-, freetype, fontconfig, libXft, libXrender, libxcb, expat, libXau, libXdmcp
-, libuuid, xz
+, freetype, fontconfig, libXft, libXrender, libxcb, expat
+, libuuid
 , gstreamer, gst-plugins-base, libxml2
 , glib, gtk3, pango, gdk_pixbuf, cairo, atk, at-spi2-atk, gnome3
 , nss, nspr
diff --git a/pkgs/applications/networking/browsers/vivaldi/ffmpeg-codecs.nix b/pkgs/applications/networking/browsers/vivaldi/ffmpeg-codecs.nix
index 11aa0ce706d6..ab2c24727d7c 100644
--- a/pkgs/applications/networking/browsers/vivaldi/ffmpeg-codecs.nix
+++ b/pkgs/applications/networking/browsers/vivaldi/ffmpeg-codecs.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch
+{ stdenv, fetchurl
 , dbus-glib, gtk2, gtk3, libexif, libpulseaudio, libXScrnSaver, ninja, nss
 , pciutils, pkgconfig, python2, xdg_utils
 }:
diff --git a/pkgs/applications/networking/cluster/habitat/default.nix b/pkgs/applications/networking/cluster/habitat/default.nix
index 1656e5a09a6b..0c210dcc535b 100644
--- a/pkgs/applications/networking/cluster/habitat/default.nix
+++ b/pkgs/applications/networking/cluster/habitat/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, rustPlatform, pkgconfig
+{ lib, fetchFromGitHub, rustPlatform, pkgconfig
 , libsodium, libarchive, openssl }:
 
 with rustPlatform;
diff --git a/pkgs/applications/networking/cluster/kompose/default.nix b/pkgs/applications/networking/cluster/kompose/default.nix
index ff0f664154aa..d6e703f79d05 100644
--- a/pkgs/applications/networking/cluster/kompose/default.nix
+++ b/pkgs/applications/networking/cluster/kompose/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "kompose-${version}";
diff --git a/pkgs/applications/networking/cluster/kops/default.nix b/pkgs/applications/networking/cluster/kops/default.nix
index a1e17f60810d..5f7a2e8e2843 100644
--- a/pkgs/applications/networking/cluster/kops/default.nix
+++ b/pkgs/applications/networking/cluster/kops/default.nix
@@ -1,5 +1,5 @@
 
-{ stdenv, lib, buildGoPackage, fetchFromGitHub, go-bindata }:
+{ stdenv, buildGoPackage, fetchFromGitHub, go-bindata }:
 
 buildGoPackage rec {
   name = "kops-${version}";
diff --git a/pkgs/applications/networking/cluster/kubernetes/default.nix b/pkgs/applications/networking/cluster/kubernetes/default.nix
index 6bd7ba3eac2c..01bf3467af95 100644
--- a/pkgs/applications/networking/cluster/kubernetes/default.nix
+++ b/pkgs/applications/networking/cluster/kubernetes/default.nix
@@ -1,5 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, fetchpatch, removeReferencesTo, which, go_1_9, go-bindata, makeWrapper, rsync
-, iptables, coreutils
+{ stdenv, lib, fetchFromGitHub, removeReferencesTo, which, go_1_9, go-bindata, makeWrapper, rsync
 , components ? [
     "cmd/kubeadm"
     "cmd/kubectl"
diff --git a/pkgs/applications/networking/cluster/mesos/default.nix b/pkgs/applications/networking/cluster/mesos/default.nix
index 961c0afc5c50..6e2089f99352 100644
--- a/pkgs/applications/networking/cluster/mesos/default.nix
+++ b/pkgs/applications/networking/cluster/mesos/default.nix
@@ -1,6 +1,6 @@
 { stdenv, lib, makeWrapper, fetchurl, curl, sasl, openssh
 , unzip, gnutar, jdk, python, wrapPython
-, setuptools, boto, pythonProtobuf, apr, subversion, gzip, systemd
+, setuptools, boto, pythonProtobuf, apr, subversion, gzip
 , leveldb, glog, perf, utillinux, libnl, iproute, openssl, libevent
 , ethtool, coreutils, which, iptables, maven
 , bash, autoreconfHook
diff --git a/pkgs/applications/networking/cluster/minikube/default.nix b/pkgs/applications/networking/cluster/minikube/default.nix
index 4c2e1b6f4c0e..b674f1f64580 100644
--- a/pkgs/applications/networking/cluster/minikube/default.nix
+++ b/pkgs/applications/networking/cluster/minikube/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, buildGoPackage, fetchFromGitHub, fetchurl, go-bindata, libvirt, qemu
-, gpgme, makeWrapper, hostPlatform, vmnet, python, pkgconfig
+{ stdenv, buildGoPackage, fetchFromGitHub, go-bindata, libvirt, qemu
+, gpgme, makeWrapper, hostPlatform, vmnet, python
 , docker-machine-kvm, docker-machine-kvm2
 , extraDrivers ? []
 }:
diff --git a/pkgs/applications/networking/cluster/openshift/default.nix b/pkgs/applications/networking/cluster/openshift/default.nix
index 6b6a2dc8986b..6f836d27357a 100644
--- a/pkgs/applications/networking/cluster/openshift/default.nix
+++ b/pkgs/applications/networking/cluster/openshift/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, lib, fetchFromGitHub, fetchpatch, removeReferencesTo, which, go_1_9, go-bindata, makeWrapper, rsync, utillinux
-, iptables, coreutils, kerberos, clang
+{ stdenv, lib, fetchFromGitHub, removeReferencesTo, which, go_1_9, go-bindata, makeWrapper, rsync, utillinux
+, coreutils, kerberos, clang
 , components ? [
   "cmd/oc"
   "cmd/openshift"
diff --git a/pkgs/applications/networking/cluster/taktuk/default.nix b/pkgs/applications/networking/cluster/taktuk/default.nix
index 1510dc575cc9..c61896d89218 100644
--- a/pkgs/applications/networking/cluster/taktuk/default.nix
+++ b/pkgs/applications/networking/cluster/taktuk/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, perl , openssh}:
+{ stdenv, fetchurl, perl }:
 
 stdenv.mkDerivation rec {
   version = "3.7.7";
diff --git a/pkgs/applications/networking/cluster/terraform-provider-ibm/default.nix b/pkgs/applications/networking/cluster/terraform-provider-ibm/default.nix
index ad4edec6b4ea..fddf13795f3e 100644
--- a/pkgs/applications/networking/cluster/terraform-provider-ibm/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-provider-ibm/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 #
 # USAGE:
diff --git a/pkgs/applications/networking/cluster/terraform-provider-nixos/default.nix b/pkgs/applications/networking/cluster/terraform-provider-nixos/default.nix
index 135e5402929a..f4ad171c267e 100644
--- a/pkgs/applications/networking/cluster/terraform-provider-nixos/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-provider-nixos/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 buildGoPackage rec {
   name = "terraform-provider-nixos-${version}";
   version = "0.0.1";
diff --git a/pkgs/applications/networking/cluster/terraform/default.nix b/pkgs/applications/networking/cluster/terraform/default.nix
index fbcb6c8be40d..358a1f23147a 100644
--- a/pkgs/applications/networking/cluster/terraform/default.nix
+++ b/pkgs/applications/networking/cluster/terraform/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildEnv, buildGoPackage, fetchpatch, fetchFromGitHub, makeWrapper }:
+{ stdenv, lib, buildEnv, buildGoPackage, fetchFromGitHub, makeWrapper }:
 
 let
   goPackagePath = "github.com/hashicorp/terraform";
@@ -75,7 +75,7 @@ let
             });
     in withPlugins (_: []);
 
-  plugins = import ./providers { inherit stdenv lib buildGoPackage fetchFromGitHub; };
+  plugins = import ./providers { inherit lib buildGoPackage fetchFromGitHub; };
 in rec {
   terraform_0_8_5 = generic {
     version = "0.8.5";
diff --git a/pkgs/applications/networking/cluster/terraform/providers/default.nix b/pkgs/applications/networking/cluster/terraform/providers/default.nix
index 40117b458550..cf1649f7bb39 100644
--- a/pkgs/applications/networking/cluster/terraform/providers/default.nix
+++ b/pkgs/applications/networking/cluster/terraform/providers/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 let
   list = import ./data.nix;
 
diff --git a/pkgs/applications/networking/compactor/default.nix b/pkgs/applications/networking/compactor/default.nix
index 749b94f7b7ec..d2b1a8eba367 100644
--- a/pkgs/applications/networking/compactor/default.nix
+++ b/pkgs/applications/networking/compactor/default.nix
@@ -1,4 +1,4 @@
-{ autoconf, automake, boost, cbor-diag, cddl, fetchFromGitHub, file, gcc, libpcap, libtins, libtool, lzma, openssl, pkgconfig, stdenv, tcpdump, wireshark-cli }:
+{ autoconf, automake, boost, cbor-diag, cddl, fetchFromGitHub, file, libpcap, libtins, libtool, lzma, openssl, pkgconfig, stdenv, tcpdump, wireshark-cli }:
 
 stdenv.mkDerivation rec {
   name = "compactor-${version}";
diff --git a/pkgs/applications/networking/drive/default.nix b/pkgs/applications/networking/drive/default.nix
index 826452016e73..113d6a2e5f46 100644
--- a/pkgs/applications/networking/drive/default.nix
+++ b/pkgs/applications/networking/drive/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "drive-${version}";
diff --git a/pkgs/applications/networking/instant-messengers/bitlbee-facebook/default.nix b/pkgs/applications/networking/instant-messengers/bitlbee-facebook/default.nix
index 9793fd234a18..aa7895ce1488 100644
--- a/pkgs/applications/networking/instant-messengers/bitlbee-facebook/default.nix
+++ b/pkgs/applications/networking/instant-messengers/bitlbee-facebook/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, fetchFromGitHub, stdenv, bitlbee, autoconf, automake, libtool, pkgconfig, glib, json-glib }:
+{ fetchFromGitHub, stdenv, bitlbee, autoconf, automake, libtool, pkgconfig, glib, json-glib }:
 
 with stdenv.lib;
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/networking/instant-messengers/bitlbee-steam/default.nix b/pkgs/applications/networking/instant-messengers/bitlbee-steam/default.nix
index 1477d0674642..a034827c4ed4 100644
--- a/pkgs/applications/networking/instant-messengers/bitlbee-steam/default.nix
+++ b/pkgs/applications/networking/instant-messengers/bitlbee-steam/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, fetchFromGitHub, stdenv, bitlbee, autoconf, automake, libtool, pkgconfig, glib, libgcrypt }:
+{ fetchFromGitHub, stdenv, bitlbee, autoconf, automake, libtool, pkgconfig, glib, libgcrypt }:
 
 with stdenv.lib;
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/networking/instant-messengers/bitlbee/default.nix b/pkgs/applications/networking/instant-messengers/bitlbee/default.nix
index 0b2a97b53786..2ed7fbcee3b5 100644
--- a/pkgs/applications/networking/instant-messengers/bitlbee/default.nix
+++ b/pkgs/applications/networking/instant-messengers/bitlbee/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, fetchpatch, stdenv, gnutls, glib, pkgconfig, check, libotr, python,
+{ fetchurl, stdenv, gnutls, glib, pkgconfig, check, libotr, python,
 enableLibPurple ? false, pidgin ? null }:
 
 with stdenv.lib;
diff --git a/pkgs/applications/networking/instant-messengers/ekiga/default.nix b/pkgs/applications/networking/instant-messengers/ekiga/default.nix
index 003ffbfc7d1e..f831ac0847ce 100644
--- a/pkgs/applications/networking/instant-messengers/ekiga/default.nix
+++ b/pkgs/applications/networking/instant-messengers/ekiga/default.nix
@@ -1,7 +1,7 @@
 { stdenv, glib, fetchurl, fetchpatch, cyrus_sasl, gettext, openldap, ptlib, opal, libXv, rarian, intltool
 , perl, perlXMLParser, evolution-data-server, gnome-doc-utils, avahi, autoreconfHook
 , libsigcxx, gtk, dbus-glib, libnotify, libXext, xextproto, gnome3, boost, libsecret
-, pkgconfig, libxml2, videoproto, unixODBC, db, nspr, nss, zlib, hicolor-icon-theme
+, pkgconfig, libxml2, videoproto, unixODBC, db, nspr, nss, zlib
 , libXrandr, randrproto, which, libxslt, libtasn1, gmp, nettle, sqlite, makeWrapper }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/networking/instant-messengers/linphone/default.nix b/pkgs/applications/networking/instant-messengers/linphone/default.nix
index e0aecd2c8102..1b257ea61dce 100644
--- a/pkgs/applications/networking/instant-messengers/linphone/default.nix
+++ b/pkgs/applications/networking/instant-messengers/linphone/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, intltool, pkgconfig, readline, openldap, cyrus_sasl, libupnp
+{ stdenv, intltool, pkgconfig, readline, openldap, cyrus_sasl, libupnp
 , zlib, libxml2, gtk2, libnotify, speex, ffmpeg, libX11, libsoup, udev
 , ortp, mediastreamer, sqlite, belle-sip, libosip, libexosip, bzrtp
 , mediastreamer-openh264, bctoolbox, makeWrapper, fetchFromGitHub, cmake
diff --git a/pkgs/applications/networking/instant-messengers/mikutter/default.nix b/pkgs/applications/networking/instant-messengers/mikutter/default.nix
index 6b17eb0a8975..3c267e612a68 100644
--- a/pkgs/applications/networking/instant-messengers/mikutter/default.nix
+++ b/pkgs/applications/networking/instant-messengers/mikutter/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl
-, bundlerEnv, ruby, pkgconfig
+, bundlerEnv, ruby
 , alsaUtils, libnotify, which, wrapGAppsHook, gtk2
 }:
 
diff --git a/pkgs/applications/networking/instant-messengers/pidgin/wrapper.nix b/pkgs/applications/networking/instant-messengers/pidgin/wrapper.nix
index 914b3480a95d..095f838fe981 100644
--- a/pkgs/applications/networking/instant-messengers/pidgin/wrapper.nix
+++ b/pkgs/applications/networking/instant-messengers/pidgin/wrapper.nix
@@ -1,4 +1,4 @@
-{ stdenv, symlinkJoin, pidgin, makeWrapper, plugins }:
+{ symlinkJoin, pidgin, makeWrapper, plugins }:
 
 let
 extraArgs = map (x: x.wrapArgs or "") plugins;
diff --git a/pkgs/applications/networking/instant-messengers/pond/default.nix b/pkgs/applications/networking/instant-messengers/pond/default.nix
index 5d463648bd8b..e7527bafcc65 100644
--- a/pkgs/applications/networking/instant-messengers/pond/default.nix
+++ b/pkgs/applications/networking/instant-messengers/pond/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, lib, buildGoPackage, trousers, dclxvi, wrapGAppsHook, pkgconfig, gtk3, gtkspell3,
-  fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, trousers, dclxvi, wrapGAppsHook, pkgconfig, gtk3, gtkspell3,
+  fetchgit }:
 
 let
   gui = true; # Might be implemented with nixpkgs config.
diff --git a/pkgs/applications/networking/instant-messengers/psi/default.nix b/pkgs/applications/networking/instant-messengers/psi/default.nix
index 7fabfa5f7722..37d9de8794e5 100644
--- a/pkgs/applications/networking/instant-messengers/psi/default.nix
+++ b/pkgs/applications/networking/instant-messengers/psi/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, enchant, qt4, zlib, sox, libX11, xproto, libSM
-, libICE, qca2, pkgconfig, callPackage, which, glib
+, libICE, qca2, pkgconfig, which, glib
 , libXScrnSaver, scrnsaverproto
 }:
 
diff --git a/pkgs/applications/networking/instant-messengers/ricochet/default.nix b/pkgs/applications/networking/instant-messengers/ricochet/default.nix
index c99130f28a39..a6aef5e6a2fb 100644
--- a/pkgs/applications/networking/instant-messengers/ricochet/default.nix
+++ b/pkgs/applications/networking/instant-messengers/ricochet/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, makeDesktopItem, unzip
+{ stdenv, fetchurl, pkgconfig, makeDesktopItem
 , qtbase, qttools, qtmultimedia, qtquick1, qtquickcontrols
 , openssl, protobuf, qmake
 }:
diff --git a/pkgs/applications/networking/instant-messengers/ring-daemon/default.nix b/pkgs/applications/networking/instant-messengers/ring-daemon/default.nix
index 024902a9c486..f858bb38dd19 100644
--- a/pkgs/applications/networking/instant-messengers/ring-daemon/default.nix
+++ b/pkgs/applications/networking/instant-messengers/ring-daemon/default.nix
@@ -30,7 +30,6 @@
 , openssl
 , perl
 , python3
-, bash
 , libupnp
 , speexdsp
 , fetchFromGitHub
diff --git a/pkgs/applications/networking/instant-messengers/riot/riot-web.nix b/pkgs/applications/networking/instant-messengers/riot/riot-web.nix
index dbf17d9cbdb1..37ce34f09df8 100644
--- a/pkgs/applications/networking/instant-messengers/riot/riot-web.nix
+++ b/pkgs/applications/networking/instant-messengers/riot/riot-web.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, fetchpatch, writeText, conf ? null }:
+{ lib, stdenv, fetchurl, writeText, conf ? null }:
 
 let configFile = writeText "riot-config.json" conf; in
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/networking/instant-messengers/slack/default.nix b/pkgs/applications/networking/instant-messengers/slack/default.nix
index 32648ee34c90..7f7245152b75 100644
--- a/pkgs/applications/networking/instant-messengers/slack/default.nix
+++ b/pkgs/applications/networking/instant-messengers/slack/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchurl, dpkg, makeWrapper
 , alsaLib, atk, cairo, cups, curl, dbus, expat, fontconfig, freetype, glib
 , gnome3, gtk3, gdk_pixbuf, libnotify, libxcb, nspr, nss, pango
-, systemd, wget, xorg }:
+, systemd, xorg }:
 
 let
 
diff --git a/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix b/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix
index 9354ae728218..39d664805fa9 100644
--- a/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix
+++ b/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix
@@ -1,4 +1,4 @@
-{ qt5, stdenv }:
+{ qt5 }:
 
 let
   mkTelegram = args: qt5.callPackage (import ./generic.nix args) { };
diff --git a/pkgs/applications/networking/instant-messengers/utox/default.nix b/pkgs/applications/networking/instant-messengers/utox/default.nix
index e139904fee53..5955ecb60bd9 100644
--- a/pkgs/applications/networking/instant-messengers/utox/default.nix
+++ b/pkgs/applications/networking/instant-messengers/utox/default.nix
@@ -1,6 +1,6 @@
 { stdenv, lib, fetchFromGitHub, check, cmake, pkgconfig
 , libtoxcore, filter-audio, dbus, libvpx, libX11, openal, freetype, libv4l
-, libXrender, fontconfig, libXext, libXft, utillinux, libsodium, libopus }:
+, libXrender, fontconfig, libXext, libXft, libsodium, libopus }:
 
 stdenv.mkDerivation rec {
   name = "utox-${version}";
diff --git a/pkgs/applications/networking/instant-messengers/vacuum/default.nix b/pkgs/applications/networking/instant-messengers/vacuum/default.nix
index 9ed954cc7ec2..9d5d5c1b80fc 100644
--- a/pkgs/applications/networking/instant-messengers/vacuum/default.nix
+++ b/pkgs/applications/networking/instant-messengers/vacuum/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub
+{ stdenv, fetchFromGitHub
   , qt4, qmake4Hook, openssl
   , xproto, libX11, libXScrnSaver, scrnsaverproto
   , xz, zlib
diff --git a/pkgs/applications/networking/irc/irssi/otr/default.nix b/pkgs/applications/networking/irc/irssi/otr/default.nix
index 8d7bf677983c..add4fa632c91 100644
--- a/pkgs/applications/networking/irc/irssi/otr/default.nix
+++ b/pkgs/applications/networking/irc/irssi/otr/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub, libotr, automake, autoconf, libtool, glib, pkgconfig, irssi }:
+{ stdenv, fetchFromGitHub, libotr, automake, autoconf, libtool, glib, pkgconfig, irssi }:
 
 with stdenv.lib;
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/networking/irc/weechat/default.nix b/pkgs/applications/networking/irc/weechat/default.nix
index a672fa73c4f0..dcd16c7c5b2b 100644
--- a/pkgs/applications/networking/irc/weechat/default.nix
+++ b/pkgs/applications/networking/irc/weechat/default.nix
@@ -1,8 +1,8 @@
-{ stdenv, fetchurl, fetchpatch, lib
+{ stdenv, fetchurl, lib
 , ncurses, openssl, aspell, gnutls
 , zlib, curl, pkgconfig, libgcrypt
 , cmake, makeWrapper, libobjc, libresolv, libiconv
-, writeScriptBin, symlinkJoin # for withPlugins
+, writeScriptBin # for withPlugins
 , asciidoctor # manpages
 , guileSupport ? true, guile
 , luaSupport ? true, lua5
diff --git a/pkgs/applications/networking/mailreaders/alpine/default.nix b/pkgs/applications/networking/mailreaders/alpine/default.nix
index 3b45c2fd4456..bb62014c77a4 100644
--- a/pkgs/applications/networking/mailreaders/alpine/default.nix
+++ b/pkgs/applications/networking/mailreaders/alpine/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, ncurses, tcl, openssl, pam, pkgconfig, gettext, kerberos
+{stdenv, fetchurl, ncurses, tcl, openssl, pam, kerberos
 , openldap
 }:
 
diff --git a/pkgs/applications/networking/mailreaders/mailnag/default.nix b/pkgs/applications/networking/mailreaders/mailnag/default.nix
index 75f34952394e..2b62db069bc9 100644
--- a/pkgs/applications/networking/mailreaders/mailnag/default.nix
+++ b/pkgs/applications/networking/mailreaders/mailnag/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, gettext, gtk3, pythonPackages
 , gdk_pixbuf, libnotify, gst_all_1
-, libgnome-keyring3, networkmanager
+, libgnome-keyring3
 , wrapGAppsHook, gnome3
 # otherwise passwords are stored unencrypted
 , withGnomeKeyring ? true
diff --git a/pkgs/applications/networking/mailreaders/mailpile/default.nix b/pkgs/applications/networking/mailreaders/mailpile/default.nix
index 36dc94951d5c..0f11d9a6df05 100644
--- a/pkgs/applications/networking/mailreaders/mailpile/default.nix
+++ b/pkgs/applications/networking/mailreaders/mailpile/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, python2Packages, gnupg1orig, makeWrapper, openssl, git }:
+{ stdenv, fetchFromGitHub, python2Packages, gnupg1orig, openssl, git }:
 
 python2Packages.buildPythonApplication rec {
   name = "mailpile-${version}";
diff --git a/pkgs/applications/networking/mailreaders/msgviewer/default.nix b/pkgs/applications/networking/mailreaders/msgviewer/default.nix
index 487b2799b980..6e2e8d58c676 100644
--- a/pkgs/applications/networking/mailreaders/msgviewer/default.nix
+++ b/pkgs/applications/networking/mailreaders/msgviewer/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, makeWrapper, writeScript, unzip, jre }:
+{ stdenv, fetchurl, makeWrapper, unzip, jre }:
 
 let
   version = "1.9";
diff --git a/pkgs/applications/networking/mailreaders/nylas-mail-bin/default.nix b/pkgs/applications/networking/mailreaders/nylas-mail-bin/default.nix
index 766aab39ce30..e7e199155d73 100644
--- a/pkgs/applications/networking/mailreaders/nylas-mail-bin/default.nix
+++ b/pkgs/applications/networking/mailreaders/nylas-mail-bin/default.nix
@@ -1,4 +1,4 @@
-{ dpkg, fetchurl, lib, pkgs, stdenv, config
+{ dpkg, fetchurl, lib, pkgs, stdenv
 , alsaLib
 , atk
 , cairo
@@ -13,7 +13,6 @@
 , gdk_pixbuf
 , glib
 , gnome2
-, libgcrypt
 , libgnome-keyring
 , libnotify
 , makeWrapper
diff --git a/pkgs/applications/networking/mailreaders/realpine/default.nix b/pkgs/applications/networking/mailreaders/realpine/default.nix
index 728287f8c75a..713f585d283c 100644
--- a/pkgs/applications/networking/mailreaders/realpine/default.nix
+++ b/pkgs/applications/networking/mailreaders/realpine/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, ncurses, tcl, openssl, pam, pkgconfig, gettext, kerberos
+{stdenv, fetchurl, ncurses, tcl, openssl, pam, kerberos
 , openldap
 }:
 # NOTE: Please check if any changes here are applicable to ../alpine/ as well
diff --git a/pkgs/applications/networking/mailreaders/sup/default.nix b/pkgs/applications/networking/mailreaders/sup/default.nix
index b7ac621eb6db..06777916b92a 100644
--- a/pkgs/applications/networking/mailreaders/sup/default.nix
+++ b/pkgs/applications/networking/mailreaders/sup/default.nix
@@ -1,5 +1,4 @@
-{ stdenv, lib, bundlerEnv, gpgme, ruby, ncurses, writeText, zlib, xapian
-, pkgconfig, which }:
+{ lib, bundlerEnv, ruby }:
 
 bundlerEnv {
   name = "sup-0.22.1";
diff --git a/pkgs/applications/networking/mailreaders/thunderbird/default.nix b/pkgs/applications/networking/mailreaders/thunderbird/default.nix
index 921611644858..85c98742af38 100644
--- a/pkgs/applications/networking/mailreaders/thunderbird/default.nix
+++ b/pkgs/applications/networking/mailreaders/thunderbird/default.nix
@@ -3,7 +3,7 @@
 , freetype, fontconfig, file, nspr, nss, libnotify
 , yasm, libGLU_combined, sqlite, unzip
 , hunspell, libevent, libstartup_notification
-, cairo, gstreamer, gst-plugins-base, icu, libpng, jemalloc
+, icu, libpng, jemalloc
 , autoconf213, which, m4
 , writeScript, xidel, common-updater-scripts, coreutils, gnused, gnugrep, curl
 , enableGTK3 ? false, gtk3, gnome3, wrapGAppsHook, makeWrapper
diff --git a/pkgs/applications/networking/newsreaders/pan/default.nix b/pkgs/applications/networking/newsreaders/pan/default.nix
index 916bd36ba54c..4a1940ae6545 100644
--- a/pkgs/applications/networking/newsreaders/pan/default.nix
+++ b/pkgs/applications/networking/newsreaders/pan/default.nix
@@ -1,6 +1,6 @@
 { spellChecking ? true
 , stdenv, fetchurl, pkgconfig, gtk3, gtkspell3 ? null
-, perl, pcre, gmime2, gettext, intltool, itstool, libxml2, dbus-glib, libnotify, gnutls
+, perl, gmime2, gettext, intltool, itstool, libxml2, dbus-glib, libnotify, gnutls
 , makeWrapper, gnupg
 , gnomeSupport ? true, libgnome-keyring3
 }:
diff --git a/pkgs/applications/networking/owamp/default.nix b/pkgs/applications/networking/owamp/default.nix
index 293c67164835..9ed532acfe1a 100644
--- a/pkgs/applications/networking/owamp/default.nix
+++ b/pkgs/applications/networking/owamp/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, fetchFromGitHub
+{stdenv, fetchFromGitHub
 , autoconf, automake, mandoc }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/networking/p2p/frostwire/default.nix b/pkgs/applications/networking/p2p/frostwire/default.nix
index 8cb5f768f956..7b854fce6c55 100644
--- a/pkgs/applications/networking/p2p/frostwire/default.nix
+++ b/pkgs/applications/networking/p2p/frostwire/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, gradle, perl, jre, makeWrapper, makeDesktopItem, mplayer }:
+{ stdenv, fetchFromGitHub, gradle, perl, jre, makeWrapper, makeDesktopItem, mplayer }:
 
 let
   version = "6.6.7-build-529";
diff --git a/pkgs/applications/networking/p2p/ktorrent/default.nix b/pkgs/applications/networking/p2p/ktorrent/default.nix
index 53485e95b9a6..c66c3ca05a4e 100644
--- a/pkgs/applications/networking/p2p/ktorrent/default.nix
+++ b/pkgs/applications/networking/p2p/ktorrent/default.nix
@@ -2,7 +2,7 @@
 , extra-cmake-modules, qtbase, qtscript
 , karchive, kcrash, kdnssd, ki18n, kio, knotifications, knotifyconfig
 , kdoctools, kross, kcmutils, kwindowsystem
-, libktorrent, boost, taglib, libgcrypt, kplotting
+, libktorrent, taglib, libgcrypt, kplotting
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/networking/p2p/retroshare/default.nix b/pkgs/applications/networking/p2p/retroshare/default.nix
index 950187ed9c60..34b4780633b8 100644
--- a/pkgs/applications/networking/p2p/retroshare/default.nix
+++ b/pkgs/applications/networking/p2p/retroshare/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, cmake, libupnp, gpgme, gnome3, glib, libssh, pkgconfig, protobuf, bzip2
+{ stdenv, fetchFromGitHub, libupnp, gpgme, gnome3, glib, libssh, pkgconfig, protobuf, bzip2
 , libXScrnSaver, speex, curl, libxml2, libxslt, sqlcipher, libmicrohttpd, opencv, qmake, ffmpeg
 , qtmultimedia, qtx11extras, qttools }:
 
diff --git a/pkgs/applications/networking/p2p/soulseekqt/default.nix b/pkgs/applications/networking/p2p/soulseekqt/default.nix
index 315106ea8525..e525c564c509 100644
--- a/pkgs/applications/networking/p2p/soulseekqt/default.nix
+++ b/pkgs/applications/networking/p2p/soulseekqt/default.nix
@@ -1,8 +1,8 @@
 { stdenv
 , fetchurl
 , dbus
-, expat, zlib, fontconfig
-, libpng, libX11, libxcb, libXau, libXdmcp, freetype, libbsd
+, zlib, fontconfig
+, libX11, libxcb, libXau, libXdmcp, freetype, libbsd
 }:
 
 with stdenv.lib;
diff --git a/pkgs/applications/networking/p2p/transmission/default.nix b/pkgs/applications/networking/p2p/transmission/default.nix
index d8fc1d840d2b..d9ddf0459216 100644
--- a/pkgs/applications/networking/p2p/transmission/default.nix
+++ b/pkgs/applications/networking/p2p/transmission/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, pkgconfig, intltool, file, wrapGAppsHook
+{ stdenv, fetchurl, pkgconfig, intltool, file, wrapGAppsHook
 , openssl, curl, libevent, inotify-tools, systemd, zlib
 , enableGTK3 ? false, gtk3
 , enableSystemd ? stdenv.isLinux
diff --git a/pkgs/applications/networking/p2p/tribler/default.nix b/pkgs/applications/networking/p2p/tribler/default.nix
index aa42af5ccbdd..1169dba188cd 100644
--- a/pkgs/applications/networking/p2p/tribler/default.nix
+++ b/pkgs/applications/networking/p2p/tribler/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pythonPackages, makeWrapper, nettools, libtorrentRasterbar, imagemagick
+{ stdenv, fetchurl, pythonPackages, makeWrapper, libtorrentRasterbar, imagemagick
 , enablePlayer ? true, vlc ? null, qt5 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/networking/pyload/default.nix b/pkgs/applications/networking/pyload/default.nix
index c331c4f287e6..6a89731ff104 100644
--- a/pkgs/applications/networking/pyload/default.nix
+++ b/pkgs/applications/networking/pyload/default.nix
@@ -1,5 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, pythonPackages, gocr, unrar, rhino, spidermonkey
-, pkgs }:
+{ stdenv, fetchFromGitHub, fetchpatch, pythonPackages, gocr, unrar, rhino, spidermonkey }:
 
 let
   beautifulsoup = pythonPackages.callPackage ./beautifulsoup.nix {
diff --git a/pkgs/applications/networking/remote/anydesk/default.nix b/pkgs/applications/networking/remote/anydesk/default.nix
index 19e85a9711d1..0f107936be6f 100644
--- a/pkgs/applications/networking/remote/anydesk/default.nix
+++ b/pkgs/applications/networking/remote/anydesk/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, fetchurl, autoPatchelfHook, makeWrapper, makeDesktopItem
-, atk, cairo, freetype, gdk_pixbuf, glib, gnome2, gtk2, libGLU_combined, pango, xorg
+{ stdenv, fetchurl, makeWrapper, makeDesktopItem
+, atk, cairo, gdk_pixbuf, glib, gnome2, gtk2, libGLU_combined, pango, xorg
 , lsb-release }:
 
 let
diff --git a/pkgs/applications/networking/remote/freerdp/legacy.nix b/pkgs/applications/networking/remote/freerdp/legacy.nix
index d3746fa6c7ad..9830b8465259 100644
--- a/pkgs/applications/networking/remote/freerdp/legacy.nix
+++ b/pkgs/applications/networking/remote/freerdp/legacy.nix
@@ -14,10 +14,9 @@
 , ffmpeg
 , libxkbfile
 #, xmlto, docbook_xml_dtd_412, docbook_xml_xslt
-, libXfixes
 , libXinerama
 , libXv
-, pulseaudioSupport ? true, libpulseaudio
+, pulseaudioSupport ? true
 }:
 
 assert printerSupport -> cups != null;
diff --git a/pkgs/applications/networking/remote/ssvnc/default.nix b/pkgs/applications/networking/remote/ssvnc/default.nix
index 1d1d6f4e1e3f..f20bb740615c 100644
--- a/pkgs/applications/networking/remote/ssvnc/default.nix
+++ b/pkgs/applications/networking/remote/ssvnc/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, imake, zlib, jdk, libX11, libXt, libXmu
-, libXaw, libXext, libXpm, openjpeg, openssl, tcl, tk, perl }:
+, libXaw, libXext, libXpm, openjpeg, openssl, tk, perl }:
 
 stdenv.mkDerivation rec {
   name = "ssvnc-${version}";
diff --git a/pkgs/applications/networking/remote/teamviewer/default.nix b/pkgs/applications/networking/remote/teamviewer/default.nix
index 5365228ae657..e4715cce8e18 100644
--- a/pkgs/applications/networking/remote/teamviewer/default.nix
+++ b/pkgs/applications/networking/remote/teamviewer/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, autoPatchelfHook, makeWrapper, xdg_utils, dbus, qtbase, qtwebkit, qtx11extras, qtquickcontrols, glibc, libXrandr, libX11 }:
+{ stdenv, fetchurl, autoPatchelfHook, makeWrapper, xdg_utils, dbus, qtbase, qtwebkit, qtx11extras, qtquickcontrols, glibc, libXrandr, libX11 }:
 
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/networking/remote/xrdp/default.nix b/pkgs/applications/networking/remote/xrdp/default.nix
index 3061467c82bd..a778042c2ea2 100644
--- a/pkgs/applications/networking/remote/xrdp/default.nix
+++ b/pkgs/applications/networking/remote/xrdp/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, pkgconfig, which, perl, autoconf, automake, libtool, openssl, systemd, pam, fuse, libjpeg, libopus, nasm, xorg }:
+{ stdenv, fetchFromGitHub, pkgconfig, which, perl, autoconf, automake, libtool, openssl, systemd, pam, fuse, libjpeg, libopus, nasm, xorg }:
 
 let
   xorgxrdp = stdenv.mkDerivation rec {
diff --git a/pkgs/applications/networking/seafile-client/default.nix b/pkgs/applications/networking/seafile-client/default.nix
index ea0a756e76d1..a1f1d50e5bee 100644
--- a/pkgs/applications/networking/seafile-client/default.nix
+++ b/pkgs/applications/networking/seafile-client/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, writeScript, pkgconfig, cmake, qtbase, qttools
+{ stdenv, fetchFromGitHub, pkgconfig, cmake, qtbase, qttools
 , seafile-shared, ccnet, makeWrapper
 , withShibboleth ? true, qtwebengine }:
 
diff --git a/pkgs/applications/networking/sniffers/wireshark/default.nix b/pkgs/applications/networking/sniffers/wireshark/default.nix
index ef1dade4dddd..5232704cd361 100644
--- a/pkgs/applications/networking/sniffers/wireshark/default.nix
+++ b/pkgs/applications/networking/sniffers/wireshark/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, lib, fetchurl, pkgconfig, pcre, perl, flex, bison, gettext, libpcap, libnl, c-ares
-, gnutls, libgcrypt, libgpgerror, geoip, openssl, lua5, makeDesktopItem, python, libcap, glib
+{ stdenv, fetchurl, pkgconfig, pcre, perl, flex, bison, gettext, libpcap, libnl, c-ares
+, gnutls, libgcrypt, libgpgerror, geoip, openssl, lua5, python, libcap, glib
 , libssh, zlib, cmake, extra-cmake-modules, fetchpatch, makeWrapper
 , withGtk ? false, gtk3 ? null, librsvg ? null, gsettings-desktop-schemas ? null, wrapGAppsHook ? null
 , withQt ? false, qt5 ? null
diff --git a/pkgs/applications/networking/super-productivity/default.nix b/pkgs/applications/networking/super-productivity/default.nix
index 251bef91360a..5519ba41ac7b 100644
--- a/pkgs/applications/networking/super-productivity/default.nix
+++ b/pkgs/applications/networking/super-productivity/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchurl, dpkg, makeWrapper
 , alsaLib, atk, cairo, cups, curl, dbus, expat, fontconfig, freetype, glib
 , gnome3, gtk3, gdk_pixbuf, libnotify, libxcb, nspr, nss, pango
-, systemd, wget, xorg, xprintidle-ng }:
+, systemd, xorg, xprintidle-ng }:
 
 let
 
diff --git a/pkgs/applications/networking/sync/backintime/qt4.nix b/pkgs/applications/networking/sync/backintime/qt4.nix
index b8f388c63eb5..26288f9f6e65 100644
--- a/pkgs/applications/networking/sync/backintime/qt4.nix
+++ b/pkgs/applications/networking/sync/backintime/qt4.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, makeWrapper, gettext, pkgconfig, libtool, backintime-common, python3, python3Packages }:
+{stdenv, makeWrapper, gettext, backintime-common, python3, python3Packages }:
 
 stdenv.mkDerivation rec {
   inherit (backintime-common) version src installFlags;
diff --git a/pkgs/applications/networking/sync/casync/default.nix b/pkgs/applications/networking/sync/casync/default.nix
index 82dd3a506dee..bea6a0780ed9 100644
--- a/pkgs/applications/networking/sync/casync/default.nix
+++ b/pkgs/applications/networking/sync/casync/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch
+{ stdenv, fetchFromGitHub
 , meson, ninja, pkgconfig, sphinx
 , acl, curl, fuse, libselinux, udev, xz, zstd
 , fuseSupport ? true
diff --git a/pkgs/applications/networking/sync/rsync/base.nix b/pkgs/applications/networking/sync/rsync/base.nix
index abc1f27e4f60..fc4bc6c0671e 100644
--- a/pkgs/applications/networking/sync/rsync/base.nix
+++ b/pkgs/applications/networking/sync/rsync/base.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch }:
+{ stdenv, fetchurl }:
 
 rec {
   version = "3.1.3";
diff --git a/pkgs/applications/networking/sync/rsync/default.nix b/pkgs/applications/networking/sync/rsync/default.nix
index f1e3f6b7301c..0b4d580cd209 100644
--- a/pkgs/applications/networking/sync/rsync/default.nix
+++ b/pkgs/applications/networking/sync/rsync/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, perl, libiconv, zlib, popt
+{ stdenv, fetchurl, perl, libiconv, zlib, popt
 , enableACLs ? true, acl ? null
 , enableCopyDevicesPatch ? false
 }:
@@ -6,7 +6,7 @@
 assert enableACLs -> acl != null;
 
 let
-  base = import ./base.nix { inherit stdenv fetchurl fetchpatch; };
+  base = import ./base.nix { inherit stdenv fetchurl; };
 in
 stdenv.mkDerivation rec {
   name = "rsync-${base.version}";
diff --git a/pkgs/applications/networking/sync/rsync/rrsync.nix b/pkgs/applications/networking/sync/rsync/rrsync.nix
index bc2a6eb9c3cb..e5c04798aab8 100644
--- a/pkgs/applications/networking/sync/rsync/rrsync.nix
+++ b/pkgs/applications/networking/sync/rsync/rrsync.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchurl, fetchpatch, perl, rsync }:
 
 let
-  base = import ./base.nix { inherit stdenv fetchurl fetchpatch; };
+  base = import ./base.nix { inherit stdenv fetchurl; };
 in
 stdenv.mkDerivation rec {
   name = "rrsync-${base.version}";
diff --git a/pkgs/applications/networking/znc/modules.nix b/pkgs/applications/networking/znc/modules.nix
index 4b68285c3f1a..a799df2d1ed0 100644
--- a/pkgs/applications/networking/znc/modules.nix
+++ b/pkgs/applications/networking/znc/modules.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub, znc }:
+{ stdenv, fetchFromGitHub, znc }:
 
 let
   zncDerivation = a@{
diff --git a/pkgs/applications/office/autokey/default.nix b/pkgs/applications/office/autokey/default.nix
index fdff39e27f90..0a6268f8452f 100644
--- a/pkgs/applications/office/autokey/default.nix
+++ b/pkgs/applications/office/autokey/default.nix
@@ -1,5 +1,5 @@
 { lib, python3Packages, fetchFromGitHub, wrapGAppsHook, gobjectIntrospection
-, gtksourceview, gnome3, libappindicator-gtk3, libnotify }:
+, gnome3, libappindicator-gtk3, libnotify }:
 
 python3Packages.buildPythonApplication rec {
   name = "autokey-${version}";
diff --git a/pkgs/applications/office/calligra/default.nix b/pkgs/applications/office/calligra/default.nix
index 80046ecb2cd5..a7c6165bdd2b 100644
--- a/pkgs/applications/office/calligra/default.nix
+++ b/pkgs/applications/office/calligra/default.nix
@@ -1,5 +1,5 @@
 {
-  mkDerivation, lib, fetchurl, fetchpatch, extra-cmake-modules, kdoctools, makeWrapper,
+  mkDerivation, lib, fetchurl, extra-cmake-modules, kdoctools, makeWrapper,
   boost, qtwebkit, qtx11extras, shared-mime-info,
   breeze-icons, kactivities, karchive, kcodecs, kcompletion, kconfig, kconfigwidgets,
   kcoreaddons, kdbusaddons, kdiagram, kguiaddons, khtml, ki18n,
diff --git a/pkgs/applications/office/impressive/default.nix b/pkgs/applications/office/impressive/default.nix
index 92feb6618c9e..8946bbab9316 100644
--- a/pkgs/applications/office/impressive/default.nix
+++ b/pkgs/applications/office/impressive/default.nix
@@ -1,5 +1,5 @@
 { fetchurl, stdenv, python2, makeWrapper, lib
-, libGLU_combined, SDL, freeglut, ghostscript, pdftk, dejavu_fonts }:
+, SDL, ghostscript, pdftk, dejavu_fonts }:
 
 let
   version = "0.12.0";
diff --git a/pkgs/applications/office/libreoffice/default.nix b/pkgs/applications/office/libreoffice/default.nix
index e3ff0b594b4e..43258282ac06 100644
--- a/pkgs/applications/office/libreoffice/default.nix
+++ b/pkgs/applications/office/libreoffice/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, pam, python3, libxslt, perl, ArchiveZip, gettext
-, CompressZlib, zlib, libjpeg, expat, pkgconfigUpstream, freetype, libwpd
+, CompressZlib, zlib, libjpeg, expat, freetype, libwpd
 , libxml2, db, sablotron, curl, fontconfig, libsndfile, neon
 , bison, flex, zip, unzip, gtk3, gtk2, libmspack, getopt, file, cairo, which
 , icu, boost, jdk, ant, cups, xorg, libcmis
@@ -8,7 +8,7 @@
 , autoconf, automake, openldap, bash, hunspell, librdf_redland, nss, nspr
 , libwpg, dbus-glib, glibc, qt4, clucene_core, libcdr, lcms, vigra
 , unixODBC, mdds, sane-backends, mythes, libexttextcat, libvisio
-, fontsConf, pkgconfig, libzip, bluez5, libtool, maven, carlito
+, fontsConf, pkgconfig, bluez5, libtool, carlito
 , libatomic_ops, graphite2, harfbuzz, libodfgen, libzmf
 , librevenge, libe-book, libmwaw, glm, glew, gst_all_1
 , gdb, commonsLogging, librdf_rasqal, wrapGAppsHook
diff --git a/pkgs/applications/office/libreoffice/still.nix b/pkgs/applications/office/libreoffice/still.nix
index dbfeb0f2fe86..7a2538e4bcd6 100644
--- a/pkgs/applications/office/libreoffice/still.nix
+++ b/pkgs/applications/office/libreoffice/still.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, pam, python3, libxslt, perl, ArchiveZip
-, CompressZlib, zlib, libjpeg, expat, pkgconfigUpstream, freetype, libwpd
+, CompressZlib, zlib, libjpeg, expat, freetype, libwpd
 , libxml2, db, sablotron, curl, fontconfig, libsndfile, neon
 , bison, flex, zip, unzip, gtk3, gtk2, libmspack, getopt, file, cairo, which
 , icu, boost, jdk, ant, cups, xorg, libcmis, carlito
@@ -8,7 +8,7 @@
 , autoconf, automake, openldap, bash, hunspell, librdf_redland, nss, nspr
 , libwpg, dbus-glib, glibc, qt4, clucene_core, libcdr, lcms, vigra
 , unixODBC, mdds, sane-backends, mythes, libexttextcat, libvisio
-, fontsConf, pkgconfig, libzip, bluez5, libtool, maven
+, fontsConf, pkgconfig, bluez5, libtool
 , libatomic_ops, graphite2, harfbuzz, libodfgen, libzmf
 , librevenge, libe-book, libmwaw, glm, glew, gst_all_1
 , gdb, commonsLogging, librdf_rasqal, wrapGAppsHook
diff --git a/pkgs/applications/office/moneyplex/default.nix b/pkgs/applications/office/moneyplex/default.nix
index 31de4db76f1a..47d2ecc81ea3 100644
--- a/pkgs/applications/office/moneyplex/default.nix
+++ b/pkgs/applications/office/moneyplex/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, patchelf, libredirect, coreutils, pcsclite
+{ stdenv, fetchurl, patchelf, coreutils, pcsclite
 , zlib, glib, gdk_pixbuf, gtk2, cairo, pango, libX11, atk, openssl }:
 
 let
diff --git a/pkgs/applications/office/timetrap/default.nix b/pkgs/applications/office/timetrap/default.nix
index 3564454a6741..20dd27fa2873 100644
--- a/pkgs/applications/office/timetrap/default.nix
+++ b/pkgs/applications/office/timetrap/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, bundlerEnv, ruby }:
+{ lib, bundlerEnv, ruby }:
 
 bundlerEnv rec {
   name = "timetrap-${version}";
diff --git a/pkgs/applications/office/trytond/default.nix b/pkgs/applications/office/trytond/default.nix
index d1b3cb1b1a17..59c58a3af13a 100644
--- a/pkgs/applications/office/trytond/default.nix
+++ b/pkgs/applications/office/trytond/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, python2Packages
+{ stdenv, python2Packages
 , withPostgresql ? true }:
 
 with stdenv.lib;
diff --git a/pkgs/applications/office/wpsoffice/default.nix b/pkgs/applications/office/wpsoffice/default.nix
index a55a98b1f5eb..46faf9ba651e 100644
--- a/pkgs/applications/office/wpsoffice/default.nix
+++ b/pkgs/applications/office/wpsoffice/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub
+{ stdenv, fetchurl
 , libX11, glib, xorg, fontconfig, freetype
 , zlib, libpng12, libICE, libXrender, cups }:
 
diff --git a/pkgs/applications/office/zim/default.nix b/pkgs/applications/office/zim/default.nix
index 9f7048f36462..26a141dc5067 100644
--- a/pkgs/applications/office/zim/default.nix
+++ b/pkgs/applications/office/zim/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, python2Packages }:
+{ stdenv, fetchurl, python2Packages }:
 
 #
 # TODO: Declare configuration options for the following optional dependencies:
diff --git a/pkgs/applications/science/astronomy/celestia/default.nix b/pkgs/applications/science/astronomy/celestia/default.nix
index 589625cc18f9..e3ceffd34c19 100644
--- a/pkgs/applications/science/astronomy/celestia/default.nix
+++ b/pkgs/applications/science/astronomy/celestia/default.nix
@@ -1,6 +1,5 @@
 { stdenv, fetchurl, freeglut, gtk2, gtkglext, libjpeg_turbo, libtheora, libXmu
-, lua, libGLU_combined, pkgconfig, perl, autoreconfHook, glib, cairo
-, pango, gdk_pixbuf, atk
+, lua, libGLU_combined, pkgconfig, perl, autoreconfHook
 }:
 
 let
diff --git a/pkgs/applications/science/astronomy/stellarium/default.nix b/pkgs/applications/science/astronomy/stellarium/default.nix
index 111608126718..24d6246e90cd 100644
--- a/pkgs/applications/science/astronomy/stellarium/default.nix
+++ b/pkgs/applications/science/astronomy/stellarium/default.nix
@@ -1,5 +1,5 @@
 { mkDerivation, lib, fetchFromGitHub
-, cmake, freetype, libpng, libGLU_combined, gettext, openssl, perl, libiconv
+, cmake, freetype, libpng, libGLU_combined, openssl, perl, libiconv
 , qtscript, qtserialport, qttools
 , qtmultimedia, qtlocation, makeWrapper, qtbase
 }:
diff --git a/pkgs/applications/science/biology/diamond/default.nix b/pkgs/applications/science/biology/diamond/default.nix
index a45e5df2f528..854e91b2fcbb 100644
--- a/pkgs/applications/science/biology/diamond/default.nix
+++ b/pkgs/applications/science/biology/diamond/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, cmake, gcc, zlib }:
+{ stdenv, fetchurl, cmake, zlib }:
 
 stdenv.mkDerivation rec {
   name = "diamond-0.8.36";
diff --git a/pkgs/applications/science/biology/freebayes/default.nix b/pkgs/applications/science/biology/freebayes/default.nix
index 99d2dfa55ddd..1a15dcf6197d 100644
--- a/pkgs/applications/science/biology/freebayes/default.nix
+++ b/pkgs/applications/science/biology/freebayes/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, cmake, gcc, zlib, bzip2, lzma }:
+{ stdenv, fetchFromGitHub, zlib, bzip2, lzma }:
 
 stdenv.mkDerivation rec {
   name    = "freebayes-${version}";
diff --git a/pkgs/applications/science/biology/mosdepth/default.nix b/pkgs/applications/science/biology/mosdepth/default.nix
index 05cd7992aa90..4b4920a6ca3a 100644
--- a/pkgs/applications/science/biology/mosdepth/default.nix
+++ b/pkgs/applications/science/biology/mosdepth/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchFromGitHub, nim, htslib, patchelf, pcre}:
+{stdenv, fetchFromGitHub, nim, htslib, pcre}:
 
 let
   hts-nim = fetchFromGitHub {
diff --git a/pkgs/applications/science/biology/raxml/default.nix b/pkgs/applications/science/biology/raxml/default.nix
index efe19a4e2b6e..140f70323194 100644
--- a/pkgs/applications/science/biology/raxml/default.nix
+++ b/pkgs/applications/science/biology/raxml/default.nix
@@ -1,6 +1,5 @@
 { stdenv
 , fetchFromGitHub
-, zlib
 , pkgs
 , mpi ? false
 }:
diff --git a/pkgs/applications/science/biology/vcftools/default.nix b/pkgs/applications/science/biology/vcftools/default.nix
index ab3050955df7..394973692dca 100755
--- a/pkgs/applications/science/biology/vcftools/default.nix
+++ b/pkgs/applications/science/biology/vcftools/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, htslib, zlib, autoreconfHook, pkgconfig, perl }:
+{ stdenv, fetchFromGitHub, zlib, autoreconfHook, pkgconfig, perl }:
 
 stdenv.mkDerivation rec {
   name = "${pname}-${version}";
diff --git a/pkgs/applications/science/electronics/adms/default.nix b/pkgs/applications/science/electronics/adms/default.nix
index 99b7ef79594f..236225959f7a 100644
--- a/pkgs/applications/science/electronics/adms/default.nix
+++ b/pkgs/applications/science/electronics/adms/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, libtool, autoreconfHook, flex, bison, gperf,
+{ stdenv, fetchFromGitHub, autoreconfHook, flex, bison, gperf,
   libxml2, perl, perlPackages, gd }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/science/electronics/bitscope/common.nix b/pkgs/applications/science/electronics/bitscope/common.nix
index ba2d5221cc51..64777b5a0ac8 100644
--- a/pkgs/applications/science/electronics/bitscope/common.nix
+++ b/pkgs/applications/science/electronics/bitscope/common.nix
@@ -2,14 +2,12 @@
 , buildFHSUserEnv
 , cairo
 , dpkg
-, fetchurl
 , gdk_pixbuf
 , glib
 , gtk2-x11
 , makeWrapper
 , pango
 , stdenv
-, writeTextFile
 , xorg
 }:
 
diff --git a/pkgs/applications/science/electronics/bitscope/packages.nix b/pkgs/applications/science/electronics/bitscope/packages.nix
index dc333f3d3b76..58e01f4f9f49 100644
--- a/pkgs/applications/science/electronics/bitscope/packages.nix
+++ b/pkgs/applications/science/electronics/bitscope/packages.nix
@@ -1,8 +1,5 @@
-{ buildFHSUserEnv
-, callPackage
+{ callPackage
 , fetchurl
-, makeWrapper
-, stdenv
 }:
 
 let
diff --git a/pkgs/applications/science/electronics/kicad/default.nix b/pkgs/applications/science/electronics/kicad/default.nix
index 8e98bad55c3d..e3244ec339ea 100644
--- a/pkgs/applications/science/electronics/kicad/default.nix
+++ b/pkgs/applications/science/electronics/kicad/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchbzr, cmake, libGLU_combined, wxGTK, zlib, libX11, gettext, glew, cairo, curl, openssl, boost, pkgconfig, doxygen }:
+{ stdenv, fetchurl, cmake, libGLU_combined, wxGTK, zlib, libX11, gettext, glew, cairo, curl, openssl, boost, pkgconfig, doxygen }:
 
 stdenv.mkDerivation rec {
   name = "kicad-${version}";
diff --git a/pkgs/applications/science/electronics/librepcb/default.nix b/pkgs/applications/science/electronics/librepcb/default.nix
index 48afb5bf9dc0..33eb52c18ee7 100644
--- a/pkgs/applications/science/electronics/librepcb/default.nix
+++ b/pkgs/applications/science/electronics/librepcb/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, qtbase, qttools, qmake, libGLU_combined, openssl, zlib }:
+{ stdenv, fetchFromGitHub, qtbase, qttools, qmake }:
 
 stdenv.mkDerivation rec {
   name = "librepcb-${version}";
diff --git a/pkgs/applications/science/logic/aspino/default.nix b/pkgs/applications/science/logic/aspino/default.nix
index 5e1a448a7cf9..d7a5e7b4c83f 100644
--- a/pkgs/applications/science/logic/aspino/default.nix
+++ b/pkgs/applications/science/logic/aspino/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub, zlib, boost, glucose }:
+{ stdenv, fetchurl, fetchFromGitHub, zlib, boost }:
 
 let
   glucose' = fetchurl {
diff --git a/pkgs/applications/science/logic/coq2html/default.nix b/pkgs/applications/science/logic/coq2html/default.nix
index 9687ac66ead1..a987bf1ba57e 100644
--- a/pkgs/applications/science/logic/coq2html/default.nix
+++ b/pkgs/applications/science/logic/coq2html/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, make, fetchgit, ocaml }:
+{ stdenv, make, fetchgit, ocaml }:
 
 let 
   version = "20170720";
diff --git a/pkgs/applications/science/logic/elan/default.nix b/pkgs/applications/science/logic/elan/default.nix
index ff737de0cc4f..2b7cb9c30fae 100644
--- a/pkgs/applications/science/logic/elan/default.nix
+++ b/pkgs/applications/science/logic/elan/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, pkgconfig, curl, openssl, zlib, fetchFromGitHub, rustPlatform }:
+{ stdenv, pkgconfig, curl, openssl, zlib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   name = "elan-${version}";
diff --git a/pkgs/applications/science/logic/hol_light/default.nix b/pkgs/applications/science/logic/hol_light/default.nix
index 8d7c11ee91b7..a1779baf5f82 100644
--- a/pkgs/applications/science/logic/hol_light/default.nix
+++ b/pkgs/applications/science/logic/hol_light/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, writeScript, ocaml, camlp5 }:
+{ stdenv, fetchFromGitHub, fetchpatch, ocaml, camlp5 }:
 
 let
   start_script = ''
diff --git a/pkgs/applications/science/logic/lean2/default.nix b/pkgs/applications/science/logic/lean2/default.nix
index 2b861b6d06d9..4e1415d3961d 100644
--- a/pkgs/applications/science/logic/lean2/default.nix
+++ b/pkgs/applications/science/logic/lean2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, cmake, gmp, mpfr, boost, python
+{ stdenv, fetchFromGitHub, cmake, gmp, mpfr, python
 , gperftools, ninja, makeWrapper }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/science/logic/mcrl2/default.nix b/pkgs/applications/science/logic/mcrl2/default.nix
index 6d9549b526f9..dc32e84279a8 100644
--- a/pkgs/applications/science/logic/mcrl2/default.nix
+++ b/pkgs/applications/science/logic/mcrl2/default.nix
@@ -1,5 +1,4 @@
-{stdenv, fetchurl, cmake, subversion, libGLU_combined, qt5, boost,
- python27, python27Packages}:
+{stdenv, fetchurl, cmake, libGLU_combined, qt5, boost}:
 
 stdenv.mkDerivation rec {
   version = "201707";
diff --git a/pkgs/applications/science/logic/saw-tools/default.nix b/pkgs/applications/science/logic/saw-tools/default.nix
index 949b34420b79..65d2b4d91c30 100644
--- a/pkgs/applications/science/logic/saw-tools/default.nix
+++ b/pkgs/applications/science/logic/saw-tools/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, gmp4, ncurses, zlib, makeWrapper, clang_35 }:
+{ stdenv, fetchurl, gmp4, ncurses, zlib, clang_35 }:
 
 let
   libPath = stdenv.lib.makeLibraryPath
diff --git a/pkgs/applications/science/logic/tamarin-prover/default.nix b/pkgs/applications/science/logic/tamarin-prover/default.nix
index fb37554b65fe..4efc384ed227 100644
--- a/pkgs/applications/science/logic/tamarin-prover/default.nix
+++ b/pkgs/applications/science/logic/tamarin-prover/default.nix
@@ -1,4 +1,4 @@
-{ haskell, haskellPackages, mkDerivation, fetchFromGitHub, lib
+{ haskellPackages, mkDerivation, fetchFromGitHub, lib
 # the following are non-haskell dependencies
 , makeWrapper, which, maude, graphviz, sapic
 }:
diff --git a/pkgs/applications/science/logic/tlaplus/tlaps.nix b/pkgs/applications/science/logic/tlaplus/tlaps.nix
index 9a78c1df8b17..7d35f5f91df3 100644
--- a/pkgs/applications/science/logic/tlaplus/tlaps.nix
+++ b/pkgs/applications/science/logic/tlaplus/tlaps.nix
@@ -1,8 +1,6 @@
-{ lib
-, fetchurl
-, makeWrapper
+{ fetchurl
 , stdenv
-, ocaml, gawk, isabelle, cvc3, perl, wget, which
+, ocaml, isabelle, cvc3, perl, wget, which
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/science/logic/workcraft/default.nix b/pkgs/applications/science/logic/workcraft/default.nix
index b677927a8eff..313fe5a9f1dd 100644
--- a/pkgs/applications/science/logic/workcraft/default.nix
+++ b/pkgs/applications/science/logic/workcraft/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, pkgs, fetchurl, jre, makeWrapper }:
+{ stdenv, fetchurl, jre, makeWrapper }:
 
 stdenv.mkDerivation rec {
   name = "workcraft-${version}";
diff --git a/pkgs/applications/science/machine-learning/torch/torch-distro.nix b/pkgs/applications/science/machine-learning/torch/torch-distro.nix
index 85a4aa02e441..9c4f24021430 100644
--- a/pkgs/applications/science/machine-learning/torch/torch-distro.nix
+++ b/pkgs/applications/science/machine-learning/torch/torch-distro.nix
@@ -1,6 +1,6 @@
-{ luarocks, lib , stdenv,  writeText , readline,  makeWrapper,
-  less, ncurses, cmake, openblas, coreutils, fetchgit, libuuid, czmq, openssl,
-  gnuplot, fetchurl, lua, src, libjpeg, libpng
+{ luarocks, lib , stdenv,  readline,  makeWrapper,
+  less, ncurses, cmake, coreutils, fetchgit, libuuid, czmq, openssl,
+  gnuplot, lua, src, libjpeg, libpng
 } :
 
 let
diff --git a/pkgs/applications/science/math/R/default.nix b/pkgs/applications/science/math/R/default.nix
index 25ebee96a103..913fac6ac128 100644
--- a/pkgs/applications/science/math/R/default.nix
+++ b/pkgs/applications/science/math/R/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchurl, bzip2, gfortran, libX11, libXmu, libXt, libjpeg, libpng
 , libtiff, ncurses, pango, pcre, perl, readline, tcl, texLive, tk, xz, zlib
 , less, texinfo, graphviz, icu, pkgconfig, bison, imake, which, jdk, openblas
-, curl, Cocoa, Foundation, cf-private, libobjc, libcxx, tzdata, fetchpatch
+, curl, Cocoa, Foundation, libobjc, libcxx, tzdata
 , withRecommendedPackages ? true
 , enableStrictBarrier ? false
 }:
diff --git a/pkgs/applications/science/math/cntk/default.nix b/pkgs/applications/science/math/cntk/default.nix
index 07740f4c8aea..fe5c77be8b22 100644
--- a/pkgs/applications/science/math/cntk/default.nix
+++ b/pkgs/applications/science/math/cntk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, fetchFromGitHub, fetchpatch, cmake
+{ lib, stdenv, fetchgit, fetchFromGitHub, cmake
 , openblas, opencv3, libzip, boost, protobuf, openmpi
 , onebitSGDSupport ? false
 , cudaSupport ? false, cudatoolkit, nvidia_x11
diff --git a/pkgs/applications/science/math/colpack/default.nix b/pkgs/applications/science/math/colpack/default.nix
index 29785363b048..e62df7f11cc7 100644
--- a/pkgs/applications/science/math/colpack/default.nix
+++ b/pkgs/applications/science/math/colpack/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, autoconf, automake, libtool, gettext }:
+{ stdenv, fetchFromGitHub, autoconf, automake, libtool, gettext }:
 
 stdenv.mkDerivation rec {
 
diff --git a/pkgs/applications/science/math/mathematica/10.nix b/pkgs/applications/science/math/mathematica/10.nix
index 6a49976c86b8..4884ee1f93ab 100644
--- a/pkgs/applications/science/math/mathematica/10.nix
+++ b/pkgs/applications/science/math/mathematica/10.nix
@@ -7,13 +7,11 @@
 , freetype
 , gcc
 , glib
-, libpng
 , ncurses
 , opencv
 , openssl
 , unixODBC
 , xorg
-, zlib
 , libxml2
 , libuuid
 }:
diff --git a/pkgs/applications/science/math/mathematica/9.nix b/pkgs/applications/science/math/mathematica/9.nix
index c4fd0c384c14..d60feb54695d 100644
--- a/pkgs/applications/science/math/mathematica/9.nix
+++ b/pkgs/applications/science/math/mathematica/9.nix
@@ -7,13 +7,11 @@
 , freetype
 , gcc
 , glib
-, libpng
 , ncurses
 , opencv
 , openssl
 , unixODBC
 , xorg
-, zlib
 }:
 
 let
diff --git a/pkgs/applications/science/math/mathematica/default.nix b/pkgs/applications/science/math/mathematica/default.nix
index d2a518e9db0b..fa4ff8b00687 100644
--- a/pkgs/applications/science/math/mathematica/default.nix
+++ b/pkgs/applications/science/math/mathematica/default.nix
@@ -8,7 +8,6 @@
 , freetype
 , gcc
 , glib
-, libpng
 , ncurses
 , opencv
 , openssl
diff --git a/pkgs/applications/science/math/sage/env-locations.nix b/pkgs/applications/science/math/sage/env-locations.nix
index 2ed079ab32bc..288ffd6e0e1a 100644
--- a/pkgs/applications/science/math/sage/env-locations.nix
+++ b/pkgs/applications/science/math/sage/env-locations.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, writeTextFile
+{ writeTextFile
 , pari_data
 , pari
 , singular
diff --git a/pkgs/applications/science/math/sage/openblas-pc.nix b/pkgs/applications/science/math/sage/openblas-pc.nix
index ba46850bbc61..f4669a6557e9 100644
--- a/pkgs/applications/science/math/sage/openblas-pc.nix
+++ b/pkgs/applications/science/math/sage/openblas-pc.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, openblasCompat
+{ openblasCompat
 , writeTextFile
 , name
 }:
diff --git a/pkgs/applications/science/math/sage/sage-with-env.nix b/pkgs/applications/science/math/sage/sage-with-env.nix
index 3d1ebe87c6b7..63b9772b8231 100644
--- a/pkgs/applications/science/math/sage/sage-with-env.nix
+++ b/pkgs/applications/science/math/sage/sage-with-env.nix
@@ -3,8 +3,6 @@
 , makeWrapper
 , sage-env
 , sage-src
-, sagelib
-, sagedoc
 , openblasCompat
 , openblas-blas-pc
 , openblas-cblas-pc
@@ -14,7 +12,6 @@
 , singular
 , libgap
 , gap-libgap-compatible
-, gcc
 , giac
 , maxima-ecl
 , pari
diff --git a/pkgs/applications/science/math/sage/sagedoc.nix b/pkgs/applications/science/math/sage/sagedoc.nix
index 7b280e9e0280..a594428a389a 100644
--- a/pkgs/applications/science/math/sage/sagedoc.nix
+++ b/pkgs/applications/science/math/sage/sagedoc.nix
@@ -1,7 +1,5 @@
-{ pkgs
-, stdenv
+{ stdenv
 , sage-src
-, env-locations
 , sage-with-env
 , sagelib
 , python2
diff --git a/pkgs/applications/science/math/sage/sagelib.nix b/pkgs/applications/science/math/sage/sagelib.nix
index a053d997bf9a..abcefba5e260 100644
--- a/pkgs/applications/science/math/sage/sagelib.nix
+++ b/pkgs/applications/science/math/sage/sagelib.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, sage-src
+{ sage-src
 , perl
 , buildPythonPackage
 , arb
diff --git a/pkgs/applications/science/math/scilab/default.nix b/pkgs/applications/science/math/scilab/default.nix
index fcdbb6b985d6..6063a45a3efb 100644
--- a/pkgs/applications/science/math/scilab/default.nix
+++ b/pkgs/applications/science/math/scilab/default.nix
@@ -1,6 +1,6 @@
 {stdenv, fetchurl, lib, gfortran
 , ncurses
-, Xaw3d, withXaw3d ? false
+, withXaw3d ? false
 #, withPVMlib ? false
 , tcl, tk, withTk ? false
 , gtk2, withGtk ? false # working ?
diff --git a/pkgs/applications/science/math/singular/default.nix b/pkgs/applications/science/math/singular/default.nix
index cec1a831c912..8be302f41e5e 100644
--- a/pkgs/applications/science/math/singular/default.nix
+++ b/pkgs/applications/science/math/singular/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, gmp, bison, perl, autoconf, ncurses, readline, coreutils, pkgconfig
+{ stdenv, fetchurl, gmp, bison, perl, ncurses, readline, coreutils, pkgconfig
 , autoreconfHook
 , file
 , flint
diff --git a/pkgs/applications/science/misc/gephi/default.nix b/pkgs/applications/science/misc/gephi/default.nix
index 3a0bcb66813e..b81f188a91bf 100644
--- a/pkgs/applications/science/misc/gephi/default.nix
+++ b/pkgs/applications/science/misc/gephi/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, callPackage, jdk, maven, javaPackages }:
+{ stdenv, fetchFromGitHub, jdk, maven, javaPackages }:
 
 let
   version = "0.9.2";
diff --git a/pkgs/applications/science/misc/golly/beta.nix b/pkgs/applications/science/misc/golly/beta.nix
index f423adbe7864..dc768725d4fb 100644
--- a/pkgs/applications/science/misc/golly/beta.nix
+++ b/pkgs/applications/science/misc/golly/beta.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, fetchgit
+{stdenv, fetchgit
 , wxGTK, perl, python2, zlib, libGLU_combined, libX11
 , automake, autoconf
 }:
diff --git a/pkgs/applications/science/misc/openmvg/default.nix b/pkgs/applications/science/misc/openmvg/default.nix
index 0f0c6aaf74da..c3e1cd60bf0b 100644
--- a/pkgs/applications/science/misc/openmvg/default.nix
+++ b/pkgs/applications/science/misc/openmvg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, pkgconfig, cmake
+{ stdenv, fetchgit, pkgconfig, cmake
 , libjpeg ? null
 , zlib ? null
 , libpng ? null
diff --git a/pkgs/applications/science/misc/openmvs/default.nix b/pkgs/applications/science/misc/openmvs/default.nix
index 4e5b986a428e..b665d5f4f687 100644
--- a/pkgs/applications/science/misc/openmvs/default.nix
+++ b/pkgs/applications/science/misc/openmvs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pkgconfig, cmake
+{ stdenv, fetchFromGitHub, pkgconfig, cmake
 , eigen, opencv, ceres-solver, cgal, boost, vcg
 , gmp, mpfr, glog, google-gflags, libjpeg_turbo }:
 
diff --git a/pkgs/applications/science/misc/root/default.nix b/pkgs/applications/science/misc/root/default.nix
index 00ca1d2c7abe..e966e798ae6d 100644
--- a/pkgs/applications/science/misc/root/default.nix
+++ b/pkgs/applications/science/misc/root/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, cmake, pcre, pkgconfig, python2
+{ stdenv, fetchurl, cmake, pcre, pkgconfig, python2
 , libX11, libXpm, libXft, libXext, libGLU_combined, zlib, libxml2, lz4, lzma, gsl, xxHash
 , Cocoa, OpenGL, noSplash ? false }:
 
diff --git a/pkgs/applications/science/robotics/gazebo/default.nix b/pkgs/applications/science/robotics/gazebo/default.nix
index babd87eb2b1d..98ccd92c4ee5 100644
--- a/pkgs/applications/science/robotics/gazebo/default.nix
+++ b/pkgs/applications/science/robotics/gazebo/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchurl, cmake, pkgconfig, boost, protobuf, freeimage
   , boost-build, boost_process
   , xorg_sys_opengl, tbb, ogre, tinyxml-2
-  , libtar, glxinfo,  libusb, libxslt, ruby, ignition
+  , libtar, glxinfo,  libusb, libxslt, ignition
   , pythonPackages, utillinux
 
   # these deps are hidden; cmake doesn't catch them
diff --git a/pkgs/applications/science/robotics/qgroundcontrol/default.nix b/pkgs/applications/science/robotics/qgroundcontrol/default.nix
index 95462c02eb5b..ce3317da9f8f 100644
--- a/pkgs/applications/science/robotics/qgroundcontrol/default.nix
+++ b/pkgs/applications/science/robotics/qgroundcontrol/default.nix
@@ -1,8 +1,8 @@
-{ stdenv, fetchgit, git,  espeak, SDL2, udev, doxygen, cmake
+{ stdenv, fetchgit, git,  SDL2, udev, doxygen
 , qtbase, qtlocation, qtserialport, qtdeclarative, qtconnectivity, qtxmlpatterns
 , qtsvg, qtquick1, qtquickcontrols, qtgraphicaleffects, qmake, qtspeech
-, makeWrapper, lndir
-, gst_all_1, qt-gstreamer1, pkgconfig, glibc
+, makeWrapper
+, gst_all_1, pkgconfig
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/science/robotics/yarp/default.nix b/pkgs/applications/science/robotics/yarp/default.nix
index 98576cfd0917..507481cddab2 100644
--- a/pkgs/applications/science/robotics/yarp/default.nix
+++ b/pkgs/applications/science/robotics/yarp/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, pkgconfig, cmake, ace
+{ stdenv, fetchFromGitHub, cmake, ace
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/science/spyder/default.nix b/pkgs/applications/science/spyder/default.nix
index 4411d78cec21..0564f3de1b78 100644
--- a/pkgs/applications/science/spyder/default.nix
+++ b/pkgs/applications/science/spyder/default.nix
@@ -1,7 +1,7 @@
-{ stdenv, fetchPypi, unzip, buildPythonApplication, makeDesktopItem
+{ stdenv, fetchPypi, buildPythonApplication, makeDesktopItem
 # mandatory
 , numpydoc, qtconsole, qtawesome, jedi, pycodestyle, psutil
-, pyflakes, rope, sphinx, nbconvert, mccabe, pyopengl, cloudpickle
+, pyflakes, rope, nbconvert, mccabe, pyopengl, cloudpickle
 # optional
 , numpy ? null, scipy ? null, matplotlib ? null
 # optional
diff --git a/pkgs/applications/version-management/bazaar/tools.nix b/pkgs/applications/version-management/bazaar/tools.nix
index d6c65548c1f7..0ad3c6079acd 100644
--- a/pkgs/applications/version-management/bazaar/tools.nix
+++ b/pkgs/applications/version-management/bazaar/tools.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, makeWrapper, python2Packages, bazaar }:
+{ stdenv, fetchurl, python2Packages }:
 
 python2Packages.buildPythonApplication rec {
   name = "bzr-tools-${version}";
diff --git a/pkgs/applications/version-management/bitkeeper/default.nix b/pkgs/applications/version-management/bitkeeper/default.nix
index 06cfc90e65f1..26397380d57f 100644
--- a/pkgs/applications/version-management/bitkeeper/default.nix
+++ b/pkgs/applications/version-management/bitkeeper/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, perl, gperf, bison, groff
-, pkgconfig, libXft, fontconfig, pcre
-, libtomcrypt, libtommath, lz4, zlib }:
+, pkgconfig, libXft, pcre
+, libtomcrypt, libtommath, lz4 }:
 
 stdenv.mkDerivation rec {
   name = "bitkeeper-${version}";
diff --git a/pkgs/applications/version-management/git-and-tools/fast-export/default.nix b/pkgs/applications/version-management/git-and-tools/fast-export/default.nix
index 474faa30467b..88d1f07ee74b 100644
--- a/pkgs/applications/version-management/git-and-tools/fast-export/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/fast-export/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchgit, mercurial, coreutils, git, makeWrapper, subversion}:
+{stdenv, fetchgit, mercurial, makeWrapper, subversion}:
 
 with stdenv.lib;
 stdenv.mkDerivation {
diff --git a/pkgs/applications/version-management/git-and-tools/git-annex-remote-b2/default.nix b/pkgs/applications/version-management/git-and-tools/git-annex-remote-b2/default.nix
index 9f1d8e9d7171..4d0f33730e45 100644
--- a/pkgs/applications/version-management/git-and-tools/git-annex-remote-b2/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-annex-remote-b2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "git-annex-remote-b2-${version}";
diff --git a/pkgs/applications/version-management/git-and-tools/git-cola/default.nix b/pkgs/applications/version-management/git-and-tools/git-cola/default.nix
index 391ca26de257..9bccbdb5049b 100644
--- a/pkgs/applications/version-management/git-and-tools/git-cola/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-cola/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, pythonPackages, makeWrapper, gettext, git }:
+{ stdenv, fetchFromGitHub, pythonPackages, gettext, git }:
 
 let
   inherit (pythonPackages) buildPythonApplication pyqt5 sip pyinotify python mock;
diff --git a/pkgs/applications/version-management/git-and-tools/git-dit/default.nix b/pkgs/applications/version-management/git-and-tools/git-dit/default.nix
index 654576a29e80..9c362276383c 100644
--- a/pkgs/applications/version-management/git-and-tools/git-dit/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-dit/default.nix
@@ -1,7 +1,6 @@
 { stdenv
 , fetchFromGitHub
 , openssl
-, gcc
 , zlib
 , libssh
 , cmake
diff --git a/pkgs/applications/version-management/git-and-tools/git-fame/default.nix b/pkgs/applications/version-management/git-and-tools/git-fame/default.nix
index 8b77efd1be23..9ca7a67a53e7 100644
--- a/pkgs/applications/version-management/git-and-tools/git-fame/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-fame/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, bundlerEnv, ruby, fetchFromGitHub, makeWrapper, bundler }:
+{ stdenv, bundlerEnv, ruby }:
 
 bundlerEnv rec {
   inherit ruby;
diff --git a/pkgs/applications/version-management/git-and-tools/git-hub/default.nix b/pkgs/applications/version-management/git-and-tools/git-hub/default.nix
index 94143e652f95..ba126bb476c1 100644
--- a/pkgs/applications/version-management/git-and-tools/git-hub/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-hub/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, docutils, gitMinimal, python2Packages }:
+{ stdenv, fetchFromGitHub, gitMinimal, python2Packages }:
 
 stdenv.mkDerivation rec {
   name = "git-hub-${version}";
diff --git a/pkgs/applications/version-management/git-and-tools/hub/default.nix b/pkgs/applications/version-management/git-and-tools/hub/default.nix
index 645b12220bdc..12b7b8965efa 100644
--- a/pkgs/applications/version-management/git-and-tools/hub/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/hub/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildGoPackage, fetchFromGitHub, go, ronn, ruby, groff, Security, utillinux }:
+{ stdenv, buildGoPackage, fetchFromGitHub, ronn, ruby, groff, Security, utillinux }:
 
 buildGoPackage rec {
   name = "hub-${version}";
diff --git a/pkgs/applications/version-management/git-and-tools/svn-all-fast-export/default.nix b/pkgs/applications/version-management/git-and-tools/svn-all-fast-export/default.nix
index e3ceccdcf3bd..17fb74945dc4 100644
--- a/pkgs/applications/version-management/git-and-tools/svn-all-fast-export/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/svn-all-fast-export/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, qmake, qtbase, qttools, subversion, apr }:
+{ stdenv, fetchFromGitHub, qmake, qtbase, qttools, subversion, apr }:
 
 let
   version = "1.0.12";
diff --git a/pkgs/applications/version-management/git-lfs/1.nix b/pkgs/applications/version-management/git-lfs/1.nix
index 24c22d423d5d..3cde046a2adf 100644
--- a/pkgs/applications/version-management/git-lfs/1.nix
+++ b/pkgs/applications/version-management/git-lfs/1.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "git-lfs-${version}";
diff --git a/pkgs/applications/version-management/git-review/default.nix b/pkgs/applications/version-management/git-review/default.nix
index 21ceccf9f351..7b81c28c3755 100644
--- a/pkgs/applications/version-management/git-review/default.nix
+++ b/pkgs/applications/version-management/git-review/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pythonPackages, python} :
+{ stdenv, fetchurl, pythonPackages} :
 
 pythonPackages.buildPythonApplication rec {
   name = "git-review-${version}";
diff --git a/pkgs/applications/version-management/git-sizer/default.nix b/pkgs/applications/version-management/git-sizer/default.nix
index a0d7382de341..9c5ab20d364f 100644
--- a/pkgs/applications/version-management/git-sizer/default.nix
+++ b/pkgs/applications/version-management/git-sizer/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "git-sizer";
diff --git a/pkgs/applications/version-management/gitea/default.nix b/pkgs/applications/version-management/gitea/default.nix
index 917deac6daa3..5f8619b4a7f8 100644
--- a/pkgs/applications/version-management/gitea/default.nix
+++ b/pkgs/applications/version-management/gitea/default.nix
@@ -1,5 +1,5 @@
 { stdenv, buildGoPackage, fetchFromGitHub, makeWrapper
-, git, coreutils, bash, gzip, openssh
+, git, bash, gzip, openssh
 , sqliteSupport ? true
 }:
 
diff --git a/pkgs/applications/version-management/gitkraken/default.nix b/pkgs/applications/version-management/gitkraken/default.nix
index db2fdf0199e3..3fb9b9492af2 100644
--- a/pkgs/applications/version-management/gitkraken/default.nix
+++ b/pkgs/applications/version-management/gitkraken/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, libXcomposite, libgnome-keyring, makeWrapper, udev, curl, alsaLib
+{ stdenv, libXcomposite, libgnome-keyring, makeWrapper, udev, curl, alsaLib
 , libXfixes, atk, gtk2, libXrender, pango, gnome2, cairo, freetype, fontconfig
 , libX11, libXi, libxcb, libXext, libXcursor, glib, libXScrnSaver, libxkbfile, libXtst
 , nss, nspr, cups, fetchurl, expat, gdk_pixbuf, libXdamage, libXrandr, dbus
diff --git a/pkgs/applications/version-management/gitlab/default.nix b/pkgs/applications/version-management/gitlab/default.nix
index 87e4aff28c37..71c62b758682 100644
--- a/pkgs/applications/version-management/gitlab/default.nix
+++ b/pkgs/applications/version-management/gitlab/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv, lib, bundler, fetchurl, fetchFromGitHub, bundlerEnv, libiconv
+{ stdenv, lib, fetchurl, fetchFromGitHub, bundlerEnv
 , ruby, tzdata, git, procps, nettools
 }:
 
diff --git a/pkgs/applications/version-management/gogs/default.nix b/pkgs/applications/version-management/gogs/default.nix
index 508c8b3fb6de..d3c248b44752 100644
--- a/pkgs/applications/version-management/gogs/default.nix
+++ b/pkgs/applications/version-management/gogs/default.nix
@@ -1,5 +1,5 @@
 { stdenv, buildGoPackage, fetchFromGitHub, makeWrapper
-, git, coreutils, bash, gzip, openssh
+, git, bash, gzip, openssh
 , sqliteSupport ? true
 }:
 
diff --git a/pkgs/applications/version-management/guitone/default.nix b/pkgs/applications/version-management/guitone/default.nix
index ded0d5e39863..88074a0862c1 100644
--- a/pkgs/applications/version-management/guitone/default.nix
+++ b/pkgs/applications/version-management/guitone/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchmtn, qt4, qmake4Hook, pkgconfig, graphviz }:
+{ stdenv, fetchmtn, qt4, qmake4Hook, pkgconfig, graphviz }:
 
 let version = "1.0-mtn-head"; in
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/version-management/mercurial/default.nix b/pkgs/applications/version-management/mercurial/default.nix
index a00393abf270..d786e9396752 100644
--- a/pkgs/applications/version-management/mercurial/default.nix
+++ b/pkgs/applications/version-management/mercurial/default.nix
@@ -1,6 +1,6 @@
-{ stdenv, fetchurl, python2Packages, makeWrapper, docutils, unzip
+{ stdenv, fetchurl, python2Packages, makeWrapper, unzip
 , guiSupport ? false, tk ? null
-, ApplicationServices, cf-private }:
+, ApplicationServices }:
 
 let
   # if you bump version, update pkgs.tortoisehg too or ping maintainer
diff --git a/pkgs/applications/version-management/rapidsvn/default.nix b/pkgs/applications/version-management/rapidsvn/default.nix
index 7b3c7aafa44e..e799d5fac43b 100644
--- a/pkgs/applications/version-management/rapidsvn/default.nix
+++ b/pkgs/applications/version-management/rapidsvn/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, wxGTK, subversion, apr, aprutil, python }:
+{ stdenv, fetchurl, wxGTK, subversion, apr, aprutil, python }:
 
 stdenv.mkDerivation rec {
   name = "rapidsvn-${version}";
diff --git a/pkgs/applications/version-management/redmine/default.nix b/pkgs/applications/version-management/redmine/default.nix
index 1535d88026a3..5a23c38a8863 100644
--- a/pkgs/applications/version-management/redmine/default.nix
+++ b/pkgs/applications/version-management/redmine/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, ruby, bundler, libiconv, libxslt, libxml2, pkgconfig, libffi, glibc, imagemagickBig, postgresql }:
+{ stdenv, fetchurl, ruby, bundler, libiconv, libxslt, libxml2, pkgconfig, libffi, imagemagickBig, postgresql }:
 
 let
   gemspec = map (gem: fetchurl { url=gem.url; sha256=gem.hash; }) (import ./Gemfile.nix);
diff --git a/pkgs/applications/version-management/reposurgeon/default.nix b/pkgs/applications/version-management/reposurgeon/default.nix
index 84b6633b8835..3fd665723159 100644
--- a/pkgs/applications/version-management/reposurgeon/default.nix
+++ b/pkgs/applications/version-management/reposurgeon/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchurl, makeWrapper, python27Packages, git
 , docbook_xml_dtd_412, docbook_xsl, asciidoc, xmlto
 , bazaar ? null, cvs ? null, darcs ? null, fossil ? null
-, mercurial ? null, monotone ? null, rcs ? null, src ? null
+, mercurial ? null, monotone ? null, rcs ? null
 , subversion ? null, cvs_fast_export ? null }:
 
 with stdenv; with lib;
diff --git a/pkgs/applications/version-management/smartgithg/default.nix b/pkgs/applications/version-management/smartgithg/default.nix
index a34afbab55e6..519f339a5083 100644
--- a/pkgs/applications/version-management/smartgithg/default.nix
+++ b/pkgs/applications/version-management/smartgithg/default.nix
@@ -2,7 +2,6 @@
 , jre
 , gtk2, glib
 , libXtst
-, git, mercurial, subversion
 , which
 }:
 
diff --git a/pkgs/applications/version-management/tailor/default.nix b/pkgs/applications/version-management/tailor/default.nix
index dc202e9e7b49..c68cc928848d 100644
--- a/pkgs/applications/version-management/tailor/default.nix
+++ b/pkgs/applications/version-management/tailor/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, python2Packages }:
+{ fetchurl, python2Packages }:
 
 python2Packages.buildPythonApplication rec {
   name = "tailor-${version}";
diff --git a/pkgs/applications/version-management/yadm/default.nix b/pkgs/applications/version-management/yadm/default.nix
index 8b2d6fcc8c38..0553b60fde71 100644
--- a/pkgs/applications/version-management/yadm/default.nix
+++ b/pkgs/applications/version-management/yadm/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub }:
+{ stdenv, fetchFromGitHub }:
 
 let version = "1.12.0"; in
 stdenv.mkDerivation {
diff --git a/pkgs/applications/video/avidemux/default.nix b/pkgs/applications/video/avidemux/default.nix
index b36147009a66..0637e813b48c 100644
--- a/pkgs/applications/video/avidemux/default.nix
+++ b/pkgs/applications/video/avidemux/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, cmake, pkgconfig, lndir
+{ stdenv, lib, fetchurl, cmake, pkgconfig
 , zlib, gettext, libvdpau, libva, libXv, sqlite
 , yasm, freetype, fontconfig, fribidi
 , makeWrapper, libXext, libGLU, qttools, qtbase
diff --git a/pkgs/applications/video/cinelerra/default.nix b/pkgs/applications/video/cinelerra/default.nix
index 4adbdbdadb2a..4235ebb802ed 100644
--- a/pkgs/applications/video/cinelerra/default.nix
+++ b/pkgs/applications/video/cinelerra/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchgit, sourceFromHead, autoconf, automake, libtool
+{ stdenv, fetchgit, autoconf, automake, libtool
 , pkgconfig, faad2, faac, a52dec, alsaLib, fftw, lame, libavc1394
 , libiec61883, libraw1394, libsndfile, libvorbis, libogg, libjpeg
 , libtiff, freetype, mjpegtools, x264, gettext, openexr
diff --git a/pkgs/applications/video/devede/default.nix b/pkgs/applications/video/devede/default.nix
index 157e4903e52e..48c5032f2da2 100644
--- a/pkgs/applications/video/devede/default.nix
+++ b/pkgs/applications/video/devede/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv, fetchFromGitHub, python3Packages, ffmpeg, mplayer, vcdimager, cdrkit, dvdauthor
+{ stdenv, fetchFromGitHub, python3Packages, ffmpeg, mplayer, vcdimager, cdrkit, dvdauthor
 , gtk3, gettext, wrapGAppsHook, gdk_pixbuf }:
 
 let
diff --git a/pkgs/applications/video/handbrake/default.nix b/pkgs/applications/video/handbrake/default.nix
index 0d0ac0a2e947..32dd3e6ff758 100644
--- a/pkgs/applications/video/handbrake/default.nix
+++ b/pkgs/applications/video/handbrake/default.nix
@@ -4,13 +4,13 @@
 #
 
 { stdenv, lib, fetchurl,
-  python2, pkgconfig, yasm, harfbuzz, zlib,
+  python2, pkgconfig, yasm, zlib,
   autoconf, automake, libtool, m4, jansson,
   libass, libiconv, libsamplerate, fribidi, libxml2, bzip2,
   libogg, libopus, libtheora, libvorbis, libdvdcss, a52dec,
   lame, libdvdread, libdvdnav, libbluray,
   mp4v2, mpeg2dec, x264, x265, libmkv,
-  fontconfig, freetype, hicolor-icon-theme,
+  fontconfig, freetype,
   glib, gtk3, intltool, libnotify,
   gst_all_1, dbus-glib, udev, libgudev, libvpx,
   useGtk ? true, wrapGAppsHook ? null, libappindicator-gtk3 ? null,
diff --git a/pkgs/applications/video/k9copy/default.nix b/pkgs/applications/video/k9copy/default.nix
index 48c7624cfa6a..1e8883eae7ff 100644
--- a/pkgs/applications/video/k9copy/default.nix
+++ b/pkgs/applications/video/k9copy/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl
-, cmake, automoc4
+, cmake
 , dvdauthor, xineLib, libmpeg2, libav, libdvdread, libdvdnav, dvdplusrwtools
 , phonon, qtx11extras
 , extra-cmake-modules, kio, kiconthemes, ki18n, kdesu, kdoctools, solid
diff --git a/pkgs/applications/video/kodi/commons.nix b/pkgs/applications/video/kodi/commons.nix
index 734229eac938..eff9b7871069 100644
--- a/pkgs/applications/video/kodi/commons.nix
+++ b/pkgs/applications/video/kodi/commons.nix
@@ -1,6 +1,5 @@
-{ stdenv, fetchurl, fetchFromGitHub, fetchpatch, lib
-, unzip, cmake, kodiPlain, steam, libcec_platform, tinyxml
-, libusb, pcre-cpp, jsoncpp, libhdhomerun }:
+{ stdenv, fetchFromGitHub
+, cmake, kodiPlain, libcec_platform, tinyxml }:
 
 rec {
 
diff --git a/pkgs/applications/video/kodi/default.nix b/pkgs/applications/video/kodi/default.nix
index 776d2732327f..5ca678a2e175 100644
--- a/pkgs/applications/video/kodi/default.nix
+++ b/pkgs/applications/video/kodi/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, fetchurl, autoconf, automake, libtool, makeWrapper
+{ stdenv, lib, fetchFromGitHub, autoconf, automake, libtool, makeWrapper
 , pkgconfig, cmake, gnumake, yasm, python2
 , libgcrypt, libgpgerror, libunistring
 , boost, avahi, lame, autoreconfHook
diff --git a/pkgs/applications/video/kodi/plugins.nix b/pkgs/applications/video/kodi/plugins.nix
index 4d6b18854549..5a0583202e6d 100644
--- a/pkgs/applications/video/kodi/plugins.nix
+++ b/pkgs/applications/video/kodi/plugins.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, callPackage, fetchurl, fetchFromGitHub, unzip
+{ stdenv, callPackage, fetchurl, fetchFromGitHub, unzip
 , steam, libusb, pcre-cpp, jsoncpp, libhdhomerun, zlib }:
 
 with (callPackage ./commons.nix {});
diff --git a/pkgs/applications/video/lightworks/default.nix b/pkgs/applications/video/lightworks/default.nix
index e3b94b69179c..64a967001b57 100644
--- a/pkgs/applications/video/lightworks/default.nix
+++ b/pkgs/applications/video/lightworks/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, fetchurl, dpkg, makeWrapper, patchelf, buildFHSUserEnv
-, gtk3, gnome3, gdk_pixbuf, cairo, libjpeg_original, glib, gnome2, libGLU
+{ stdenv, fetchurl, dpkg, makeWrapper, buildFHSUserEnv
+, gnome3, gdk_pixbuf, cairo, libjpeg_original, glib, gnome2, libGLU
 , nvidia_cg_toolkit, zlib, openssl, portaudio
 }:
 let
diff --git a/pkgs/applications/video/mapmap/default.nix b/pkgs/applications/video/mapmap/default.nix
index 6569caad6c52..c44bd25b91a7 100644
--- a/pkgs/applications/video/mapmap/default.nix
+++ b/pkgs/applications/video/mapmap/default.nix
@@ -1,7 +1,6 @@
 { stdenv 
 , fetchFromGitHub
 , qttools
-, qtbase
 , qtmultimedia
 , liblo
 , gst_all_1
diff --git a/pkgs/applications/video/mplayer/default.nix b/pkgs/applications/video/mplayer/default.nix
index f2d40c2ac808..02a0c2c0ec49 100644
--- a/pkgs/applications/video/mplayer/default.nix
+++ b/pkgs/applications/video/mplayer/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, pkgconfig, freetype, yasm, ffmpeg
+{ stdenv, fetchurl, pkgconfig, freetype, yasm, ffmpeg
 , aalibSupport ? true, aalib ? null
 , fontconfigSupport ? true, fontconfig ? null, freefont_ttf ? null
 , fribidiSupport ? true, fribidi ? null
diff --git a/pkgs/applications/video/mpv/default.nix b/pkgs/applications/video/mpv/default.nix
index cefd5b66aed1..e3954598cbe0 100644
--- a/pkgs/applications/video/mpv/default.nix
+++ b/pkgs/applications/video/mpv/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub, fetchpatch, makeWrapper
+{ stdenv, fetchurl, fetchFromGitHub, makeWrapper
 , docutils, perl, pkgconfig, python3, which, ffmpeg_4
 , freefont_ttf, freetype, libass, libpthreadstubs
 , lua, luasocket, libuchardet, libiconv ? null, darwin
diff --git a/pkgs/applications/video/natron/default.nix b/pkgs/applications/video/natron/default.nix
index 1eb725d10bbc..090b4ec9ffe2 100644
--- a/pkgs/applications/video/natron/default.nix
+++ b/pkgs/applications/video/natron/default.nix
@@ -1,6 +1,6 @@
 { lib, stdenv, fetchurl, qt4, pkgconfig, boost, expat, cairo, python2Packages,
   cmake, flex, bison, pango, librsvg, librevenge, libxml2, libcdr, libzip,
-  poppler, imagemagick, glew, openexr, ffmpeg, opencolorio, openimageio,
+  poppler, imagemagick, openexr, ffmpeg, opencolorio, openimageio,
   qmake4Hook, libpng, libGL, lndir }:
 
 let
diff --git a/pkgs/applications/video/openshot-qt/libopenshot.nix b/pkgs/applications/video/openshot-qt/libopenshot.nix
index 9e5e278ba894..422b50a85854 100644
--- a/pkgs/applications/video/openshot-qt/libopenshot.nix
+++ b/pkgs/applications/video/openshot-qt/libopenshot.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch
+{ stdenv, fetchFromGitHub
 , pkgconfig, cmake, doxygen
 , libopenshot-audio, imagemagick, ffmpeg
 , swig, python3
diff --git a/pkgs/applications/video/pitivi/default.nix b/pkgs/applications/video/pitivi/default.nix
index 6c92b9aeed6b..cea85f553b5f 100644
--- a/pkgs/applications/video/pitivi/default.nix
+++ b/pkgs/applications/video/pitivi/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, pkgconfig, intltool, itstool, wrapGAppsHook
-, python3Packages, gst, gtk3, hicolor-icon-theme
+, python3Packages, gst, gtk3
 , gobjectIntrospection, librsvg, gnome3, libnotify
 , meson, ninja
 }:
diff --git a/pkgs/applications/video/qstopmotion/default.nix b/pkgs/applications/video/qstopmotion/default.nix
index a689697e0a0f..1fce30edbdf4 100644
--- a/pkgs/applications/video/qstopmotion/default.nix
+++ b/pkgs/applications/video/qstopmotion/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, qt5, ffmpeg, guvcview, automoc4
+{ stdenv, fetchurl, qt5, ffmpeg, guvcview
 , cmake, ninja, libxml2, gettext, pkgconfig, libgphoto2, gphoto2, v4l_utils
 , libv4l, pcre }:
 
diff --git a/pkgs/applications/video/recordmydesktop/gtk.nix b/pkgs/applications/video/recordmydesktop/gtk.nix
index 2beb3ca94f24..984b623cee7e 100644
--- a/pkgs/applications/video/recordmydesktop/gtk.nix
+++ b/pkgs/applications/video/recordmydesktop/gtk.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchsvn, recordmydesktop, autoreconfHook, pkgconfig, glib
+{ stdenv, lib, fetchsvn, recordmydesktop, autoreconfHook, pkgconfig
 , pythonPackages, jack2, xwininfo }:
 
 let
diff --git a/pkgs/applications/video/zdfmediathk/default.nix b/pkgs/applications/video/zdfmediathk/default.nix
index d85e4df7434d..a875daf065e9 100644
--- a/pkgs/applications/video/zdfmediathk/default.nix
+++ b/pkgs/applications/video/zdfmediathk/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, unzip, jre }:
+{ stdenv, fetchurl, jre }:
 
 with stdenv;
 
diff --git a/pkgs/applications/virtualization/containerd/default.nix b/pkgs/applications/virtualization/containerd/default.nix
index 46d03ad3d622..6c739b32c5fb 100644
--- a/pkgs/applications/virtualization/containerd/default.nix
+++ b/pkgs/applications/virtualization/containerd/default.nix
@@ -1,5 +1,5 @@
 { stdenv, lib, fetchFromGitHub, removeReferencesTo
-, go, libapparmor, apparmor-parser, libseccomp, btrfs-progs }:
+, go, btrfs-progs }:
 
 with lib;
 
diff --git a/pkgs/applications/virtualization/docker/default.nix b/pkgs/applications/virtualization/docker/default.nix
index 6e40f9ba0762..d52b5365b5ef 100644
--- a/pkgs/applications/virtualization/docker/default.nix
+++ b/pkgs/applications/virtualization/docker/default.nix
@@ -1,6 +1,6 @@
 { stdenv, lib, fetchFromGitHub, makeWrapper, removeReferencesTo, pkgconfig
 , go-md2man, go, containerd, runc, docker-proxy, tini, libtool
-, sqlite, iproute, bridge-utils, lvm2, systemd
+, sqlite, iproute, lvm2, systemd
 , btrfs-progs, iptables, e2fsprogs, xz, utillinux, xfsprogs
 , procps, libseccomp
 }:
diff --git a/pkgs/applications/virtualization/runc/default.nix b/pkgs/applications/virtualization/runc/default.nix
index b0fd42f4efb1..7172b172ef2f 100644
--- a/pkgs/applications/virtualization/runc/default.nix
+++ b/pkgs/applications/virtualization/runc/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, fetchpatch, removeReferencesTo, go-md2man
+{ stdenv, lib, fetchFromGitHub, removeReferencesTo, go-md2man
 , go, pkgconfig, libapparmor, apparmor-parser, libseccomp }:
 
 with lib;
diff --git a/pkgs/applications/virtualization/virtinst/default.nix b/pkgs/applications/virtualization/virtinst/default.nix
index f0ee4b5b26ed..8222fb50a8f9 100644
--- a/pkgs/applications/virtualization/virtinst/default.nix
+++ b/pkgs/applications/virtualization/virtinst/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, python2Packages, intltool, libxml2Python, curl }:
+{ stdenv, fetchurl, python2Packages, intltool, libxml2Python }:
 
 with stdenv.lib;
 
diff --git a/pkgs/applications/virtualization/virtualbox/default.nix b/pkgs/applications/virtualization/virtualbox/default.nix
index e7ab3aa251cf..f9770435aaf0 100644
--- a/pkgs/applications/virtualization/virtualbox/default.nix
+++ b/pkgs/applications/virtualization/virtualbox/default.nix
@@ -1,12 +1,12 @@
 { stdenv, fetchurl, lib, fetchpatch, iasl, dev86, pam, libxslt, libxml2
 , libX11, xproto, libXext, libXcursor, libXmu, qt5, libIDL, SDL, libcap
-, zlib, libpng, glib, lvm2, libXrandr, libXinerama
+, libpng, glib, lvm2, libXrandr, libXinerama
 , pkgconfig, which, docbook_xsl, docbook_xml_dtd_43
-, alsaLib, curl, libvpx, gawk, nettools, dbus
+, alsaLib, curl, libvpx, nettools, dbus
 , xorriso, makeself, perl
 , javaBindings ? false, jdk ? null
 , pythonBindings ? false, python2 ? null
-, enableExtensionPack ? false, requireFile ? null, patchelf ? null, fakeroot ? null
+, enableExtensionPack ? false, requireFile ? null, fakeroot ? null
 , pulseSupport ? false, libpulseaudio ? null
 , enableHardening ? false
 , headless ? false
diff --git a/pkgs/applications/virtualization/vpcs/default.nix b/pkgs/applications/virtualization/vpcs/default.nix
index af344eb82cf5..65435e19366b 100644
--- a/pkgs/applications/virtualization/vpcs/default.nix
+++ b/pkgs/applications/virtualization/vpcs/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, cmake, glibc, buildPlatform }:
+{ stdenv, fetchurl, glibc, buildPlatform }:
 
 stdenv.mkDerivation rec {
   name = "${pname}-${version}";
diff --git a/pkgs/applications/window-managers/bspwm/default.nix b/pkgs/applications/window-managers/bspwm/default.nix
index 0538228d4b4e..dc57ad13d414 100644
--- a/pkgs/applications/window-managers/bspwm/default.nix
+++ b/pkgs/applications/window-managers/bspwm/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, libxcb, libXinerama
-, sxhkd, xcbutil, xcbutilkeysyms, xcbutilwm
+, xcbutil, xcbutilkeysyms, xcbutilwm
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/window-managers/bspwm/unstable.nix b/pkgs/applications/window-managers/bspwm/unstable.nix
index 7b31c63128a7..09c7c8e0e088 100644
--- a/pkgs/applications/window-managers/bspwm/unstable.nix
+++ b/pkgs/applications/window-managers/bspwm/unstable.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, libxcb, libXinerama, sxhkd, xcbutil, xcbutilkeysyms, xcbutilwm }:
+{ stdenv, fetchFromGitHub, libxcb, libXinerama, xcbutil, xcbutilkeysyms, xcbutilwm }:
 
 stdenv.mkDerivation rec {
   name = "bspwm-unstable-2016-09-30";
diff --git a/pkgs/applications/window-managers/clfswm/default.nix b/pkgs/applications/window-managers/clfswm/default.nix
index 97e399a133ef..cc00f1e4b6e9 100644
--- a/pkgs/applications/window-managers/clfswm/default.nix
+++ b/pkgs/applications/window-managers/clfswm/default.nix
@@ -1,6 +1,5 @@
-{ stdenv, pkgs, fetchgit, autoconf, sbcl, lispPackages, xdpyinfo, texinfo4
-, makeWrapper , rlwrap, gnused, gnugrep, coreutils, xprop
-, extraModulePaths ? [] }:
+{ stdenv, fetchgit, autoconf, sbcl, lispPackages, xdpyinfo, texinfo4
+, makeWrapper }:
 
 stdenv.mkDerivation rec {
   name = "clfswm";
diff --git a/pkgs/applications/window-managers/i3/default.nix b/pkgs/applications/window-managers/i3/default.nix
index 986639c947b0..74c3c71dbf7c 100644
--- a/pkgs/applications/window-managers/i3/default.nix
+++ b/pkgs/applications/window-managers/i3/default.nix
@@ -1,6 +1,6 @@
 { fetchurl, stdenv, which, pkgconfig, makeWrapper, libxcb, xcbutilkeysyms
 , xcbutil, xcbutilwm, xcbutilxrm, libstartup_notification, libX11, pcre, libev
-, yajl, xcb-util-cursor, coreutils, perl, pango, perlPackages, libxkbcommon
+, yajl, xcb-util-cursor, perl, pango, perlPackages, libxkbcommon
 , xorgserver, xvfb_run }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/window-managers/notion/default.nix b/pkgs/applications/window-managers/notion/default.nix
index ebe58e921ddd..eaeb9979c10c 100644
--- a/pkgs/applications/window-managers/notion/default.nix
+++ b/pkgs/applications/window-managers/notion/default.nix
@@ -1,6 +1,6 @@
 {
   enableXft ? true, libXft ? null, patches ? [], stdenv, lua, gettext, pkgconfig, xlibsWrapper, libXinerama, libXrandr, libX11,
-  xterm, xmessage, makeWrapper, lib, fetchFromGitHub, mandoc, which
+  xterm, xmessage, makeWrapper, fetchFromGitHub, mandoc, which
 }:
 
 assert enableXft -> libXft != null;
diff --git a/pkgs/applications/window-managers/spectrwm/default.nix b/pkgs/applications/window-managers/spectrwm/default.nix
index 1a3c976f77de..81901be0e60b 100644
--- a/pkgs/applications/window-managers/spectrwm/default.nix
+++ b/pkgs/applications/window-managers/spectrwm/default.nix
@@ -1,5 +1,4 @@
 { fetchurl
-, coreutils
 , libX11
 , libXrandr
 , libXcursor
diff --git a/pkgs/applications/window-managers/stumpwm/default.nix b/pkgs/applications/window-managers/stumpwm/default.nix
index 117d4fe1d6a8..3ed7f4325f24 100644
--- a/pkgs/applications/window-managers/stumpwm/default.nix
+++ b/pkgs/applications/window-managers/stumpwm/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, pkgs, fetchgit, autoconf, sbcl, lispPackages, xdpyinfo, texinfo4
+{ stdenv, fetchgit, autoconf, sbcl, lispPackages, xdpyinfo, texinfo4
 , makeWrapper , rlwrap, gnused, gnugrep, coreutils, xprop
 , extraModulePaths ? []
 , version }:
diff --git a/pkgs/applications/window-managers/taffybar/default.nix b/pkgs/applications/window-managers/taffybar/default.nix
index b1e0628ba921..dfb2eec5dc55 100644
--- a/pkgs/applications/window-managers/taffybar/default.nix
+++ b/pkgs/applications/window-managers/taffybar/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, ghcWithPackages, xmessage, makeWrapper, packages ? (x: []) }:
+{ stdenv, ghcWithPackages, makeWrapper, packages ? (x: []) }:
 
 let
 taffybarEnv = ghcWithPackages (self: [ self.taffybar ] ++ packages self);
diff --git a/pkgs/applications/window-managers/wtftw/default.nix b/pkgs/applications/window-managers/wtftw/default.nix
index c68562d82b39..8a680e1f7633 100644
--- a/pkgs/applications/window-managers/wtftw/default.nix
+++ b/pkgs/applications/window-managers/wtftw/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, rustPlatform, cargo, libXinerama, libX11, pkgconfig }:
+{ stdenv, fetchFromGitHub, rustPlatform, libXinerama, libX11, pkgconfig }:
 
 rustPlatform.buildRustPackage rec {
   name = "wtftw-0.0pre20170921";
diff --git a/pkgs/build-support/build-fhs-userenv/default.nix b/pkgs/build-support/build-fhs-userenv/default.nix
index 219530a67bd8..c733556de45c 100644
--- a/pkgs/build-support/build-fhs-userenv/default.nix
+++ b/pkgs/build-support/build-fhs-userenv/default.nix
@@ -1,4 +1,4 @@
-{ callPackage, runCommand, lib, writeScript, stdenv, coreutils }:
+{ callPackage, runCommand, writeScript, stdenv, coreutils }:
 
 let buildFHSEnv = callPackage ./env.nix { }; in
 
diff --git a/pkgs/build-support/docker/default.nix b/pkgs/build-support/docker/default.nix
index ff45cf81d7e5..950c0c86a6e4 100644
--- a/pkgs/build-support/docker/default.nix
+++ b/pkgs/build-support/docker/default.nix
@@ -1,5 +1,4 @@
 {
-  callPackage,
   coreutils,
   docker,
   e2fsprogs,
diff --git a/pkgs/build-support/emacs/elpa.nix b/pkgs/build-support/emacs/elpa.nix
index 79a26abcb831..e6f6c23e449f 100644
--- a/pkgs/build-support/emacs/elpa.nix
+++ b/pkgs/build-support/emacs/elpa.nix
@@ -1,6 +1,6 @@
 # builder for Emacs packages built for packages.el
 
-{ lib, stdenv, fetchurl, emacs, texinfo }:
+{ lib, stdenv, emacs, texinfo }:
 
 with lib;
 
diff --git a/pkgs/build-support/emacs/melpa.nix b/pkgs/build-support/emacs/melpa.nix
index f55c91f82c7d..5fa45b154a37 100644
--- a/pkgs/build-support/emacs/melpa.nix
+++ b/pkgs/build-support/emacs/melpa.nix
@@ -1,7 +1,7 @@
 # builder for Emacs packages built for packages.el
 # using MELPA package-build.el
 
-{ lib, stdenv, fetchurl, fetchFromGitHub, emacs, texinfo }:
+{ lib, stdenv, fetchFromGitHub, emacs, texinfo }:
 
 with lib;
 
diff --git a/pkgs/build-support/fetchdarcs/default.nix b/pkgs/build-support/fetchdarcs/default.nix
index 3b965b06662c..02777c9900dc 100644
--- a/pkgs/build-support/fetchdarcs/default.nix
+++ b/pkgs/build-support/fetchdarcs/default.nix
@@ -1,4 +1,4 @@
-{stdenvNoCC, darcs, nix, cacert}:
+{stdenvNoCC, darcs, cacert}:
 
 {url, rev ? null, context ? null, md5 ? "", sha256 ? ""}:
 
diff --git a/pkgs/build-support/fetchdocker/credentials.nix b/pkgs/build-support/fetchdocker/credentials.nix
index c01288dbf53a..001693501ccb 100644
--- a/pkgs/build-support/fetchdocker/credentials.nix
+++ b/pkgs/build-support/fetchdocker/credentials.nix
@@ -32,7 +32,7 @@
 let
   pathParts =
    (builtins.filter
-    ({path, prefix}: "DOCKER_CREDENTIALS" == prefix)
+    ({prefix}: "DOCKER_CREDENTIALS" == prefix)
     builtins.nixPath);
 in
   if (pathParts != []) then (builtins.head pathParts).path else ""
diff --git a/pkgs/build-support/fetchdocker/default.nix b/pkgs/build-support/fetchdocker/default.nix
index ae3ae4185e05..3556df32d926 100644
--- a/pkgs/build-support/fetchdocker/default.nix
+++ b/pkgs/build-support/fetchdocker/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, coreutils, bash, gnutar, jq, writeText }:
+{ stdenv, lib, coreutils, bash, gnutar, writeText }:
 let
   stripScheme =
     builtins.replaceStrings [ "https://" "http://" ] [ "" "" ];
diff --git a/pkgs/build-support/fetchgit/private.nix b/pkgs/build-support/fetchgit/private.nix
index 4dcf6d06718a..59376f3b0424 100644
--- a/pkgs/build-support/fetchgit/private.nix
+++ b/pkgs/build-support/fetchgit/private.nix
@@ -1,4 +1,4 @@
-{ fetchgit, runCommand, makeWrapper, openssh, stdenv }: args: derivation ((fetchgit args).drvAttrs // {
+{ fetchgit, runCommand, makeWrapper, openssh }: args: derivation ((fetchgit args).drvAttrs // {
   SSH_AUTH_SOCK = if (builtins.tryEval <ssh-auth-sock>).success
     then builtins.toString <ssh-auth-sock>
     else null;
diff --git a/pkgs/build-support/fetchgitlocal/default.nix b/pkgs/build-support/fetchgitlocal/default.nix
index 7a25966e9fb5..fa1945775537 100644
--- a/pkgs/build-support/fetchgitlocal/default.nix
+++ b/pkgs/build-support/fetchgitlocal/default.nix
@@ -1,4 +1,4 @@
-{ runCommand, git, nix }: src:
+{ runCommand, git }: src:
 
 let
   srcStr = toString src;
diff --git a/pkgs/build-support/fetchhg/default.nix b/pkgs/build-support/fetchhg/default.nix
index 36a48ce9f170..40ead021cdbf 100644
--- a/pkgs/build-support/fetchhg/default.nix
+++ b/pkgs/build-support/fetchhg/default.nix
@@ -1,4 +1,4 @@
-{stdenvNoCC, mercurial, nix}: {name ? null, url, rev ? null, md5 ? null, sha256 ? null, fetchSubrepos ? false}:
+{stdenvNoCC, mercurial}: {name ? null, url, rev ? null, md5 ? null, sha256 ? null, fetchSubrepos ? false}:
 
 if md5 != null then
   throw "fetchhg does not support md5 anymore, please use sha256"
diff --git a/pkgs/build-support/fetchnuget/default.nix b/pkgs/build-support/fetchnuget/default.nix
index 40ba79ec4353..960bc3c1ffb2 100644
--- a/pkgs/build-support/fetchnuget/default.nix
+++ b/pkgs/build-support/fetchnuget/default.nix
@@ -1,4 +1,4 @@
-{ stdenvNoCC, fetchurl, buildDotnetPackage, unzip }:
+{ fetchurl, buildDotnetPackage, unzip }:
 
 attrs @
 { baseName
diff --git a/pkgs/build-support/fetchs3/default.nix b/pkgs/build-support/fetchs3/default.nix
index 14dac9997d94..3dbde203374d 100644
--- a/pkgs/build-support/fetchs3/default.nix
+++ b/pkgs/build-support/fetchs3/default.nix
@@ -5,7 +5,6 @@
 , sha256
 , region ? "us-east-1"
 , credentials ? null # Default to looking at local EC2 metadata service
-, executable ? false
 , recursiveHash ? false
 , postFetch ? null
 }:
diff --git a/pkgs/build-support/rust/build-rust-crate.nix b/pkgs/build-support/rust/build-rust-crate.nix
index 7f21b66ce129..6c7dd67c4002 100644
--- a/pkgs/build-support/rust/build-rust-crate.nix
+++ b/pkgs/build-support/rust/build-rust-crate.nix
@@ -53,7 +53,7 @@ let makeDeps = dependencies:
     '';
 
     configureCrate =
-      { crateName, crateVersion, crateAuthors, build, libName, crateFeatures, colors, libPath, release, buildDependencies, completeDeps, completeBuildDeps, verbose, dependencies, workspace_member, extraLinkFlags }:
+      { crateName, crateVersion, crateAuthors, build, libName, crateFeatures, colors, libPath, release, buildDependencies, completeDeps, completeBuildDeps, verbose, workspace_member, extraLinkFlags }:
       let version_ = lib.splitString "-" crateVersion;
           versionPre = if lib.tail version_ == [] then "" else builtins.elemAt version_ 1;
           version = lib.splitString "." (lib.head version_);
@@ -181,9 +181,9 @@ let makeDeps = dependencies:
       runHook postConfigure
     '';
 
-    buildCrate = { crateName, crateVersion, crateAuthors,
-                   dependencies, completeDeps, completeBuildDeps,
-                   crateFeatures, libName, build, release, libPath,
+    buildCrate = { crateName,
+                   dependencies,
+                   crateFeatures, libName, release, libPath,
                    crateType, metadata, crateBin, finalBins,
                    extraRustcOpts, verbose, colors }:
 
@@ -422,16 +422,16 @@ stdenv.mkDerivation (rec {
     colors = lib.attrByPath [ "colors" ] "always" crate;
     extraLinkFlags = builtins.concatStringsSep " " (crate.extraLinkFlags or []);
     configurePhase = configureCrate {
-      inherit crateName dependencies buildDependencies completeDeps completeBuildDeps
+      inherit crateName buildDependencies completeDeps completeBuildDeps
               crateFeatures libName build workspace_member release libPath crateVersion
               extraLinkFlags
               crateAuthors verbose colors;
     };
     extraRustcOpts = if crate ? extraRustcOpts then crate.extraRustcOpts else [];
     buildPhase = buildCrate {
-      inherit crateName dependencies completeDeps completeBuildDeps
-              crateFeatures libName build release libPath crateType
-              crateVersion crateAuthors metadata crateBin finalBins verbose colors
+      inherit crateName dependencies
+              crateFeatures libName release libPath crateType
+              metadata crateBin finalBins verbose colors
               extraRustcOpts;
     };
     installPhase = installCrate crateName metadata;
diff --git a/pkgs/build-support/rust/cargo-vendor/cargo-vendor.nix b/pkgs/build-support/rust/cargo-vendor/cargo-vendor.nix
index ac6bb6ab1bd4..486f365f78ac 100644
--- a/pkgs/build-support/rust/cargo-vendor/cargo-vendor.nix
+++ b/pkgs/build-support/rust/cargo-vendor/cargo-vendor.nix
@@ -1,5 +1,5 @@
 # Generated by carnix 0.5.2: carnix Cargo.lock -o cargo-vendor.nix
-{ lib, buildPlatform, buildRustCrate, fetchgit }:
+{ lib, buildPlatform, buildRustCrate }:
 let kernel = buildPlatform.parsed.kernel.name;
     abi = buildPlatform.parsed.abi.name;
     hasFeature = feature:
diff --git a/pkgs/build-support/rust/default.nix b/pkgs/build-support/rust/default.nix
index 59e8c3e7f7ed..fb1d6e390ae1 100644
--- a/pkgs/build-support/rust/default.nix
+++ b/pkgs/build-support/rust/default.nix
@@ -1,4 +1,4 @@
-{ callPackage, fetchurl, stdenv, path, cacert, git, rust, cargo-vendor }:
+{ stdenv, cacert, git, rust, cargo-vendor }:
 let
   fetchcargo = import ./fetchcargo.nix {
     inherit stdenv cacert git rust cargo-vendor;
diff --git a/pkgs/build-support/singularity-tools/default.nix b/pkgs/build-support/singularity-tools/default.nix
index db2bef367e9e..5179f47eaa5e 100644
--- a/pkgs/build-support/singularity-tools/default.nix
+++ b/pkgs/build-support/singularity-tools/default.nix
@@ -8,8 +8,7 @@
 , vmTools
 , gawk
 , utillinux
-, e2fsprogs
-, squashfsTools }:
+, e2fsprogs }:
 
 rec {
   shellScript = name: text:
diff --git a/pkgs/data/fonts/arkpandora/default.nix b/pkgs/data/fonts/arkpandora/default.nix
index c2e64cb63dd1..909985d945bc 100644
--- a/pkgs/data/fonts/arkpandora/default.nix
+++ b/pkgs/data/fonts/arkpandora/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, unzip }:
+{ stdenv, fetchurl }:
 
 let
   version = "2.04";
diff --git a/pkgs/data/fonts/iosevka/default.nix b/pkgs/data/fonts/iosevka/default.nix
index 4fc47793661b..f7fce315e8c1 100644
--- a/pkgs/data/fonts/iosevka/default.nix
+++ b/pkgs/data/fonts/iosevka/default.nix
@@ -1,7 +1,6 @@
 {
   stdenv, lib,
   fetchFromGitHub, fetchurl,
-  runCommand, writeText,
   nodejs, ttfautohint-nox, otfcc,
 
   # Custom font set options.
diff --git a/pkgs/data/fonts/noto-fonts/default.nix b/pkgs/data/fonts/noto-fonts/default.nix
index 33435c98267a..0a086453244a 100644
--- a/pkgs/data/fonts/noto-fonts/default.nix
+++ b/pkgs/data/fonts/noto-fonts/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchzip, fetchFromGitHub, optipng, cairo, unzip, pythonPackages, pkgconfig, pngquant, which, imagemagick }:
+{ stdenv, fetchzip, fetchFromGitHub, optipng, cairo, pythonPackages, pkgconfig, pngquant, which, imagemagick }:
 
 let
   mkNoto = { name, weights, sha256, }:
diff --git a/pkgs/data/fonts/tex-gyre/default.nix b/pkgs/data/fonts/tex-gyre/default.nix
index 1cbf7168ea96..a801886350df 100644
--- a/pkgs/data/fonts/tex-gyre/default.nix
+++ b/pkgs/data/fonts/tex-gyre/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchzip }:
 
 let
-  mkVariant = variant: { displayName, version, abbreviation, sha256, outputHash }: stdenv.mkDerivation {
+  mkVariant = variant: { version, abbreviation, sha256, outputHash }: stdenv.mkDerivation {
     name = "tex-gyre-${variant}-${version}";
     inherit version;
 
diff --git a/pkgs/data/misc/cacert/default.nix b/pkgs/data/misc/cacert/default.nix
index e867d0fbb4be..aa6a42badb7c 100644
--- a/pkgs/data/misc/cacert/default.nix
+++ b/pkgs/data/misc/cacert/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, writeText, nss, python
+{ stdenv, fetchurl, nss, python
 , blacklist ? []
 , includeEmail ? false
 }:
diff --git a/pkgs/data/sgml+xml/schemas/xml-dtd/docbook-ebnf/default.nix b/pkgs/data/sgml+xml/schemas/xml-dtd/docbook-ebnf/default.nix
index bc51ceeca431..3d8e16443dbf 100644
--- a/pkgs/data/sgml+xml/schemas/xml-dtd/docbook-ebnf/default.nix
+++ b/pkgs/data/sgml+xml/schemas/xml-dtd/docbook-ebnf/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, unzip}:
+{stdenv, fetchurl}:
 
 stdenv.mkDerivation {
   name = "docbook-xml-ebnf-1.2b1";
diff --git a/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/4.1.2.nix b/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/4.1.2.nix
index d4cb7bc889d3..35e69641f116 100644
--- a/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/4.1.2.nix
+++ b/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/4.1.2.nix
@@ -12,7 +12,7 @@ let
 in
 
 import ./generic.nix {
-  inherit stdenv fetchurl unzip findXMLCatalogs;
+  inherit stdenv unzip findXMLCatalogs;
   name = "docbook-xml-4.1.2";
   src = fetchurl {
     url = http://www.docbook.org/xml/4.1.2/docbkx412.zip;
diff --git a/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/4.2.nix b/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/4.2.nix
index d2cc69559b86..f8c827e826d0 100644
--- a/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/4.2.nix
+++ b/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/4.2.nix
@@ -1,7 +1,7 @@
 {stdenv, fetchurl, unzip, findXMLCatalogs}:
 
 import ./generic.nix {
-  inherit stdenv fetchurl unzip findXMLCatalogs;
+  inherit stdenv unzip findXMLCatalogs;
   name = "docbook-xml-4.2";
   src = fetchurl {
     url = http://www.docbook.org/xml/4.2/docbook-xml-4.2.zip;
diff --git a/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/4.3.nix b/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/4.3.nix
index e1f9337df941..2c253a1029d6 100644
--- a/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/4.3.nix
+++ b/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/4.3.nix
@@ -1,7 +1,7 @@
 {stdenv, fetchurl, unzip, findXMLCatalogs}:
 
 import ./generic.nix {
-  inherit stdenv fetchurl unzip findXMLCatalogs;
+  inherit stdenv unzip findXMLCatalogs;
   name = "docbook-xml-4.3";
   src = fetchurl {
     url = http://www.docbook.org/xml/4.3/docbook-xml-4.3.zip;
diff --git a/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/4.4.nix b/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/4.4.nix
index 1a9d622affc6..d051d205808b 100644
--- a/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/4.4.nix
+++ b/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/4.4.nix
@@ -1,7 +1,7 @@
 {stdenv, fetchurl, unzip, findXMLCatalogs}:
 
 import ./generic.nix {
-  inherit stdenv fetchurl unzip findXMLCatalogs;
+  inherit stdenv unzip findXMLCatalogs;
   name = "docbook-xml-4.4";
   src = fetchurl {
     url = http://www.docbook.org/xml/4.4/docbook-xml-4.4.zip;
diff --git a/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/4.5.nix b/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/4.5.nix
index 301b400ac7e1..156ee653bbe3 100644
--- a/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/4.5.nix
+++ b/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/4.5.nix
@@ -1,7 +1,7 @@
 {stdenv, fetchurl, unzip, findXMLCatalogs}:
 
 import ./generic.nix {
-  inherit stdenv fetchurl unzip findXMLCatalogs;
+  inherit stdenv unzip findXMLCatalogs;
   name = "docbook-xml-4.5";
   src = fetchurl {
     url = http://www.docbook.org/xml/4.5/docbook-xml-4.5.zip;
diff --git a/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/generic.nix b/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/generic.nix
index 10b76f7b2b55..41c4b73d3f62 100644
--- a/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/generic.nix
+++ b/pkgs/data/sgml+xml/schemas/xml-dtd/docbook/generic.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, unzip, src, name, postInstall ? "true", meta ? {}, findXMLCatalogs }:
+{ stdenv, unzip, src, name, postInstall ? "true", meta ? {}, findXMLCatalogs }:
 
 stdenv.mkDerivation {
   inherit src name postInstall;
diff --git a/pkgs/desktops/enlightenment/enlightenment.nix b/pkgs/desktops/enlightenment/enlightenment.nix
index dc538625bf09..9119d5e93d81 100644
--- a/pkgs/desktops/enlightenment/enlightenment.nix
+++ b/pkgs/desktops/enlightenment/enlightenment.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, meson, ninja, pkgconfig, gettext, efl,
   xcbutilkeysyms, libXrandr, libXdmcp, libxcb, libffi, pam, alsaLib,
-  luajit, bzip2, libpthreadstubs, gdbm, libcap, libGLU, mesa_noglu,
+  luajit, bzip2, libpthreadstubs, gdbm, libcap, mesa_noglu,
   xkeyboard_config, pcre
 }:
 
diff --git a/pkgs/desktops/gnome-2/desktop/gnome-control-center/default.nix b/pkgs/desktops/gnome-2/desktop/gnome-control-center/default.nix
index 276bc7e79c1a..c4f6ad8207c2 100644
--- a/pkgs/desktops/gnome-2/desktop/gnome-control-center/default.nix
+++ b/pkgs/desktops/gnome-2/desktop/gnome-control-center/default.nix
@@ -1,8 +1,7 @@
-{ stdenv, fetchurl, pkgconfig, dbus-glib, libxml2Python, libxslt, libxklavier, cairo, popt, which, python
+{ stdenv, fetchurl, pkgconfig, dbus-glib, libxml2Python, libxslt, libxklavier, popt, which, python
 , shared-mime-info, desktop-file-utils, libunique, libtool, bzip2
-, glib, gtk, pango, atk, gnome-doc-utils, intltool, GConf, libglade, libgnome, libgnomeui, libgnomekbd
+, gtk, gnome-doc-utils, intltool, GConf, libglade, libgnomeui, libgnomekbd
 , librsvg, gnome_menus, gnome-desktop, gnome_panel, metacity, gnome-settings-daemon
-, libbonobo, libbonoboui, libgnomecanvas, libart_lgpl, gnome_vfs, ORBit2
 , libSM, docbook_xml_dtd_412 }:
 
 stdenv.mkDerivation {
diff --git a/pkgs/desktops/gnome-2/desktop/gnome-panel/default.nix b/pkgs/desktops/gnome-2/desktop/gnome-panel/default.nix
index d85b5494da47..3bef218740cb 100644
--- a/pkgs/desktops/gnome-2/desktop/gnome-panel/default.nix
+++ b/pkgs/desktops/gnome-2/desktop/gnome-panel/default.nix
@@ -1,7 +1,7 @@
-{ stdenv, fetchurl, pkgconfig, dbus-glib, dbus, cairo, popt, which, libxml2Python, libxslt, bzip2, python
-, glib, gtk, pango, atk, libXau, libcanberra-gtk2
+{ stdenv, fetchurl, pkgconfig, dbus-glib, popt, which, libxml2Python, libxslt, bzip2, python
+, gtk, libXau, libcanberra-gtk2
 , intltool, ORBit2, libglade, libgnome, libgnomeui, libbonobo, libbonoboui, GConf, gnome_menus, gnome-desktop
-, libwnck, librsvg, libgweather, gnome-doc-utils, libgnomecanvas, libart_lgpl, libtasn1, libtool, xorg }:
+, libwnck, librsvg, libgweather, gnome-doc-utils, libtasn1, libtool, xorg }:
 
 stdenv.mkDerivation {
   name = "gnome-panel-2.32.1";
diff --git a/pkgs/desktops/gnome-2/desktop/mail-notification/default.nix b/pkgs/desktops/gnome-2/desktop/mail-notification/default.nix
index d4935c498f13..c14ee25981c7 100644
--- a/pkgs/desktops/gnome-2/desktop/mail-notification/default.nix
+++ b/pkgs/desktops/gnome-2/desktop/mail-notification/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub, pkgconfig, glib, gnome2, dbus-glib, gmime, libnotify, libgnome-keyring, openssl, cyrus_sasl, gnonlin, sylpheed, gob2, gettext, intltool, libxml2, hicolor-icon-theme, tango-icon-theme }:
+{ stdenv, fetchFromGitHub, pkgconfig, glib, gnome2, dbus-glib, gmime, libnotify, libgnome-keyring, openssl, cyrus_sasl, gnonlin, sylpheed, gob2, gettext, intltool, libxml2, hicolor-icon-theme, tango-icon-theme }:
 
 stdenv.mkDerivation rec {
   rev = "9ae8768";
diff --git a/pkgs/desktops/gnome-2/desktop/zenity/default.nix b/pkgs/desktops/gnome-2/desktop/zenity/default.nix
index a9b692aadf51..0233f6340f55 100644
--- a/pkgs/desktops/gnome-2/desktop/zenity/default.nix
+++ b/pkgs/desktops/gnome-2/desktop/zenity/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, cairo, libxml2, libxslt, glib, gtk, pango, atk
+{ stdenv, fetchurl, pkgconfig, libxml2, libxslt, gtk
 , gnome-doc-utils, intltool, libglade, libX11, which, docbook_xml_dtd_412 }:
 
 stdenv.mkDerivation {
diff --git a/pkgs/desktops/gnome-2/platform/gnome-vfs-monikers/default.nix b/pkgs/desktops/gnome-2/platform/gnome-vfs-monikers/default.nix
index 029d751e7190..5ae126df331c 100644
--- a/pkgs/desktops/gnome-2/platform/gnome-vfs-monikers/default.nix
+++ b/pkgs/desktops/gnome-2/platform/gnome-vfs-monikers/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, pkgconfig, glib, intltool, gnome_vfs, libbonobo, ORBit2}:
+{stdenv, fetchurl, pkgconfig, glib, intltool, gnome_vfs, libbonobo}:
 
 stdenv.mkDerivation {
   name = "gnome-vfs-monikers-2.15.3";
diff --git a/pkgs/desktops/gnome-2/platform/libbonobo/default.nix b/pkgs/desktops/gnome-2/platform/libbonobo/default.nix
index ee0bf5f82a09..bf0cec8dfbe6 100644
--- a/pkgs/desktops/gnome-2/platform/libbonobo/default.nix
+++ b/pkgs/desktops/gnome-2/platform/libbonobo/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, flex, bison, pkgconfig, glib, dbus-glib, libxml2, popt
+{ stdenv, fetchurl, flex, bison, pkgconfig, glib, libxml2, popt
 , intltool, ORBit2, procps }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/desktops/gnome-2/platform/libgnome/default.nix b/pkgs/desktops/gnome-2/platform/libgnome/default.nix
index 2dcb85235ee4..42f47bc5a83f 100644
--- a/pkgs/desktops/gnome-2/platform/libgnome/default.nix
+++ b/pkgs/desktops/gnome-2/platform/libgnome/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, pkgconfig, glib, popt, zlib, libcanberra-gtk2
-, intltool, libbonobo, GConf, gnome_vfs, ORBit2, libtool, libogg
+, intltool, libbonobo, GConf, gnome_vfs, libtool, libogg
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/desktops/gnome-3/apps/gnome-characters/default.nix b/pkgs/desktops/gnome-3/apps/gnome-characters/default.nix
index b07417ecc35a..b5525957d468 100644
--- a/pkgs/desktops/gnome-3/apps/gnome-characters/default.nix
+++ b/pkgs/desktops/gnome-3/apps/gnome-characters/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, meson, ninja, pkgconfig, gettext, gnome3, glib, gtk3, pango, wrapGAppsHook
-, gobjectIntrospection, gjs, gdk_pixbuf, librsvg, libunistring }:
+, gobjectIntrospection, gjs, libunistring }:
 
 stdenv.mkDerivation rec {
   name = "gnome-characters-${version}";
diff --git a/pkgs/desktops/gnome-3/apps/gnome-documents/default.nix b/pkgs/desktops/gnome-3/apps/gnome-documents/default.nix
index 7db21d9e7483..a7d4288c9eb5 100644
--- a/pkgs/desktops/gnome-3/apps/gnome-documents/default.nix
+++ b/pkgs/desktops/gnome-3/apps/gnome-documents/default.nix
@@ -1,10 +1,10 @@
 { stdenv, meson, ninja, gettext, fetchurl, evince, gjs
 , pkgconfig, gtk3, glib, tracker, tracker-miners
-, itstool, libxslt, webkitgtk, libgdata, gnome-online-accounts
+, itstool, libxslt, webkitgtk, libgdata
 , gnome-desktop, libzapojit, libgepub
-, gnome3, librsvg, gdk_pixbuf, libsoup, docbook_xsl
-, gobjectIntrospection, json-glib, inkscape, poppler_utils
-, gmp, desktop-file-utils, wrapGAppsHook }:
+, gnome3, gdk_pixbuf, libsoup, docbook_xsl
+, gobjectIntrospection, inkscape, poppler_utils
+, desktop-file-utils, wrapGAppsHook }:
 
 stdenv.mkDerivation rec {
   name = "gnome-documents-${version}";
diff --git a/pkgs/desktops/gnome-3/apps/gnome-music/default.nix b/pkgs/desktops/gnome-3/apps/gnome-music/default.nix
index 560d8446f088..eef91ec0fbb8 100644
--- a/pkgs/desktops/gnome-3/apps/gnome-music/default.nix
+++ b/pkgs/desktops/gnome-3/apps/gnome-music/default.nix
@@ -1,7 +1,7 @@
 { stdenv, meson, ninja, gettext, fetchurl, gdk_pixbuf, tracker
 , libxml2, python3, libnotify, wrapGAppsHook, libmediaart
 , gobjectIntrospection, gnome-online-accounts, grilo, grilo-plugins
-, pkgconfig, gtk3, glib, cairo, desktop-file-utils, appstream-glib
+, pkgconfig, gtk3, glib, desktop-file-utils, appstream-glib
 , itstool, gnome3, gst_all_1 }:
 
 python3.pkgs.buildPythonApplication rec {
diff --git a/pkgs/desktops/gnome-3/apps/polari/default.nix b/pkgs/desktops/gnome-3/apps/polari/default.nix
index 4ae67f9b41d6..d3bb75d1f97d 100644
--- a/pkgs/desktops/gnome-3/apps/polari/default.nix
+++ b/pkgs/desktops/gnome-3/apps/polari/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, itstool, fetchurl, fetchpatch, gdk_pixbuf, adwaita-icon-theme
+{ stdenv, itstool, fetchurl, gdk_pixbuf, adwaita-icon-theme
 , telepathy-glib, gjs, meson, ninja, gettext, telepathy-idle, libxml2, desktop-file-utils
 , pkgconfig, gtk3, glib, libsecret, libsoup, gobjectIntrospection, appstream-glib
 , gnome3, wrapGAppsHook, telepathy-logger, gspell }:
diff --git a/pkgs/desktops/gnome-3/apps/seahorse/default.nix b/pkgs/desktops/gnome-3/apps/seahorse/default.nix
index 60e8822135ce..1bcf77839007 100644
--- a/pkgs/desktops/gnome-3/apps/seahorse/default.nix
+++ b/pkgs/desktops/gnome-3/apps/seahorse/default.nix
@@ -1,7 +1,7 @@
 { stdenv, intltool, fetchurl, vala
 , pkgconfig, gtk3, glib
 , wrapGAppsHook, itstool, gnupg, libsoup
-, gnome3, librsvg, gdk_pixbuf, gpgme
+, gnome3, gpgme
 , libsecret, avahi, p11-kit, openssh }:
 
 let
diff --git a/pkgs/desktops/gnome-3/core/dconf/default.nix b/pkgs/desktops/gnome-3/core/dconf/default.nix
index 400b3ea9a9b0..71779c172807 100644
--- a/pkgs/desktops/gnome-3/core/dconf/default.nix
+++ b/pkgs/desktops/gnome-3/core/dconf/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, meson, ninja, python3, vala, libxslt, pkgconfig, glib, dbus-glib, gnome3
-, libxml2, docbook_xsl, makeWrapper }:
+, libxml2, docbook_xsl }:
 
 let
   pname = "dconf";
diff --git a/pkgs/desktops/gnome-3/core/empathy/default.nix b/pkgs/desktops/gnome-3/core/empathy/default.nix
index 98cfc686e978..089c32d602ea 100644
--- a/pkgs/desktops/gnome-3/core/empathy/default.nix
+++ b/pkgs/desktops/gnome-3/core/empathy/default.nix
@@ -1,12 +1,12 @@
 { stdenv, intltool, fetchurl, webkitgtk, pkgconfig, gtk3, glib
 , file, librsvg, gnome3, gdk_pixbuf
-, dbus-glib, telepathy-glib, telepathy-farstream
+, telepathy-glib, telepathy-farstream
 , clutter-gtk, clutter-gst, gst_all_1, cogl, gnome-online-accounts
 , gcr, libsecret, folks, libpulseaudio, telepathy-mission-control
 , telepathy-logger, libnotify, clutter, libsoup, gnutls
 , evolution-data-server, yelp-xsl
 , libcanberra-gtk3, p11-kit, farstream, libtool, shared-mime-info
-, bash, wrapGAppsHook, itstool, libxml2, libxslt, icu, libgee
+, wrapGAppsHook, itstool, libxml2, libxslt, icu, libgee
 , isocodes, enchant, libchamplain, geoclue2, geocode-glib, cheese, libgudev }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/desktops/gnome-3/core/gdm/default.nix b/pkgs/desktops/gnome-3/core/gdm/default.nix
index 2f7452dbc572..5ceba1a77194 100644
--- a/pkgs/desktops/gnome-3/core/gdm/default.nix
+++ b/pkgs/desktops/gnome-3/core/gdm/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, substituteAll, pkgconfig, glib, itstool, libxml2, xorg, dbus
+{ stdenv, fetchurl, substituteAll, pkgconfig, glib, itstool, libxml2, xorg
 , intltool, accountsservice, libX11, gnome3, systemd, autoreconfHook
 , gtk, libcanberra-gtk3, pam, libtool, gobjectIntrospection, plymouth
 , librsvg, coreutils, xwayland }:
diff --git a/pkgs/desktops/gnome-3/core/gnome-shell/default.nix b/pkgs/desktops/gnome-3/core/gnome-shell/default.nix
index 772df5d24417..c3b2f97f9b2f 100644
--- a/pkgs/desktops/gnome-3/core/gnome-shell/default.nix
+++ b/pkgs/desktops/gnome-3/core/gnome-shell/default.nix
@@ -2,7 +2,7 @@
 , python3Packages, libsoup, polkit, clutter, networkmanager, docbook_xsl , docbook_xsl_ns, at-spi2-core
 , libstartup_notification, telepathy-glib, telepathy-logger, libXtst, unzip, glibcLocales, shared-mime-info
 , libgweather, libcanberra-gtk3, librsvg, geoclue2, perl, docbook_xml_dtd_42, desktop-file-utils
-, libpulseaudio, libical, nss, gobjectIntrospection, gstreamer, wrapGAppsHook
+, libpulseaudio, libical, gobjectIntrospection, gstreamer, wrapGAppsHook
 , accountsservice, gdk_pixbuf, gdm, upower, ibus, networkmanagerapplet
 , sassc, systemd, gst_all_1 }:
 
diff --git a/pkgs/desktops/gnome-3/core/gnome-user-docs/default.nix b/pkgs/desktops/gnome-3/core/gnome-user-docs/default.nix
index 6cb827bc504f..1938c90a8254 100644
--- a/pkgs/desktops/gnome-3/core/gnome-user-docs/default.nix
+++ b/pkgs/desktops/gnome-3/core/gnome-user-docs/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, file, gnome3, itstool, libxml2, intltool }:
+{ stdenv, fetchurl, pkgconfig, gnome3, itstool, libxml2, intltool }:
 
 stdenv.mkDerivation rec {
   name = "gnome-user-docs-${version}";
diff --git a/pkgs/desktops/gnome-3/core/gnome-user-share/default.nix b/pkgs/desktops/gnome-3/core/gnome-user-share/default.nix
index 509c10d75648..da117a536911 100644
--- a/pkgs/desktops/gnome-3/core/gnome-user-share/default.nix
+++ b/pkgs/desktops/gnome-3/core/gnome-user-share/default.nix
@@ -1,6 +1,6 @@
 { stdenv, intltool, fetchurl, apacheHttpd, nautilus
-, pkgconfig, gtk3, glib, libxml2, gnused, systemd
-, bash, wrapGAppsHook, itstool, libnotify, libtool, mod_dnssd
+, pkgconfig, gtk3, glib, libxml2, systemd
+, wrapGAppsHook, itstool, libnotify, libtool, mod_dnssd
 , gnome3, librsvg, gdk_pixbuf, file, libcanberra-gtk3 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/desktops/gnome-3/core/grilo-plugins/default.nix b/pkgs/desktops/gnome-3/core/grilo-plugins/default.nix
index c6000352ab06..35e2012c5313 100644
--- a/pkgs/desktops/gnome-3/core/grilo-plugins/default.nix
+++ b/pkgs/desktops/gnome-3/core/grilo-plugins/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, file, intltool, glib, sqlite
+{ stdenv, fetchurl, pkgconfig, intltool, sqlite
 , gnome3, libxml2, gupnp, gssdp, lua5, liboauth, gupnp-av
 , gmime, json-glib, avahi, tracker, dleyna-server, itstool }:
 
diff --git a/pkgs/desktops/gnome-3/core/gsettings-desktop-schemas/default.nix b/pkgs/desktops/gnome-3/core/gsettings-desktop-schemas/default.nix
index e5ca314c69af..5dc6137c9fca 100644
--- a/pkgs/desktops/gnome-3/core/gsettings-desktop-schemas/default.nix
+++ b/pkgs/desktops/gnome-3/core/gsettings-desktop-schemas/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, pkgconfig, intltool, glib, gobjectIntrospection
   # just for passthru
-, gnome3, gtk3, gsettings-desktop-schemas }:
+, gnome3 }:
 
 stdenv.mkDerivation rec {
   name = "gsettings-desktop-schemas-${version}";
diff --git a/pkgs/desktops/gnome-3/core/gucharmap/default.nix b/pkgs/desktops/gnome-3/core/gucharmap/default.nix
index 1562c42b374a..861702a3986e 100644
--- a/pkgs/desktops/gnome-3/core/gucharmap/default.nix
+++ b/pkgs/desktops/gnome-3/core/gucharmap/default.nix
@@ -1,5 +1,5 @@
 { stdenv, intltool, fetchFromGitLab, pkgconfig, gtk3, defaultIconTheme
-, glib, desktop-file-utils, bash, appdata-tools, gtk-doc, autoconf, automake, libtool
+, glib, desktop-file-utils, appdata-tools, gtk-doc, autoconf, automake, libtool
 , wrapGAppsHook, gnome3, itstool, libxml2
 , callPackage, unzip, gobjectIntrospection }:
 
diff --git a/pkgs/desktops/gnome-3/core/nautilus/default.nix b/pkgs/desktops/gnome-3/core/nautilus/default.nix
index 2daaf2d43261..5beabd08fa3a 100644
--- a/pkgs/desktops/gnome-3/core/nautilus/default.nix
+++ b/pkgs/desktops/gnome-3/core/nautilus/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, meson, ninja, pkgconfig, gettext, libxml2, desktop-file-utils, wrapGAppsHook
-, gtk, gnome3, gnome-autoar, glib, dbus-glib, shared-mime-info, libnotify, libexif
+, gtk, gnome3, gnome-autoar, dbus-glib, shared-mime-info, libnotify, libexif
 , exempi, librsvg, tracker, tracker-miners, gnome-desktop, gexiv2, libselinux, gdk_pixbuf }:
 
 let
diff --git a/pkgs/desktops/gnome-3/core/sushi/default.nix b/pkgs/desktops/gnome-3/core/sushi/default.nix
index 114c0d8ac960..100a2727fc3c 100644
--- a/pkgs/desktops/gnome-3/core/sushi/default.nix
+++ b/pkgs/desktops/gnome-3/core/sushi/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, pkgconfig, file, intltool, gobjectIntrospection, glib
-, clutter-gtk, clutter-gst, gnome3, gtksourceview, libmusicbrainz
+, clutter-gtk, clutter-gst, gnome3, gtksourceview
 , webkitgtk, libmusicbrainz5, icu, makeWrapper, gst_all_1
 , gdk_pixbuf, librsvg, gtk3, harfbuzz }:
 
diff --git a/pkgs/desktops/gnome-3/core/totem/default.nix b/pkgs/desktops/gnome-3/core/totem/default.nix
index 7cf1872da5a9..1a7e257f9297 100644
--- a/pkgs/desktops/gnome-3/core/totem/default.nix
+++ b/pkgs/desktops/gnome-3/core/totem/default.nix
@@ -1,7 +1,7 @@
-{ stdenv, fetchurl, meson, ninja, intltool, gst_all_1, clutter
+{ stdenv, fetchurl, meson, ninja, intltool, gst_all_1
 , clutter-gtk, clutter-gst, python3Packages, shared-mime-info
 , pkgconfig, gtk3, glib, gobjectIntrospection
-, bash, wrapGAppsHook, itstool, libxml2, vala, gnome3, librsvg
+, wrapGAppsHook, itstool, libxml2, vala, gnome3
 , gdk_pixbuf, tracker, nautilus }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/desktops/gnome-3/core/vte/default.nix b/pkgs/desktops/gnome-3/core/vte/default.nix
index ed313221e56a..17385ab72029 100644
--- a/pkgs/desktops/gnome-3/core/vte/default.nix
+++ b/pkgs/desktops/gnome-3/core/vte/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, intltool, pkgconfig
 , gnome3, ncurses, gobjectIntrospection, vala, libxml2, gnutls
-, fetchFromGitHub, autoconf, automake, libtool, gtk-doc, gperf, pcre2
+, gperf, pcre2
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/desktops/gnome-3/core/yelp-xsl/default.nix b/pkgs/desktops/gnome-3/core/yelp-xsl/default.nix
index f904a90454f3..6abaff8e32be 100644
--- a/pkgs/desktops/gnome-3/core/yelp-xsl/default.nix
+++ b/pkgs/desktops/gnome-3/core/yelp-xsl/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, intltool, fetchurl, pkgconfig, bash
+{ stdenv, intltool, fetchurl, pkgconfig
 , itstool, libxml2, libxslt, gnome3 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/desktops/gnome-3/core/zenity/default.nix b/pkgs/desktops/gnome-3/core/zenity/default.nix
index b97881063427..7f9996d17d99 100644
--- a/pkgs/desktops/gnome-3/core/zenity/default.nix
+++ b/pkgs/desktops/gnome-3/core/zenity/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, cairo, libxml2, libxslt, gnome3, pango
+{ stdenv, fetchurl, pkgconfig, libxml2, libxslt, gnome3
 , gnome-doc-utils, intltool, libX11, which, itstool, wrapGAppsHook }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/desktops/gnome-3/extensions/system-monitor/default.nix b/pkgs/desktops/gnome-3/extensions/system-monitor/default.nix
index 47a0238a7fd5..395e90d263ef 100644
--- a/pkgs/desktops/gnome-3/extensions/system-monitor/default.nix
+++ b/pkgs/desktops/gnome-3/extensions/system-monitor/default.nix
@@ -1,4 +1,4 @@
-{ config, stdenv, substituteAll, fetchFromGitHub, glib, glib-networking, libgtop, pkgs }:
+{ stdenv, substituteAll, fetchFromGitHub, glib, glib-networking, libgtop }:
 
 stdenv.mkDerivation rec {
   name = "gnome-shell-system-monitor-${version}";
diff --git a/pkgs/desktops/gnome-3/extensions/topicons-plus/default.nix b/pkgs/desktops/gnome-3/extensions/topicons-plus/default.nix
index 84a9d26c2d76..f9c45f45ea4a 100644
--- a/pkgs/desktops/gnome-3/extensions/topicons-plus/default.nix
+++ b/pkgs/desktops/gnome-3/extensions/topicons-plus/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, glib, gettext, bash }:
+{ stdenv, fetchFromGitHub, glib, gettext }:
 
 stdenv.mkDerivation rec {
   name = "gnome-shell-extension-topicons-plus-${version}";
diff --git a/pkgs/desktops/gnome-3/misc/gfbgraph/default.nix b/pkgs/desktops/gnome-3/misc/gfbgraph/default.nix
index 8194e3f1699d..f8d296122235 100644
--- a/pkgs/desktops/gnome-3/misc/gfbgraph/default.nix
+++ b/pkgs/desktops/gnome-3/misc/gfbgraph/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, intltool, fetchurl, pkgconfig, glib
+{ stdenv, fetchurl, pkgconfig, glib
 , gnome3, libsoup, json-glib, gobjectIntrospection }:
 
 let
diff --git a/pkgs/desktops/gnome-3/misc/gitg/default.nix b/pkgs/desktops/gnome-3/misc/gitg/default.nix
index 32da3a9a4b81..d2dce9d6f1b8 100644
--- a/pkgs/desktops/gnome-3/misc/gitg/default.nix
+++ b/pkgs/desktops/gnome-3/misc/gitg/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchurl, vala, intltool, pkgconfig, gtk3, glib
 , json-glib, wrapGAppsHook, libpeas, bash, gobjectIntrospection
-, gnome3, gtkspell3, shared-mime-info, libgee, libgit2-glib, librsvg, libsecret
-, libsoup }:
+, gnome3, gtkspell3, shared-mime-info, libgee, libgit2-glib, libsecret
+ }:
 
 let
   pname = "gitg";
diff --git a/pkgs/desktops/gnome-3/misc/gnome-tweaks/default.nix b/pkgs/desktops/gnome-3/misc/gnome-tweaks/default.nix
index a7c69de44eb6..41206b71d42a 100644
--- a/pkgs/desktops/gnome-3/misc/gnome-tweaks/default.nix
+++ b/pkgs/desktops/gnome-3/misc/gnome-tweaks/default.nix
@@ -1,7 +1,7 @@
-{ stdenv, meson, ninja, gettext, fetchurl, atk
+{ stdenv, meson, ninja, gettext, fetchurl
 , pkgconfig, gtk3, glib, libsoup
-, bash, itstool, libxml2, python3Packages
-, gnome3, librsvg, gdk_pixbuf, file, libnotify, gobjectIntrospection, wrapGAppsHook }:
+, itstool, libxml2, python3Packages
+, gnome3, gdk_pixbuf, libnotify, gobjectIntrospection, wrapGAppsHook }:
 
 let
   pname = "gnome-tweaks";
diff --git a/pkgs/desktops/gnome-3/misc/libgda/default.nix b/pkgs/desktops/gnome-3/misc/libgda/default.nix
index ce7bb6f75b5c..a10675ab8033 100644
--- a/pkgs/desktops/gnome-3/misc/libgda/default.nix
+++ b/pkgs/desktops/gnome-3/misc/libgda/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, pkgconfig, intltool, itstool, libxml2, gtk3, openssl, gnome3
+{ stdenv, fetchurl, pkgconfig, intltool, itstool, libxml2, gtk3, openssl, gnome3
 , mysqlSupport ? false, mysql ? null
 , postgresSupport ? false, postgresql ? null
 }:
diff --git a/pkgs/desktops/gnustep/gworkspace/default.nix b/pkgs/desktops/gnustep/gworkspace/default.nix
index 210b72292fd6..d5018a4350f8 100644
--- a/pkgs/desktops/gnustep/gworkspace/default.nix
+++ b/pkgs/desktops/gnustep/gworkspace/default.nix
@@ -1,6 +1,5 @@
 { back, base, gui, gsmakeDerivation
 , fetchurl
-, sqlite
 , system_preferences
 }:
 let
diff --git a/pkgs/desktops/gnustep/make/gsmakeDerivation.nix b/pkgs/desktops/gnustep/make/gsmakeDerivation.nix
index 00b96cd2fac1..7bb287c3fa59 100644
--- a/pkgs/desktops/gnustep/make/gsmakeDerivation.nix
+++ b/pkgs/desktops/gnustep/make/gsmakeDerivation.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, make, makeWrapper, which }:
+{ stdenv, make, makeWrapper, which }:
 { buildInputs ? [], ...} @ args:
 stdenv.mkDerivation (args // {
   buildInputs = [ makeWrapper make which ] ++ buildInputs;
diff --git a/pkgs/desktops/lxqt/core/lxqt-config/default.nix b/pkgs/desktops/lxqt/core/lxqt-config/default.nix
index 191fe0796e88..ba4937a7227f 100644
--- a/pkgs/desktops/lxqt/core/lxqt-config/default.nix
+++ b/pkgs/desktops/lxqt/core/lxqt-config/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, cmake, pkgconfig, lxqt-build-tools, qtbase, qtx11extras, qttools, qtsvg, kwindowsystem, libkscreen, liblxqt, libqtxdg, libpthreadstubs, xorg }:
+{ stdenv, fetchFromGitHub, cmake, pkgconfig, lxqt-build-tools, qtbase, qtx11extras, qttools, qtsvg, kwindowsystem, libkscreen, liblxqt, libqtxdg, xorg }:
 
 stdenv.mkDerivation rec {
   name = "${pname}-${version}";
diff --git a/pkgs/desktops/lxqt/default.nix b/pkgs/desktops/lxqt/default.nix
index 40c25b3302ca..675368c9a69e 100644
--- a/pkgs/desktops/lxqt/default.nix
+++ b/pkgs/desktops/lxqt/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, makeScope, libsForQt5, fetchFromGitHub }:
+{ pkgs, makeScope, libsForQt5 }:
 
 let
   packages = self: with self; {
diff --git a/pkgs/desktops/mate/mate-applets/default.nix b/pkgs/desktops/mate/mate-applets/default.nix
index eda4e9b05bcd..59316039b36b 100644
--- a/pkgs/desktops/mate/mate-applets/default.nix
+++ b/pkgs/desktops/mate/mate-applets/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, intltool, itstool, gnome3, libwnck3, libgtop, libxml2, libnotify, dbus-glib, polkit, upower, wirelesstools, mate, hicolor-icon-theme, wrapGAppsHook }:
+{ stdenv, fetchurl, pkgconfig, intltool, itstool, gnome3, libwnck3, libgtop, libxml2, libnotify, polkit, upower, wirelesstools, mate, hicolor-icon-theme, wrapGAppsHook }:
 
 stdenv.mkDerivation rec {
   name = "mate-applets-${version}";
diff --git a/pkgs/desktops/mate/mate-settings-daemon/default.nix b/pkgs/desktops/mate/mate-settings-daemon/default.nix
index 6a24e67d2c70..4138a042856b 100644
--- a/pkgs/desktops/mate/mate-settings-daemon/default.nix
+++ b/pkgs/desktops/mate/mate-settings-daemon/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, intltool, glib, dbus-glib, libxklavier, libcanberra-gtk3, libnotify, nss, polkit, gnome3, mate, wrapGAppsHook
+{ stdenv, fetchurl, pkgconfig, intltool, dbus-glib, libxklavier, libcanberra-gtk3, libnotify, nss, polkit, gnome3, mate, wrapGAppsHook
 , pulseaudioSupport ? stdenv.config.pulseaudio or true, libpulseaudio
 }:
 
diff --git a/pkgs/desktops/mate/mate-themes/default.nix b/pkgs/desktops/mate/mate-themes/default.nix
index 8d6d470727dd..bdf5ac29ca61 100644
--- a/pkgs/desktops/mate/mate-themes/default.nix
+++ b/pkgs/desktops/mate/mate-themes/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, intltool, mate, gnome3, gtk2, gtk_engines,
+{ stdenv, fetchurl, pkgconfig, intltool, mate, gtk2, gtk_engines,
   gtk-engine-murrine, gdk_pixbuf, librsvg }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/desktops/plasma-5/default.nix b/pkgs/desktops/plasma-5/default.nix
index 0b1668038f59..2c99713bcd4a 100644
--- a/pkgs/desktops/plasma-5/default.nix
+++ b/pkgs/desktops/plasma-5/default.nix
@@ -26,8 +26,7 @@ existing packages here and modify it as necessary.
 
 {
   libsForQt5, lib, fetchurl,
-  gconf, gsettings-desktop-schemas,
-  debug ? false,
+  gconf, gsettings-desktop-schemas
 }:
 
 let
diff --git a/pkgs/desktops/plasma-5/kdeplasma-addons.nix b/pkgs/desktops/plasma-5/kdeplasma-addons.nix
index e23ffd3644a0..398fc356fc93 100644
--- a/pkgs/desktops/plasma-5/kdeplasma-addons.nix
+++ b/pkgs/desktops/plasma-5/kdeplasma-addons.nix
@@ -1,7 +1,7 @@
 {
   mkDerivation,
   extra-cmake-modules, kdoctools,
-  kconfig, kconfigwidgets, kcoreaddons, kcmutils, kdelibs4support, ki18n, kio,
+  kconfig, kconfigwidgets, kcoreaddons, kcmutils, kdelibs4support, kio,
   knewstuff, kross, krunner, kservice, ksysguard, kunitconversion, ibus,
   plasma-framework, plasma-workspace, qtdeclarative, qtx11extras, kholidays
 }:
diff --git a/pkgs/desktops/plasma-5/kwin/default.nix b/pkgs/desktops/plasma-5/kwin/default.nix
index 2c9d824999e2..a0b09e30338f 100644
--- a/pkgs/desktops/plasma-5/kwin/default.nix
+++ b/pkgs/desktops/plasma-5/kwin/default.nix
@@ -1,5 +1,5 @@
 {
-  mkDerivation, lib, copyPathsToStore, fetchpatch,
+  mkDerivation, lib, copyPathsToStore,
   extra-cmake-modules, kdoctools,
 
   epoxy,libICE, libSM, libinput, libxkbcommon, udev, wayland, xcb-util-cursor,
diff --git a/pkgs/desktops/xfce/applications/xfce4-screenshooter.nix b/pkgs/desktops/xfce/applications/xfce4-screenshooter.nix
index 28c586382b46..8e5bffd9dd6f 100644
--- a/pkgs/desktops/xfce/applications/xfce4-screenshooter.nix
+++ b/pkgs/desktops/xfce/applications/xfce4-screenshooter.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, pkgconfig, intltool, xfce4-panel, libxfce4util, gtk, libsoup
-, makeWrapper, glib-networking, exo, hicolor-icon-theme, wrapGAppsHook }:
+, glib-networking, exo, hicolor-icon-theme, wrapGAppsHook }:
 
 stdenv.mkDerivation rec {
   p_name  = "xfce4-screenshooter";
diff --git a/pkgs/desktops/xfce/core/xfce4-session.nix b/pkgs/desktops/xfce/core/xfce4-session.nix
index 2d5a169a215d..3f6237d6de17 100644
--- a/pkgs/desktops/xfce/core/xfce4-session.nix
+++ b/pkgs/desktops/xfce/core/xfce4-session.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, pkgconfig, intltool, gtk, polkit
+{ stdenv, fetchurl, pkgconfig, intltool, gtk, polkit
 , libxfce4util, libxfce4ui, xfce4-panel, libwnck, dbus-glib, xfconf, libglade, xorg
 , hicolor-icon-theme
 }:
diff --git a/pkgs/desktops/xfce/panel-plugins/xfce4-vala-panel-appmenu-plugin/appmenu-gtk-module.nix b/pkgs/desktops/xfce/panel-plugins/xfce4-vala-panel-appmenu-plugin/appmenu-gtk-module.nix
index 4db9e03ae721..7134d29c9ffb 100644
--- a/pkgs/desktops/xfce/panel-plugins/xfce4-vala-panel-appmenu-plugin/appmenu-gtk-module.nix
+++ b/pkgs/desktops/xfce/panel-plugins/xfce4-vala-panel-appmenu-plugin/appmenu-gtk-module.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, substituteAll, cmake, vala, glib, gtk2, gtk3 }:
+{ stdenv, fetchFromGitHub, cmake, vala, glib, gtk2, gtk3 }:
 stdenv.mkDerivation rec {
   name = "vala-panel-appmenu-xfce-${version}";
   version = "0.6.94";
diff --git a/pkgs/development/arduino/platformio/default.nix b/pkgs/development/arduino/platformio/default.nix
index dfdd8141aaaa..45186914604d 100644
--- a/pkgs/development/arduino/platformio/default.nix
+++ b/pkgs/development/arduino/platformio/default.nix
@@ -1,5 +1,5 @@
 
-{ pkgs, newScope }:
+{ newScope }:
 
 let
   callPackage = newScope self;
diff --git a/pkgs/development/compilers/boo/default.nix b/pkgs/development/compilers/boo/default.nix
index 968c845a0119..ec5e08ffda40 100644
--- a/pkgs/development/compilers/boo/default.nix
+++ b/pkgs/development/compilers/boo/default.nix
@@ -1,6 +1,5 @@
-{ stdenv, fetchFromGitHub, pkgconfig, dbus, mono, makeWrapper, nant
-, shared-mime-info, gtksourceview, gtk2
-, targetVersion ? "4.5" }:
+{ stdenv, fetchFromGitHub, pkgconfig, mono, makeWrapper, nant
+, shared-mime-info, gtksourceview, gtk2 }:
 
 let
   release = "alpha";
diff --git a/pkgs/development/compilers/chicken/eggDerivation.nix b/pkgs/development/compilers/chicken/eggDerivation.nix
index bcb7a763fb6b..2a14a997e57d 100644
--- a/pkgs/development/compilers/chicken/eggDerivation.nix
+++ b/pkgs/development/compilers/chicken/eggDerivation.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchegg, chicken, makeWrapper }:
+{ stdenv, chicken, makeWrapper }:
 { name, src
 , buildInputs ? []
 , chickenInstallFlags ? []
diff --git a/pkgs/development/compilers/clasp/default.nix b/pkgs/development/compilers/clasp/default.nix
index 6bfb71a9627d..6ff2028e3c16 100644
--- a/pkgs/development/compilers/clasp/default.nix
+++ b/pkgs/development/compilers/clasp/default.nix
@@ -1,7 +1,7 @@
 {stdenv, fetchFromGitHub
   , llvmPackages
   , cmake, boehmgc, gmp, zlib, ncurses, boost
-  , waf, python, git, sbcl
+  , python, git, sbcl
 }:
 stdenv.mkDerivation rec {
   name = "${pname}-${version}";
diff --git a/pkgs/development/compilers/cudatoolkit/default.nix b/pkgs/development/compilers/cudatoolkit/default.nix
index b7c310cf01d2..e44c21abe946 100644
--- a/pkgs/development/compilers/cudatoolkit/default.nix
+++ b/pkgs/development/compilers/cudatoolkit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, makeWrapper, fetchurl, requireFile, patchelf, perl, ncurses, expat, python27, zlib
+{ lib, stdenv, makeWrapper, fetchurl, requireFile, perl, ncurses, expat, python27, zlib
 , gcc48, gcc49, gcc5, gcc6
 , xorg, gtk2, glib, fontconfig, freetype, unixODBC, alsaLib, glibc
 }:
diff --git a/pkgs/development/compilers/dotnet/sdk/default.nix b/pkgs/development/compilers/dotnet/sdk/default.nix
index e7cb7495c90e..f16be1b28225 100644
--- a/pkgs/development/compilers/dotnet/sdk/default.nix
+++ b/pkgs/development/compilers/dotnet/sdk/default.nix
@@ -6,7 +6,6 @@
 , libuuid
 , zlib
 , curl
-, patchelf
 }:
 
 let
diff --git a/pkgs/development/compilers/elm/default.nix b/pkgs/development/compilers/elm/default.nix
index 8ed34cf9d1e0..6a8d5f11b75c 100644
--- a/pkgs/development/compilers/elm/default.nix
+++ b/pkgs/development/compilers/elm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildEnv, haskell, nodejs, fetchurl, fetchpatch, makeWrapper }:
+{ lib, stdenv, buildEnv, haskell, nodejs, fetchurl, makeWrapper }:
 
 # To update:
 # 1) Update versions in ./update-elm.rb and run it.
diff --git a/pkgs/development/compilers/emscripten/default.nix b/pkgs/development/compilers/emscripten/default.nix
index 8e268aa7eb74..e03039cb5e14 100644
--- a/pkgs/development/compilers/emscripten/default.nix
+++ b/pkgs/development/compilers/emscripten/default.nix
@@ -1,5 +1,5 @@
-{ emscriptenVersion, stdenv, fetchFromGitHub, emscriptenfastcomp, python, nodejs, closurecompiler, pkgs
-, jre, binaryen, enableWasm ? true ,  python2Packages, cmake
+{ emscriptenVersion, stdenv, fetchFromGitHub, emscriptenfastcomp, python, nodejs, closurecompiler
+, jre, binaryen, enableWasm ? true ,  cmake
 }:
 
 let
diff --git a/pkgs/development/compilers/emscripten/fastcomp/emscripten-fastcomp.nix b/pkgs/development/compilers/emscripten/fastcomp/emscripten-fastcomp.nix
index 5317cf25d41b..06acebd2ba4a 100644
--- a/pkgs/development/compilers/emscripten/fastcomp/emscripten-fastcomp.nix
+++ b/pkgs/development/compilers/emscripten/fastcomp/emscripten-fastcomp.nix
@@ -1,4 +1,4 @@
-{ emscriptenVersion, stdenv, llvm, fetchFromGitHub, cmake, python, gtest, ... }:
+{ emscriptenVersion, stdenv, fetchFromGitHub, cmake, python, gtest, ... }:
 
 let
   rev = emscriptenVersion;
diff --git a/pkgs/development/compilers/factor-lang/default.nix b/pkgs/development/compilers/factor-lang/default.nix
index ce1987866007..4dab2e06f48e 100644
--- a/pkgs/development/compilers/factor-lang/default.nix
+++ b/pkgs/development/compilers/factor-lang/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub, glib, glibc, git,
+{ stdenv, fetchurl, fetchFromGitHub, glib, git,
   rlwrap, curl, pkgconfig, perl, makeWrapper, tzdata, ncurses,
   libX11, pango, cairo, gtk2, gdk_pixbuf, gtkglext,
   libGLU, libXmu, libXt, libICE, libSM }:
diff --git a/pkgs/development/compilers/gambit/build.nix b/pkgs/development/compilers/gambit/build.nix
index 202e55254222..72530f99cdbc 100644
--- a/pkgs/development/compilers/gambit/build.nix
+++ b/pkgs/development/compilers/gambit/build.nix
@@ -1,4 +1,4 @@
-{ stdenv, git, openssl, autoconf, pkgs, makeStaticLibraries, version, git-version, SRC }:
+{ stdenv, git, openssl, autoconf, pkgs, makeStaticLibraries, version, SRC }:
 
 stdenv.mkDerivation rec {
   name    = "gambit-${version}";
diff --git a/pkgs/development/compilers/gambit/default.nix b/pkgs/development/compilers/gambit/default.nix
index 93f1d9184b4d..77e8fb51602c 100644
--- a/pkgs/development/compilers/gambit/default.nix
+++ b/pkgs/development/compilers/gambit/default.nix
@@ -2,7 +2,6 @@
 
 callPackage ./build.nix {
   version = "4.8.9";
-  git-version = "4.8.9";
 
   SRC = fetchurl {
     url = "http://www.iro.umontreal.ca/~gambit/download/gambit/v4.8/source/gambit-v4_8_9-devel.tgz";
diff --git a/pkgs/development/compilers/gambit/unstable.nix b/pkgs/development/compilers/gambit/unstable.nix
index 545bece12c48..169ddb5a6a31 100644
--- a/pkgs/development/compilers/gambit/unstable.nix
+++ b/pkgs/development/compilers/gambit/unstable.nix
@@ -2,7 +2,6 @@
 
 callPackage ./build.nix {
   version = "unstable-2018-05-30";
-  git-version = "4.8.9-54-gffe8841b";
   SRC = fetchgit {
     url = "https://github.com/feeley/gambit.git";
     rev = "ffe8841b56330eb86fd794b16dc7f83914ecc7c5";
diff --git a/pkgs/development/compilers/gcc/4.8/default.nix b/pkgs/development/compilers/gcc/4.8/default.nix
index 15071fd2ba5e..943391611de1 100644
--- a/pkgs/development/compilers/gcc/4.8/default.nix
+++ b/pkgs/development/compilers/gcc/4.8/default.nix
@@ -28,7 +28,6 @@
 , # Strip kills static libs of other archs (hence no cross)
   stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
 , gnused ? null
-, darwin ? null
 , buildPlatform, hostPlatform, targetPlatform
 , buildPackages
 }:
diff --git a/pkgs/development/compilers/gcc/4.9/default.nix b/pkgs/development/compilers/gcc/4.9/default.nix
index 006cbdf40dc2..bf3b192e1bbd 100644
--- a/pkgs/development/compilers/gcc/4.9/default.nix
+++ b/pkgs/development/compilers/gcc/4.9/default.nix
@@ -28,7 +28,6 @@
 , # Strip kills static libs of other archs (hence no cross)
   stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
 , gnused ? null
-, darwin ? null
 , buildPlatform, hostPlatform, targetPlatform
 , buildPackages
 }:
diff --git a/pkgs/development/compilers/gcc/5/default.nix b/pkgs/development/compilers/gcc/5/default.nix
index f360ed135d73..0564329967e5 100644
--- a/pkgs/development/compilers/gcc/5/default.nix
+++ b/pkgs/development/compilers/gcc/5/default.nix
@@ -29,7 +29,6 @@
   stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
 , gnused ? null
 , cloog # unused; just for compat with gcc4, as we override the parameter on some places
-, darwin ? null
 , buildPlatform, hostPlatform, targetPlatform
 , buildPackages
 }:
diff --git a/pkgs/development/compilers/gcc/6/default.nix b/pkgs/development/compilers/gcc/6/default.nix
index 02a003501621..50d55aef2342 100644
--- a/pkgs/development/compilers/gcc/6/default.nix
+++ b/pkgs/development/compilers/gcc/6/default.nix
@@ -29,7 +29,6 @@
   stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
 , gnused ? null
 , cloog # unused; just for compat with gcc4, as we override the parameter on some places
-, darwin ? null
 , buildPlatform, hostPlatform, targetPlatform
 , buildPackages
 }:
diff --git a/pkgs/development/compilers/gcc/7/default.nix b/pkgs/development/compilers/gcc/7/default.nix
index 84323cca823a..0c51868aef8d 100644
--- a/pkgs/development/compilers/gcc/7/default.nix
+++ b/pkgs/development/compilers/gcc/7/default.nix
@@ -22,7 +22,6 @@
   stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
 , gnused ? null
 , cloog # unused; just for compat with gcc4, as we override the parameter on some places
-, darwin ? null
 , buildPlatform, hostPlatform, targetPlatform
 , buildPackages
 }:
diff --git a/pkgs/development/compilers/gcc/8/default.nix b/pkgs/development/compilers/gcc/8/default.nix
index 85c03bc440ff..38d8bcd83cf5 100644
--- a/pkgs/development/compilers/gcc/8/default.nix
+++ b/pkgs/development/compilers/gcc/8/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, targetPackages, fetchurl, fetchpatch, noSysDirs
+{ stdenv, targetPackages, fetchurl, noSysDirs
 , langC ? true, langCC ? true, langFortran ? false
 , langObjC ? targetPlatform.isDarwin
 , langObjCpp ? targetPlatform.isDarwin
@@ -22,7 +22,6 @@
   stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
 , gnused ? null
 , cloog # unused; just for compat with gcc4, as we override the parameter on some places
-, darwin ? null
 , buildPlatform, hostPlatform, targetPlatform
 , buildPackages
 }:
diff --git a/pkgs/development/compilers/gcc/snapshot/default.nix b/pkgs/development/compilers/gcc/snapshot/default.nix
index b00f180bbc7c..124fdbcdf9d4 100644
--- a/pkgs/development/compilers/gcc/snapshot/default.nix
+++ b/pkgs/development/compilers/gcc/snapshot/default.nix
@@ -22,7 +22,6 @@
   stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
 , gnused ? null
 , cloog # unused; just for compat with gcc4, as we override the parameter on some places
-, darwin ? null
 , flex ? null
 , buildPlatform, hostPlatform, targetPlatform
 , buildPackages
diff --git a/pkgs/development/compilers/gcl/2.6.13-pre.nix b/pkgs/development/compilers/gcl/2.6.13-pre.nix
index 2a80eccfb403..71a6eaa8db8d 100644
--- a/pkgs/development/compilers/gcl/2.6.13-pre.nix
+++ b/pkgs/development/compilers/gcl/2.6.13-pre.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchgit, mpfr, m4, binutils, fetchcvs, emacs, zlib, which
+{ stdenv, fetchgit, mpfr, m4, binutils, emacs, zlib, which
 , texinfo, libX11, xproto, inputproto, libXi, gmp, readline, strace
 , libXext, xextproto, libXt, libXaw, libXmu } :
 
diff --git a/pkgs/development/compilers/gcl/default.nix b/pkgs/development/compilers/gcl/default.nix
index 0e4d5bed0514..f503427b326e 100644
--- a/pkgs/development/compilers/gcl/default.nix
+++ b/pkgs/development/compilers/gcl/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, mpfr, m4, binutils, fetchcvs, emacs, zlib, which
+{ stdenv, fetchurl, mpfr, m4, binutils, emacs, zlib, which
 , texinfo, libX11, xproto, inputproto, libXi, gmp
 , libXext, xextproto, libXt, libXaw, libXmu } :
 
diff --git a/pkgs/development/compilers/gerbil/build.nix b/pkgs/development/compilers/gerbil/build.nix
index 5609de15d4cb..0ce9fbb00e2e 100644
--- a/pkgs/development/compilers/gerbil/build.nix
+++ b/pkgs/development/compilers/gerbil/build.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, makeStaticLibraries,
+{ stdenv, makeStaticLibraries,
   coreutils, rsync, bash,
   openssl, zlib, sqlite, libxml2, libyaml, mysql, lmdb, leveldb, postgresql,
   version, git-version, GAMBIT, SRC }:
diff --git a/pkgs/development/compilers/ghc/7.10.3.nix b/pkgs/development/compilers/ghc/7.10.3.nix
index 2a906d918aa3..0cf3a4cb12b4 100644
--- a/pkgs/development/compilers/ghc/7.10.3.nix
+++ b/pkgs/development/compilers/ghc/7.10.3.nix
@@ -3,10 +3,10 @@
 
 # build-tools
 , bootPkgs, hscolour
-, coreutils, fetchurl, fetchpatch, perl
+, coreutils, fetchurl, perl
 , docbook_xsl, docbook_xml_dtd_45, docbook_xml_dtd_42, libxml2, libxslt
 
-, libffi, libiconv ? null, ncurses
+, libiconv ? null, ncurses
 
 , useLLVM ? !targetPlatform.isx86
 , # LLVM is conceptually a run-time-only depedendency, but for
diff --git a/pkgs/development/compilers/ghc/8.0.2.nix b/pkgs/development/compilers/ghc/8.0.2.nix
index 8062e93df549..7671fcdb0252 100644
--- a/pkgs/development/compilers/ghc/8.0.2.nix
+++ b/pkgs/development/compilers/ghc/8.0.2.nix
@@ -5,7 +5,7 @@
 , bootPkgs, hscolour
 , coreutils, fetchpatch, fetchurl, perl, sphinx
 
-, libffi, libiconv ? null, ncurses
+, libiconv ? null, ncurses
 
 , useLLVM ? !targetPlatform.isx86
 , # LLVM is conceptually a run-time-only depedendency, but for
diff --git a/pkgs/development/compilers/ghc/8.2.2.nix b/pkgs/development/compilers/ghc/8.2.2.nix
index d740a7ee673b..c24cdeb43bfd 100644
--- a/pkgs/development/compilers/ghc/8.2.2.nix
+++ b/pkgs/development/compilers/ghc/8.2.2.nix
@@ -6,7 +6,7 @@
 , autoconf, autoreconfHook, automake, coreutils, fetchurl, fetchpatch, perl, python3, sphinx
 , runCommand
 
-, libffi, libiconv ? null, ncurses
+, libiconv ? null, ncurses
 
 , useLLVM ? !targetPlatform.isx86 || (targetPlatform.isMusl && hostPlatform != targetPlatform)
 , # LLVM is conceptually a run-time-only depedendency, but for
diff --git a/pkgs/development/compilers/ghc/8.4.3.nix b/pkgs/development/compilers/ghc/8.4.3.nix
index 182afa6b3496..c93fb1fd9b22 100644
--- a/pkgs/development/compilers/ghc/8.4.3.nix
+++ b/pkgs/development/compilers/ghc/8.4.3.nix
@@ -5,7 +5,7 @@
 , bootPkgs, alex, happy, hscolour
 , autoconf, automake, coreutils, fetchurl, fetchpatch, perl, python3, m4
 
-, libffi, libiconv ? null, ncurses
+, libiconv ? null, ncurses
 
 , useLLVM ? !targetPlatform.isx86 || (targetPlatform.isMusl && hostPlatform != targetPlatform)
 , # LLVM is conceptually a run-time-only depedendency, but for
diff --git a/pkgs/development/compilers/ghc/8.6.1.nix b/pkgs/development/compilers/ghc/8.6.1.nix
index 522ad32e69f4..ae22e1f1e406 100644
--- a/pkgs/development/compilers/ghc/8.6.1.nix
+++ b/pkgs/development/compilers/ghc/8.6.1.nix
@@ -3,9 +3,9 @@
 
 # build-tools
 , bootPkgs, alex, happy, hscolour
-, autoconf, automake, coreutils, fetchurl, fetchpatch, perl, python3, m4
+, autoconf, automake, coreutils, fetchurl, perl, python3, m4
 
-, libffi, libiconv ? null, ncurses
+, libiconv ? null, ncurses
 
 , useLLVM ? !targetPlatform.isx86 || (targetPlatform.isMusl && hostPlatform != targetPlatform)
 , # LLVM is conceptually a run-time-only depedendency, but for
diff --git a/pkgs/development/compilers/ghc/head.nix b/pkgs/development/compilers/ghc/head.nix
index 4c1e5d986dcf..2824ce669ee6 100644
--- a/pkgs/development/compilers/ghc/head.nix
+++ b/pkgs/development/compilers/ghc/head.nix
@@ -5,7 +5,7 @@
 , bootPkgs, alex, happy, hscolour
 , autoconf, automake, coreutils, fetchgit, perl, python3, m4
 
-, libffi, libiconv ? null, ncurses
+, libiconv ? null, ncurses
 
 , useLLVM ? !targetPlatform.isx86 || (targetPlatform.isMusl && hostPlatform != targetPlatform)
 , # LLVM is conceptually a run-time-only depedendency, but for
diff --git a/pkgs/development/compilers/ghcjs-ng/configured-ghcjs-src.nix b/pkgs/development/compilers/ghcjs-ng/configured-ghcjs-src.nix
index 57d9fccd266b..df1394e4a24b 100644
--- a/pkgs/development/compilers/ghcjs-ng/configured-ghcjs-src.nix
+++ b/pkgs/development/compilers/ghcjs-ng/configured-ghcjs-src.nix
@@ -4,7 +4,6 @@
 , python3
 , gcc
 , cabal-install
-, gmp
 , runCommand
 , lib
 , stdenv
diff --git a/pkgs/development/compilers/ghcjs/base.nix b/pkgs/development/compilers/ghcjs/base.nix
index f09a577110b7..46e9d8d72bed 100644
--- a/pkgs/development/compilers/ghcjs/base.nix
+++ b/pkgs/development/compilers/ghcjs/base.nix
@@ -3,7 +3,6 @@
 , broken ? false
 , test-framework
 , test-framework-hunit
-, test-framework-quickcheck2
 , data-default
 , ghc-paths
 , haskell-src-exts
@@ -20,10 +19,8 @@
 , transformers-compat
 , haddock-api
 , regex-posix
-, callPackage
 
 , bootPkgs, gmp
-, jailbreak-cabal
 
 , runCommand
 , nodejs, stdenv, filepath, HTTP, HUnit, mtl, network, QuickCheck, random, stm
@@ -32,11 +29,11 @@
 , lens
 , parallel, safe, shelly, split, stringsearch, syb
 , tar, terminfo
-, vector, yaml, fetchgit, fetchFromGitHub, Cabal
+, vector, yaml, fetchgit, fetchFromGitHub
 , alex, happy, git, gnumake, autoconf, patch
 , automake, libtool
 , cryptohash
-, haddock, hspec, xhtml, primitive, cacert, pkgs
+, haddock, hspec, xhtml, pkgs
 , coreutils
 , libiconv
 
diff --git a/pkgs/development/compilers/go/1.10.nix b/pkgs/development/compilers/go/1.10.nix
index b4fa005c3de8..272c953af7a1 100644
--- a/pkgs/development/compilers/go/1.10.nix
+++ b/pkgs/development/compilers/go/1.10.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchFromGitHub, tzdata, iana-etc, go_bootstrap, runCommand, writeScriptBin
 , perl, which, pkgconfig, patch, procps
 , pcre, cacert, llvm
-, Security, Foundation, bash
+, Security, Foundation
 , makeWrapper, git, subversion, mercurial, bazaar }:
 
 let
diff --git a/pkgs/development/compilers/go/1.9.nix b/pkgs/development/compilers/go/1.9.nix
index 8ef528e2c92a..cbaa427c8277 100644
--- a/pkgs/development/compilers/go/1.9.nix
+++ b/pkgs/development/compilers/go/1.9.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchFromGitHub, tzdata, iana-etc, go_bootstrap, runCommand, writeScriptBin
 , perl, which, pkgconfig, patch, procps
 , pcre, cacert, llvm
-, Security, Foundation, bash
+, Security, Foundation
 , makeWrapper, git, subversion, mercurial, bazaar }:
 
 let
diff --git a/pkgs/development/compilers/graalvm/default.nix b/pkgs/development/compilers/graalvm/default.nix
index 794467443715..52a49c519b39 100644
--- a/pkgs/development/compilers/graalvm/default.nix
+++ b/pkgs/development/compilers/graalvm/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, fetchhg, fetchurl, fetchzip, mercurial, python27, zlib, makeWrapper, oraclejdk8 }:
+{ stdenv, lib, fetchFromGitHub, fetchurl, fetchzip, mercurial, python27, zlib, makeWrapper, oraclejdk8 }:
 
 let
   # pre-download some cache entries ('mx' will not be able to download under nixbld1)
diff --git a/pkgs/development/compilers/haxe/default.nix b/pkgs/development/compilers/haxe/default.nix
index afeef2b3637c..0a974fccc888 100644
--- a/pkgs/development/compilers/haxe/default.nix
+++ b/pkgs/development/compilers/haxe/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchgit, bash, coreutils, ocaml, zlib, pcre, neko, camlp4 }:
+{ stdenv, fetchgit, coreutils, ocaml, zlib, pcre, neko, camlp4 }:
 
 let
   generic = { version, sha256, prePatch }:
diff --git a/pkgs/development/compilers/inform7/default.nix b/pkgs/development/compilers/inform7/default.nix
index 7f1830430c45..a6955c030519 100644
--- a/pkgs/development/compilers/inform7/default.nix
+++ b/pkgs/development/compilers/inform7/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, writeText, fetchzip, coreutils, perl, gnutar, gzip }:
+{ stdenv, fetchzip, coreutils, perl, gnutar, gzip }:
 let
   version = "6M62";
 in stdenv.mkDerivation {
diff --git a/pkgs/development/compilers/ios-cross-compile/9.2.nix b/pkgs/development/compilers/ios-cross-compile/9.2.nix
index 9c4b38f87ded..e64c0c912d94 100644
--- a/pkgs/development/compilers/ios-cross-compile/9.2.nix
+++ b/pkgs/development/compilers/ios-cross-compile/9.2.nix
@@ -1,6 +1,6 @@
 { stdenv, git, clang,
   fetchFromGitHub, requireFile,
-  openssl, xz, gnutar, gcc,
+  openssl, xz, gnutar,
   automake, autoconf, libtool, clangStdenv } :
 
 clangStdenv.mkDerivation rec {
diff --git a/pkgs/development/compilers/ispc/default.nix b/pkgs/development/compilers/ispc/default.nix
index 7aedf191abee..a5d6247ffdc7 100644
--- a/pkgs/development/compilers/ispc/default.nix
+++ b/pkgs/development/compilers/ispc/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchFromGitHub, fetchpatch, bash, which, m4, python, bison, flex, llvmPackages,
+{stdenv, fetchFromGitHub, fetchpatch, which, m4, python, bison, flex, llvmPackages,
 testedTargets ? ["sse2" "host"] # the default test target is sse4, but that is not supported by all Hydra agents
 }:
 
diff --git a/pkgs/development/compilers/julia/0.5.nix b/pkgs/development/compilers/julia/0.5.nix
index cff6c1c446f1..e503b7a92ce4 100644
--- a/pkgs/development/compilers/julia/0.5.nix
+++ b/pkgs/development/compilers/julia/0.5.nix
@@ -1,11 +1,10 @@
-{ stdenv, fetchgit, fetchurl, fetchzip
+{ stdenv, fetchurl, fetchzip
 # build tools
 , gfortran, m4, makeWrapper, patchelf, perl, which, python2
-, runCommand
 , paxctl
 # libjulia dependencies
 , libunwind, readline, utf8proc, zlib
-, llvm, libffi, ncurses
+, llvm
 # standard library dependencies
 , curl, fftwSinglePrec, fftw, gmp, libgit2, mpfr, openlibm, openspecfun, pcre2
 # linear algebra
diff --git a/pkgs/development/compilers/julia/0.6.nix b/pkgs/development/compilers/julia/0.6.nix
index 49bbaf0e8df1..fcf486b3b41a 100644
--- a/pkgs/development/compilers/julia/0.6.nix
+++ b/pkgs/development/compilers/julia/0.6.nix
@@ -1,11 +1,10 @@
-{ stdenv, fetchgit, fetchurl, fetchzip
+{ stdenv, fetchurl, fetchzip
 # build tools
 , gfortran, m4, makeWrapper, patchelf, perl, which, python2
-, runCommand
 , paxctl
 # libjulia dependencies
 , libunwind, readline, utf8proc, zlib
-, llvm, libffi, ncurses
+, llvm
 # standard library dependencies
 , curl, fftwSinglePrec, fftw, gmp, libgit2, mpfr, openlibm, openspecfun, pcre2
 # linear algebra
diff --git a/pkgs/development/compilers/julia/default.nix b/pkgs/development/compilers/julia/default.nix
index b5a3a8c6be2d..a504dc2ea463 100644
--- a/pkgs/development/compilers/julia/default.nix
+++ b/pkgs/development/compilers/julia/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchgit, fetchurl
+{ stdenv, fetchurl
 # build tools
 , gfortran, m4, makeWrapper, patchelf, perl, which, python2, paxctl
 # libjulia dependencies
diff --git a/pkgs/development/compilers/ldc/default.nix b/pkgs/development/compilers/ldc/default.nix
index 48301a8f2874..dc6a933a9345 100644
--- a/pkgs/development/compilers/ldc/default.nix
+++ b/pkgs/development/compilers/ldc/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchgit, fetchurl, cmake, llvm, curl, tzdata
+{ stdenv, fetchurl, cmake, llvm, curl, tzdata
 , python, libconfig, lit, gdb, unzip, darwin, bash
 , callPackage, makeWrapper, targetPackages
 , bootstrapVersion ? false
diff --git a/pkgs/development/compilers/llvm/3.4/llvm.nix b/pkgs/development/compilers/llvm/3.4/llvm.nix
index 0b29b04825a1..25bb08284142 100644
--- a/pkgs/development/compilers/llvm/3.4/llvm.nix
+++ b/pkgs/development/compilers/llvm/3.4/llvm.nix
@@ -8,7 +8,6 @@
 , libffi
 , libbfd
 , libxml2
-, valgrind
 , ncurses
 , version
 , zlib
diff --git a/pkgs/development/compilers/llvm/3.5/dragonegg.nix b/pkgs/development/compilers/llvm/3.5/dragonegg.nix
index 96d4f9f558c8..d54ffd96382d 100644
--- a/pkgs/development/compilers/llvm/3.5/dragonegg.nix
+++ b/pkgs/development/compilers/llvm/3.5/dragonegg.nix
@@ -1,4 +1,4 @@
-{stdenv, fetch, fetchpatch, llvm, gmp, mpfr, libmpc, ncurses, zlib, version}:
+{stdenv, fetch, llvm, gmp, mpfr, libmpc, ncurses, zlib, version}:
 
 stdenv.mkDerivation rec {
   name = "dragonegg-${version}";
diff --git a/pkgs/development/compilers/llvm/3.7/default.nix b/pkgs/development/compilers/llvm/3.7/default.nix
index 1bd4b88c72d4..f176894dedb9 100644
--- a/pkgs/development/compilers/llvm/3.7/default.nix
+++ b/pkgs/development/compilers/llvm/3.7/default.nix
@@ -1,5 +1,5 @@
-{ newScope, stdenv, libstdcxxHook, cmake, libxml2, python2, isl, fetchurl
-, overrideCC, wrapCCWith, darwin
+{ newScope, stdenv, libstdcxxHook, isl, fetchurl
+, overrideCC, wrapCCWith
 , buildLlvmTools # tools, but from the previous stage, for cross
 , targetLlvmLibraries # libraries, but from the next stage, for cross
 }:
diff --git a/pkgs/development/compilers/llvm/3.7/llvm.nix b/pkgs/development/compilers/llvm/3.7/llvm.nix
index 1654914ff8c4..98b6f4adbbf6 100644
--- a/pkgs/development/compilers/llvm/3.7/llvm.nix
+++ b/pkgs/development/compilers/llvm/3.7/llvm.nix
@@ -8,7 +8,6 @@
 , libffi
 , libbfd
 , libxml2
-, valgrind
 , ncurses
 , version
 , zlib
diff --git a/pkgs/development/compilers/llvm/3.8/default.nix b/pkgs/development/compilers/llvm/3.8/default.nix
index 28f908ee829f..99869e6e80a7 100644
--- a/pkgs/development/compilers/llvm/3.8/default.nix
+++ b/pkgs/development/compilers/llvm/3.8/default.nix
@@ -1,4 +1,4 @@
-{ newScope, stdenv, libstdcxxHook, isl, fetchurl, overrideCC, wrapCCWith, darwin
+{ newScope, stdenv, libstdcxxHook, isl, fetchurl, overrideCC, wrapCCWith
 , buildLlvmTools # tools, but from the previous stage, for cross
 , targetLlvmLibraries # libraries, but from the next stage, for cross
 }:
diff --git a/pkgs/development/compilers/llvm/3.8/llvm.nix b/pkgs/development/compilers/llvm/3.8/llvm.nix
index a6fb61198176..8cfcb1af43d4 100644
--- a/pkgs/development/compilers/llvm/3.8/llvm.nix
+++ b/pkgs/development/compilers/llvm/3.8/llvm.nix
@@ -8,7 +8,6 @@
 , libffi
 , libbfd
 , libxml2
-, valgrind
 , ncurses
 , version
 , zlib
diff --git a/pkgs/development/compilers/llvm/3.9/default.nix b/pkgs/development/compilers/llvm/3.9/default.nix
index ea3ea36eb6d3..01c08f4bd209 100644
--- a/pkgs/development/compilers/llvm/3.9/default.nix
+++ b/pkgs/development/compilers/llvm/3.9/default.nix
@@ -1,4 +1,4 @@
-{ newScope, stdenv, libstdcxxHook, isl, fetchurl, overrideCC, wrapCCWith, darwin
+{ newScope, stdenv, libstdcxxHook, isl, fetchurl, overrideCC, wrapCCWith
 , buildLlvmTools # tools, but from the previous stage, for cross
 , targetLlvmLibraries # libraries, but from the next stage, for cross
 }:
diff --git a/pkgs/development/compilers/llvm/3.9/llvm.nix b/pkgs/development/compilers/llvm/3.9/llvm.nix
index 458ad7db8efd..c974eb6f6d39 100644
--- a/pkgs/development/compilers/llvm/3.9/llvm.nix
+++ b/pkgs/development/compilers/llvm/3.9/llvm.nix
@@ -8,14 +8,12 @@
 , libffi
 , libbfd
 , libxml2
-, valgrind
 , ncurses
 , version
 , zlib
 , compiler-rt_src
 , debugVersion ? false
 , enableSharedLibraries ? (buildPlatform == hostPlatform)
-, darwin
 , buildPackages
 , buildPlatform
 , hostPlatform
diff --git a/pkgs/development/compilers/llvm/4/default.nix b/pkgs/development/compilers/llvm/4/default.nix
index ae674d1fa8e8..75037f6a07db 100644
--- a/pkgs/development/compilers/llvm/4/default.nix
+++ b/pkgs/development/compilers/llvm/4/default.nix
@@ -1,6 +1,5 @@
-{ lowPrio, newScope, stdenv, targetPlatform, cmake, libstdcxxHook
+{ lowPrio, newScope, stdenv, cmake, libstdcxxHook
 , libxml2, python2, isl, fetchurl, overrideCC, wrapCCWith
-, darwin
 , buildLlvmTools # tools, but from the previous stage, for cross
 , targetLlvmLibraries # libraries, but from the next stage, for cross
 }:
diff --git a/pkgs/development/compilers/llvm/4/libc++/default.nix b/pkgs/development/compilers/llvm/4/libc++/default.nix
index 6ce9c0d4792b..2b543b9d793a 100644
--- a/pkgs/development/compilers/llvm/4/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/4/libc++/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetch, cmake, python, llvm, libcxxabi, fixDarwinDylibNames, version }:
+{ lib, stdenv, fetch, cmake, python, libcxxabi, fixDarwinDylibNames, version }:
 
 stdenv.mkDerivation rec {
   name = "libc++-${version}";
diff --git a/pkgs/development/compilers/llvm/4/lld.nix b/pkgs/development/compilers/llvm/4/lld.nix
index 776109ee74d1..21b0c1c3601c 100644
--- a/pkgs/development/compilers/llvm/4/lld.nix
+++ b/pkgs/development/compilers/llvm/4/lld.nix
@@ -1,9 +1,7 @@
 { stdenv
 , fetch
 , cmake
-, zlib
 , llvm
-, python
 , version
 }:
 
diff --git a/pkgs/development/compilers/llvm/4/llvm.nix b/pkgs/development/compilers/llvm/4/llvm.nix
index e9140d3fcc6a..514c3a006e38 100644
--- a/pkgs/development/compilers/llvm/4/llvm.nix
+++ b/pkgs/development/compilers/llvm/4/llvm.nix
@@ -6,7 +6,6 @@
 , libffi
 , libbfd
 , libxml2
-, valgrind
 , ncurses
 , version
 , release_version
@@ -15,7 +14,6 @@
 , debugVersion ? false
 , enableManpages ? false
 , enableSharedLibraries ? true
-, darwin
 }:
 
 let
diff --git a/pkgs/development/compilers/llvm/4/openmp.nix b/pkgs/development/compilers/llvm/4/openmp.nix
index 0bdf5c71e1f3..a8a6b3dfea87 100644
--- a/pkgs/development/compilers/llvm/4/openmp.nix
+++ b/pkgs/development/compilers/llvm/4/openmp.nix
@@ -1,7 +1,6 @@
 { stdenv
 , fetch
 , cmake
-, zlib
 , llvm
 , perl
 , version
diff --git a/pkgs/development/compilers/llvm/5/clang/default.nix b/pkgs/development/compilers/llvm/5/clang/default.nix
index 07738048f8e2..5fd0271f0261 100644
--- a/pkgs/development/compilers/llvm/5/clang/default.nix
+++ b/pkgs/development/compilers/llvm/5/clang/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetch, cmake, libxml2, llvm, version, release_version, clang-tools-extra_src, python
+{ stdenv, fetch, cmake, libxml2, llvm, version, clang-tools-extra_src, python
 , fixDarwinDylibNames
 , enableManpages ? false
 }:
diff --git a/pkgs/development/compilers/llvm/5/default.nix b/pkgs/development/compilers/llvm/5/default.nix
index ef2e1c29088f..00b0083108b5 100644
--- a/pkgs/development/compilers/llvm/5/default.nix
+++ b/pkgs/development/compilers/llvm/5/default.nix
@@ -1,6 +1,5 @@
-{ lowPrio, newScope, stdenv, targetPlatform, cmake, libstdcxxHook
+{ lowPrio, newScope, stdenv, cmake, libstdcxxHook
 , libxml2, python2, isl, fetchurl, overrideCC, wrapCCWith
-, darwin
 , buildLlvmTools # tools, but from the previous stage, for cross
 , targetLlvmLibraries # libraries, but from the next stage, for cross
 }:
diff --git a/pkgs/development/compilers/llvm/5/libc++/default.nix b/pkgs/development/compilers/llvm/5/libc++/default.nix
index 5492e12da98c..c7b4615e374a 100644
--- a/pkgs/development/compilers/llvm/5/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/5/libc++/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetch, cmake, python, llvm, libcxxabi, fixDarwinDylibNames, version }:
+{ lib, stdenv, fetch, cmake, python, libcxxabi, fixDarwinDylibNames, version }:
 
 stdenv.mkDerivation rec {
   name = "libc++-${version}";
diff --git a/pkgs/development/compilers/llvm/5/lld.nix b/pkgs/development/compilers/llvm/5/lld.nix
index 05801f2f08f0..9a47435cf140 100644
--- a/pkgs/development/compilers/llvm/5/lld.nix
+++ b/pkgs/development/compilers/llvm/5/lld.nix
@@ -1,9 +1,7 @@
 { stdenv
 , fetch
 , cmake
-, zlib
 , llvm
-, python
 , version
 }:
 
diff --git a/pkgs/development/compilers/llvm/5/llvm.nix b/pkgs/development/compilers/llvm/5/llvm.nix
index 31750e2d0da8..68eebc33c6b9 100644
--- a/pkgs/development/compilers/llvm/5/llvm.nix
+++ b/pkgs/development/compilers/llvm/5/llvm.nix
@@ -1,12 +1,10 @@
 { stdenv
 , fetch
-, fetchpatch
 , cmake
 , python
 , libffi
 , libbfd
 , libxml2
-, valgrind
 , ncurses
 , version
 , release_version
@@ -15,7 +13,6 @@
 , debugVersion ? false
 , enableManpages ? false
 , enableSharedLibraries ? true
-, darwin
 }:
 
 let
diff --git a/pkgs/development/compilers/llvm/5/openmp.nix b/pkgs/development/compilers/llvm/5/openmp.nix
index 5c2b7501f979..901015bf2ff4 100644
--- a/pkgs/development/compilers/llvm/5/openmp.nix
+++ b/pkgs/development/compilers/llvm/5/openmp.nix
@@ -1,7 +1,6 @@
 { stdenv
 , fetch
 , cmake
-, zlib
 , llvm
 , perl
 , version
diff --git a/pkgs/development/compilers/llvm/6/clang/default.nix b/pkgs/development/compilers/llvm/6/clang/default.nix
index 882144184064..840567496785 100644
--- a/pkgs/development/compilers/llvm/6/clang/default.nix
+++ b/pkgs/development/compilers/llvm/6/clang/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetch, cmake, libxml2, llvm, version, release_version, clang-tools-extra_src, python
+{ stdenv, fetch, cmake, libxml2, llvm, version, clang-tools-extra_src, python
 , fixDarwinDylibNames
 , enableManpages ? false
 }:
diff --git a/pkgs/development/compilers/llvm/6/default.nix b/pkgs/development/compilers/llvm/6/default.nix
index 66f0facc952c..141daa88dcff 100644
--- a/pkgs/development/compilers/llvm/6/default.nix
+++ b/pkgs/development/compilers/llvm/6/default.nix
@@ -1,6 +1,5 @@
-{ lowPrio, newScope, stdenv, targetPlatform, cmake, libstdcxxHook
+{ lowPrio, newScope, stdenv, cmake, libstdcxxHook
 , libxml2, python2, isl, fetchurl, overrideCC, wrapCCWith
-, darwin
 , buildLlvmTools # tools, but from the previous stage, for cross
 , targetLlvmLibraries # libraries, but from the next stage, for cross
 }:
diff --git a/pkgs/development/compilers/llvm/6/libc++/default.nix b/pkgs/development/compilers/llvm/6/libc++/default.nix
index c1f0b9f61294..1f87cb83ab01 100644
--- a/pkgs/development/compilers/llvm/6/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/6/libc++/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetch, cmake, python, llvm, libcxxabi, fixDarwinDylibNames, version }:
+{ lib, stdenv, fetch, cmake, python, libcxxabi, fixDarwinDylibNames, version }:
 
 stdenv.mkDerivation rec {
   name = "libc++-${version}";
diff --git a/pkgs/development/compilers/llvm/6/lld.nix b/pkgs/development/compilers/llvm/6/lld.nix
index 818ad47a335a..1e68276945ec 100644
--- a/pkgs/development/compilers/llvm/6/lld.nix
+++ b/pkgs/development/compilers/llvm/6/lld.nix
@@ -3,7 +3,6 @@
 , cmake
 , libxml2
 , llvm
-, python
 , version
 }:
 
diff --git a/pkgs/development/compilers/llvm/6/llvm.nix b/pkgs/development/compilers/llvm/6/llvm.nix
index 6fc448574f43..a86f5b5039e7 100644
--- a/pkgs/development/compilers/llvm/6/llvm.nix
+++ b/pkgs/development/compilers/llvm/6/llvm.nix
@@ -1,12 +1,10 @@
 { stdenv
 , fetch
-, fetchpatch
 , cmake
 , python
 , libffi
 , libbfd
 , libxml2
-, valgrind
 , ncurses
 , version
 , release_version
@@ -15,7 +13,6 @@
 , enableManpages ? false
 , enableSharedLibraries ? true
 , enableWasm ? true
-, darwin
 }:
 
 let
diff --git a/pkgs/development/compilers/llvm/6/openmp.nix b/pkgs/development/compilers/llvm/6/openmp.nix
index 16093758e826..908a5f1218f7 100644
--- a/pkgs/development/compilers/llvm/6/openmp.nix
+++ b/pkgs/development/compilers/llvm/6/openmp.nix
@@ -1,7 +1,6 @@
 { stdenv
 , fetch
 , cmake
-, zlib
 , llvm
 , perl
 , version
diff --git a/pkgs/development/compilers/matter-compiler/default.nix b/pkgs/development/compilers/matter-compiler/default.nix
index 58fb0ca22d7c..63e5b50c3d47 100644
--- a/pkgs/development/compilers/matter-compiler/default.nix
+++ b/pkgs/development/compilers/matter-compiler/default.nix
@@ -1,5 +1,5 @@
 
-{ stdenv, lib, bundlerEnv, ruby }:
+{ lib, bundlerEnv, ruby }:
 
 bundlerEnv {
   name = "matter_compiler-0.5.1";
diff --git a/pkgs/development/compilers/mcpp/default.nix b/pkgs/development/compilers/mcpp/default.nix
index cdf201cec7ad..9ce7c9166bca 100644
--- a/pkgs/development/compilers/mcpp/default.nix
+++ b/pkgs/development/compilers/mcpp/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, mcpp }:
+{ stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
   name = "mcpp-2.7.2";
diff --git a/pkgs/development/compilers/mono/4.0.nix b/pkgs/development/compilers/mono/4.0.nix
index f13883db74ff..892ae99abaf5 100644
--- a/pkgs/development/compilers/mono/4.0.nix
+++ b/pkgs/development/compilers/mono/4.0.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, Foundation, libobjc }:
+{ callPackage, Foundation, libobjc }:
 callPackage ./generic.nix (rec {
   inherit Foundation libobjc;
   version = "4.0.4.1";
diff --git a/pkgs/development/compilers/mono/4.4.nix b/pkgs/development/compilers/mono/4.4.nix
index f80cffe220ea..9a3ccd1fd861 100644
--- a/pkgs/development/compilers/mono/4.4.nix
+++ b/pkgs/development/compilers/mono/4.4.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, Foundation, libobjc }:
+{ callPackage, Foundation, libobjc }:
 
 callPackage ./generic.nix (rec {
   inherit Foundation libobjc;
diff --git a/pkgs/development/compilers/mono/4.6.nix b/pkgs/development/compilers/mono/4.6.nix
index 7c9918cdd397..2bba660b69cd 100644
--- a/pkgs/development/compilers/mono/4.6.nix
+++ b/pkgs/development/compilers/mono/4.6.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, Foundation, libobjc }:
+{ callPackage, Foundation, libobjc }:
 
 callPackage ./generic.nix (rec {
   inherit Foundation libobjc;
diff --git a/pkgs/development/compilers/mono/4.8.nix b/pkgs/development/compilers/mono/4.8.nix
index c3ba316cd13b..f445127c0da8 100644
--- a/pkgs/development/compilers/mono/4.8.nix
+++ b/pkgs/development/compilers/mono/4.8.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, Foundation, libobjc }:
+{ callPackage, Foundation, libobjc }:
 
 callPackage ./generic-cmake.nix (rec {
   inherit Foundation libobjc;
diff --git a/pkgs/development/compilers/mono/5.0.nix b/pkgs/development/compilers/mono/5.0.nix
index d10d6e3e6053..53820c97b1b0 100644
--- a/pkgs/development/compilers/mono/5.0.nix
+++ b/pkgs/development/compilers/mono/5.0.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, Foundation, libobjc }:
+{ callPackage, Foundation, libobjc }:
 
 callPackage ./generic-cmake.nix (rec {
   inherit Foundation libobjc;
diff --git a/pkgs/development/compilers/mono/5.4.nix b/pkgs/development/compilers/mono/5.4.nix
index 31e86f94c0a2..acebb4beef6a 100644
--- a/pkgs/development/compilers/mono/5.4.nix
+++ b/pkgs/development/compilers/mono/5.4.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, Foundation, libobjc }:
+{ callPackage, Foundation, libobjc }:
 
 callPackage ./generic-cmake.nix (rec {
   inherit Foundation libobjc;
diff --git a/pkgs/development/compilers/mono/5.8.nix b/pkgs/development/compilers/mono/5.8.nix
index 6db9e19807bb..7b5008fd04c2 100644
--- a/pkgs/development/compilers/mono/5.8.nix
+++ b/pkgs/development/compilers/mono/5.8.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, Foundation, libobjc }:
+{ callPackage, Foundation, libobjc }:
 
 callPackage ./generic-cmake.nix (rec {
   inherit Foundation libobjc;
diff --git a/pkgs/development/compilers/nvidia-cg-toolkit/default.nix b/pkgs/development/compilers/nvidia-cg-toolkit/default.nix
index 9eec23f1ba88..21ccf77e4a24 100644
--- a/pkgs/development/compilers/nvidia-cg-toolkit/default.nix
+++ b/pkgs/development/compilers/nvidia-cg-toolkit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, patchelf }:
+{ lib, stdenv, fetchurl }:
 
 assert stdenv ? glibc;
 
diff --git a/pkgs/development/compilers/obliv-c/default.nix b/pkgs/development/compilers/obliv-c/default.nix
index 774cefb79404..f5bd3430ae70 100644
--- a/pkgs/development/compilers/obliv-c/default.nix
+++ b/pkgs/development/compilers/obliv-c/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, libgcrypt, fetchFromGitHub, ocamlPackages, perl }:
+{ stdenv, libgcrypt, fetchFromGitHub, ocamlPackages, perl }:
 stdenv.mkDerivation rec {
   name = "obliv-c-${version}";
   version = "0.0pre20170827";
diff --git a/pkgs/development/compilers/openjdk/10.nix b/pkgs/development/compilers/openjdk/10.nix
index 7ed493fe92e9..6e8d9003bf43 100644
--- a/pkgs/development/compilers/openjdk/10.nix
+++ b/pkgs/development/compilers/openjdk/10.nix
@@ -1,5 +1,5 @@
 { stdenv, lib, fetchurl, bash, cpio, pkgconfig, file, which, unzip, zip, cups, freetype
-, alsaLib, bootjdk, cacert, perl, liberation_ttf, fontconfig, zlib, lndir
+, alsaLib, bootjdk, perl, liberation_ttf, fontconfig, zlib, lndir
 , libX11, libICE, libXrender, libXext, libXt, libXtst, libXi, libXinerama, libXcursor, libXrandr
 , libjpeg, giflib
 , setJavaClassPath
diff --git a/pkgs/development/compilers/openjdk/bootstrap.nix b/pkgs/development/compilers/openjdk/bootstrap.nix
index 3c29df7ec78e..612f0db05821 100644
--- a/pkgs/development/compilers/openjdk/bootstrap.nix
+++ b/pkgs/development/compilers/openjdk/bootstrap.nix
@@ -1,5 +1,5 @@
 { stdenv
-, runCommand, fetchurl, file, zlib
+, runCommand, fetchurl, zlib
 
 , version
 }:
diff --git a/pkgs/development/compilers/oraclejdk/jdk10-linux.nix b/pkgs/development/compilers/oraclejdk/jdk10-linux.nix
index e6e868fdf41b..de063500b709 100644
--- a/pkgs/development/compilers/oraclejdk/jdk10-linux.nix
+++ b/pkgs/development/compilers/oraclejdk/jdk10-linux.nix
@@ -2,11 +2,9 @@
 , stdenv
 , requireFile
 , makeWrapper
-, unzip
 , file
 , xorg ? null
 , packageType ? "JDK" # JDK, JRE, or ServerJRE
-, pluginSupport ? true
 , glib
 , libxml2
 , ffmpeg_2
diff --git a/pkgs/development/compilers/pakcs/default.nix b/pkgs/development/compilers/pakcs/default.nix
index 94b89cf3a952..603882653480 100644
--- a/pkgs/development/compilers/pakcs/default.nix
+++ b/pkgs/development/compilers/pakcs/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
 
   curryBase = haskellPackages.callPackage (
     { mkDerivation, base, Cabal, containers, directory, either
-    , filepath, mtl, pretty, stdenv, syb, time
+    , filepath, mtl, pretty, syb, time
     }:
     mkDerivation {
       pname = "curry-base";
@@ -49,7 +49,7 @@ stdenv.mkDerivation rec {
 
   curryFront = haskellPackages.callPackage (
     { mkDerivation, base, Cabal, containers, directory
-    , filepath, mtl, network-uri, process, stdenv, syb, transformers
+    , filepath, mtl, network-uri, process, syb, transformers
     }:
     mkDerivation {
       pname = "curry-frontend";
diff --git a/pkgs/development/compilers/rust/binaryBuild.nix b/pkgs/development/compilers/rust/binaryBuild.nix
index 4c3c5d008f06..3cf6d4efe2d5 100644
--- a/pkgs/development/compilers/rust/binaryBuild.nix
+++ b/pkgs/development/compilers/rust/binaryBuild.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, makeWrapper, bash, cacert, zlib, buildRustPackage, curl, darwin
+{ stdenv, makeWrapper, bash, buildRustPackage, curl, darwin
 , version
 , src
 , platform
diff --git a/pkgs/development/compilers/rust/cargo.nix b/pkgs/development/compilers/rust/cargo.nix
index 46caabf33917..2ff3257c7fb7 100644
--- a/pkgs/development/compilers/rust/cargo.nix
+++ b/pkgs/development/compilers/rust/cargo.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, file, curl, pkgconfig, python, openssl, cmake, zlib
+{ stdenv, file, curl, pkgconfig, python, openssl, cmake, zlib
 , makeWrapper, libiconv, cacert, rustPlatform, rustc, libgit2, darwin
 , version
 , patches ? []
diff --git a/pkgs/development/compilers/souffle/default.nix b/pkgs/development/compilers/souffle/default.nix
index 099a591b407d..0523e099e497 100644
--- a/pkgs/development/compilers/souffle/default.nix
+++ b/pkgs/development/compilers/souffle/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchFromGitHub
 , boost, bison, flex, openjdk, doxygen
-, perl, graphviz, libtool, ncurses, zlib, sqlite
+, perl, graphviz, ncurses, zlib, sqlite
 , autoreconfHook }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/compilers/swift/default.nix b/pkgs/development/compilers/swift/default.nix
index abbfdd2abb72..9c1a36585907 100644
--- a/pkgs/development/compilers/swift/default.nix
+++ b/pkgs/development/compilers/swift/default.nix
@@ -27,7 +27,6 @@
 , git
 , libgit2
 , fetchFromGitHub
-, fetchpatch
 , paxctl
 , findutils
 , makeWrapper
diff --git a/pkgs/development/compilers/urweb/default.nix b/pkgs/development/compilers/urweb/default.nix
index f2b6016ceb70..8426635ce962 100644
--- a/pkgs/development/compilers/urweb/default.nix
+++ b/pkgs/development/compilers/urweb/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, file, openssl, mlton
+{ stdenv, fetchurl, file, openssl, mlton
 , mysql, postgresql, sqlite, gcc
 }:
 
diff --git a/pkgs/development/coq-modules/mathcomp/generic.nix b/pkgs/development/coq-modules/mathcomp/generic.nix
index 1cc5dc368da3..22721ca98bc2 100644
--- a/pkgs/development/coq-modules/mathcomp/generic.nix
+++ b/pkgs/development/coq-modules/mathcomp/generic.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, coq, ncurses, which
+{ stdenv, coq, ncurses, which
 , graphviz, withDoc ? false
 , src, name
 }:
diff --git a/pkgs/development/coq-modules/ssreflect/generic.nix b/pkgs/development/coq-modules/ssreflect/generic.nix
index a44e81d3c19c..d09e47a7f845 100644
--- a/pkgs/development/coq-modules/ssreflect/generic.nix
+++ b/pkgs/development/coq-modules/ssreflect/generic.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, coq, ncurses, which
+{ stdenv, coq, ncurses, which
 , graphviz, withDoc ? false
 , src, name, patches ? []
 }:
diff --git a/pkgs/development/idris-modules/build-builtin-package.nix b/pkgs/development/idris-modules/build-builtin-package.nix
index 1cd687058b3a..ff19e52135c8 100644
--- a/pkgs/development/idris-modules/build-builtin-package.nix
+++ b/pkgs/development/idris-modules/build-builtin-package.nix
@@ -1,7 +1,7 @@
 # Build one of the packages that comes with idris
 # name: The name of the package
 # deps: The dependencies of the package
-{ idris, build-idris-package, lib }: name: deps:
+{ idris, build-idris-package }: name: deps:
 let
   inherit (builtins.parseDrvName idris.name) version;
 in
diff --git a/pkgs/development/interpreters/erlang/R19.nix b/pkgs/development/interpreters/erlang/R19.nix
index d0ba1912e9a4..d94d4a5a14d0 100644
--- a/pkgs/development/interpreters/erlang/R19.nix
+++ b/pkgs/development/interpreters/erlang/R19.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, fetchurl, fetchpatch }:
+{ mkDerivation, fetchpatch }:
 
 mkDerivation rec {
   version = "19.3.6.6";
diff --git a/pkgs/development/interpreters/erlang/R20.nix b/pkgs/development/interpreters/erlang/R20.nix
index 5cea1fd533f2..19ac6d355926 100644
--- a/pkgs/development/interpreters/erlang/R20.nix
+++ b/pkgs/development/interpreters/erlang/R20.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, fetchurl }:
+{ mkDerivation }:
 
 mkDerivation rec {
   version = "20.3.8";
diff --git a/pkgs/development/interpreters/erlang/R21.nix b/pkgs/development/interpreters/erlang/R21.nix
index de00ebdf2cb0..e9aa2a3dc426 100644
--- a/pkgs/development/interpreters/erlang/R21.nix
+++ b/pkgs/development/interpreters/erlang/R21.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, fetchurl }:
+{ mkDerivation }:
 
 mkDerivation rec {
   version = "21.0";
diff --git a/pkgs/development/interpreters/erlang/generic-builder.nix b/pkgs/development/interpreters/erlang/generic-builder.nix
index 6ea3ac73a4b1..ba0a00b30376 100644
--- a/pkgs/development/interpreters/erlang/generic-builder.nix
+++ b/pkgs/development/interpreters/erlang/generic-builder.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv, fetchurl, fetchFromGitHub, makeWrapper, gawk, gnum4, gnused
+{ pkgs, stdenv, fetchFromGitHub, makeWrapper, gawk, gnum4, gnused
 , libxml2, libxslt, ncurses, openssl, perl, autoreconfHook
 , openjdk ? null # javacSupport
 , unixODBC ? null # odbcSupport
diff --git a/pkgs/development/interpreters/guile/2.0.nix b/pkgs/development/interpreters/guile/2.0.nix
index b0eeb89ce431..848b8666f27d 100644
--- a/pkgs/development/interpreters/guile/2.0.nix
+++ b/pkgs/development/interpreters/guile/2.0.nix
@@ -2,7 +2,7 @@
 , buildPlatform, hostPlatform
 , fetchpatch, fetchurl, makeWrapper, gawk, pkgconfig
 , libffi, libtool, readline, gmp, boehmgc, libunistring
-, coverageAnalysis ? null, gnu ? null
+, coverageAnalysis ? null
 }:
 
 # Do either a coverage analysis build or a standard build.
diff --git a/pkgs/development/interpreters/guile/default.nix b/pkgs/development/interpreters/guile/default.nix
index 196c899fcea9..8110598e1730 100644
--- a/pkgs/development/interpreters/guile/default.nix
+++ b/pkgs/development/interpreters/guile/default.nix
@@ -2,7 +2,7 @@
 , buildPlatform, hostPlatform
 , fetchurl, makeWrapper, gawk, pkgconfig
 , libffi, libtool, readline, gmp, boehmgc, libunistring
-, coverageAnalysis ? null, gnu ? null
+, coverageAnalysis ? null
 }:
 
 # Do either a coverage analysis build or a standard build.
diff --git a/pkgs/development/interpreters/lua-5/5.1.nix b/pkgs/development/interpreters/lua-5/5.1.nix
index 271490c99574..09af492490cf 100644
--- a/pkgs/development/interpreters/lua-5/5.1.nix
+++ b/pkgs/development/interpreters/lua-5/5.1.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, readline }:
+{ stdenv, fetchurl, readline }:
 
 let
   dsoPatch = fetchurl {
diff --git a/pkgs/development/interpreters/lua-5/5.2.nix b/pkgs/development/interpreters/lua-5/5.2.nix
index 6221bf3fb843..6d8de7bae27e 100644
--- a/pkgs/development/interpreters/lua-5/5.2.nix
+++ b/pkgs/development/interpreters/lua-5/5.2.nix
@@ -1,6 +1,4 @@
-{ stdenv, fetchurl, readline, compat ? false
-, hostPlatform
-}:
+{ stdenv, fetchurl, readline, compat ? false }:
 
 let
   dsoPatch = fetchurl {
diff --git a/pkgs/development/interpreters/lua-5/5.3.nix b/pkgs/development/interpreters/lua-5/5.3.nix
index 5a4893db0637..2c4f3657aac2 100644
--- a/pkgs/development/interpreters/lua-5/5.3.nix
+++ b/pkgs/development/interpreters/lua-5/5.3.nix
@@ -1,6 +1,4 @@
-{ stdenv, fetchurl, readline, compat ? false
-, hostPlatform
-}:
+{ stdenv, fetchurl, readline, compat ? false }:
 
 stdenv.mkDerivation rec {
   name = "lua-${version}";
diff --git a/pkgs/development/interpreters/luajit/default.nix b/pkgs/development/interpreters/luajit/default.nix
index 73b979e9ca4f..9ee628f498ee 100644
--- a/pkgs/development/interpreters/luajit/default.nix
+++ b/pkgs/development/interpreters/luajit/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, hostPlatform }:
+{ stdenv, lib, fetchurl }:
 rec {
 
   luajit = luajit_2_1;
diff --git a/pkgs/development/interpreters/perl/default.nix b/pkgs/development/interpreters/perl/default.nix
index 08672d28a1f8..40a70623dcb7 100644
--- a/pkgs/development/interpreters/perl/default.nix
+++ b/pkgs/development/interpreters/perl/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, fetchurlBoot, buildPackages
-, enableThreading ? stdenv ? glibc, fetchpatch, makeWrapper
+, enableThreading ? stdenv ? glibc, makeWrapper
 }:
 
 with lib;
diff --git a/pkgs/development/interpreters/php/default.nix b/pkgs/development/interpreters/php/default.nix
index 3032b5e4c2a1..52a3c64f81ca 100644
--- a/pkgs/development/interpreters/php/default.nix
+++ b/pkgs/development/interpreters/php/default.nix
@@ -1,6 +1,6 @@
 # pcre functionality is tested in nixos/tests/php-pcre.nix
 
-{ lib, stdenv, fetchurl, composableDerivation, autoconf, automake, flex, bison
+{ lib, stdenv, fetchurl, composableDerivation, flex, bison
 , mysql, libxml2, readline, zlib, curl, postgresql, gettext
 , openssl, pcre, pkgconfig, sqlite, config, libjpeg, libpng, freetype
 , libxslt, libmcrypt, bzip2, icu, openldap, cyrus_sasl, libmhash, freetds
diff --git a/pkgs/development/interpreters/pyrex/0.9.5.nix b/pkgs/development/interpreters/pyrex/0.9.5.nix
index 18bc875fb334..be11b38a0b83 100644
--- a/pkgs/development/interpreters/pyrex/0.9.5.nix
+++ b/pkgs/development/interpreters/pyrex/0.9.5.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, python2Packages }:
+{ fetchurl, python2Packages }:
 
 let version = "0.9.5.1.1"; in
 
diff --git a/pkgs/development/interpreters/pyrex/0.9.6.nix b/pkgs/development/interpreters/pyrex/0.9.6.nix
index 2feb15b647da..2a18dbff9e6e 100644
--- a/pkgs/development/interpreters/pyrex/0.9.6.nix
+++ b/pkgs/development/interpreters/pyrex/0.9.6.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, python2Packages }:
+{ fetchurl, python2Packages }:
 
 let version = "0.9.6.4"; in
 
diff --git a/pkgs/development/interpreters/python/cpython/2.7/default.nix b/pkgs/development/interpreters/python/cpython/2.7/default.nix
index d37f59250d55..fd84d924d7b8 100644
--- a/pkgs/development/interpreters/python/cpython/2.7/default.nix
+++ b/pkgs/development/interpreters/python/cpython/2.7/default.nix
@@ -10,7 +10,6 @@
 , zlib
 , callPackage
 , self
-, gettext
 , db
 , expat
 , libffi
@@ -19,7 +18,7 @@
 # Some proprietary libs assume UCS2 unicode, especially on darwin :(
 , ucsEncoding ? 4
 # For the Python package set
-, pkgs, packageOverrides ? (self: super: {})
+, packageOverrides ? (self: super: {})
 }:
 
 assert x11Support -> tcl != null
diff --git a/pkgs/development/interpreters/python/cpython/3.4/default.nix b/pkgs/development/interpreters/python/cpython/3.4/default.nix
index a8b6ffd1da91..7e583087c083 100644
--- a/pkgs/development/interpreters/python/cpython/3.4/default.nix
+++ b/pkgs/development/interpreters/python/cpython/3.4/default.nix
@@ -15,7 +15,7 @@
 , CF, configd
 , python-setup-hook
 # For the Python package set
-, pkgs, packageOverrides ? (self: super: {})
+, packageOverrides ? (self: super: {})
 }:
 
 assert x11Support -> tcl != null
diff --git a/pkgs/development/interpreters/python/cpython/3.5/default.nix b/pkgs/development/interpreters/python/cpython/3.5/default.nix
index 2bbdb8bdd840..588880c1e82e 100644
--- a/pkgs/development/interpreters/python/cpython/3.5/default.nix
+++ b/pkgs/development/interpreters/python/cpython/3.5/default.nix
@@ -15,7 +15,7 @@
 , CF, configd
 , python-setup-hook
 # For the Python package set
-, pkgs, packageOverrides ? (self: super: {})
+, packageOverrides ? (self: super: {})
 }:
 
 assert x11Support -> tcl != null
diff --git a/pkgs/development/interpreters/python/cpython/3.6/default.nix b/pkgs/development/interpreters/python/cpython/3.6/default.nix
index f8628186d799..6b9e26e99fcd 100644
--- a/pkgs/development/interpreters/python/cpython/3.6/default.nix
+++ b/pkgs/development/interpreters/python/cpython/3.6/default.nix
@@ -1,5 +1,4 @@
 { stdenv, fetchurl, fetchpatch, buildPackages
-, glibc
 , bzip2
 , expat
 , libffi
@@ -16,7 +15,7 @@
 , CF, configd
 , python-setup-hook
 # For the Python package set
-, pkgs, packageOverrides ? (self: super: {})
+, packageOverrides ? (self: super: {})
 }:
 
 assert x11Support -> tcl != null
diff --git a/pkgs/development/interpreters/python/cpython/3.7/default.nix b/pkgs/development/interpreters/python/cpython/3.7/default.nix
index e0cc198c096e..adee8d594f18 100644
--- a/pkgs/development/interpreters/python/cpython/3.7/default.nix
+++ b/pkgs/development/interpreters/python/cpython/3.7/default.nix
@@ -1,5 +1,4 @@
 { stdenv, fetchurl, fetchpatch
-, glibc
 , bzip2
 , expat
 , libffi
@@ -16,7 +15,7 @@
 , CF, configd
 , python-setup-hook
 # For the Python package set
-, pkgs, packageOverrides ? (self: super: {})
+, packageOverrides ? (self: super: {})
 }:
 
 assert x11Support -> tcl != null
diff --git a/pkgs/development/interpreters/python/pypy/2.7/default.nix b/pkgs/development/interpreters/python/pypy/2.7/default.nix
index e68cfc3148ff..95a893a209c1 100644
--- a/pkgs/development/interpreters/python/pypy/2.7/default.nix
+++ b/pkgs/development/interpreters/python/pypy/2.7/default.nix
@@ -4,7 +4,7 @@
 , makeWrapper, callPackage, self, gdbm, db
 , python-setup-hook
 # For the Python package set
-, pkgs, packageOverrides ? (self: super: {})
+, packageOverrides ? (self: super: {})
 }:
 
 assert zlibSupport -> zlib != null;
diff --git a/pkgs/development/interpreters/rebol/default.nix b/pkgs/development/interpreters/rebol/default.nix
index 8a13c4efce61..4d98f18eee4a 100644
--- a/pkgs/development/interpreters/rebol/default.nix
+++ b/pkgs/development/interpreters/rebol/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchurl, patchelf, glibc, libX11, libXt, perl }:
+{ stdenv, fetchFromGitHub, fetchurl, glibc, libX11, libXt, perl }:
 
 stdenv.mkDerivation rec {
   name = "rebol-nightly-${version}";
diff --git a/pkgs/development/interpreters/self/default.nix b/pkgs/development/interpreters/self/default.nix
index 31ef51802ed6..594bbc05b7ce 100644
--- a/pkgs/development/interpreters/self/default.nix
+++ b/pkgs/development/interpreters/self/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, fetchgit, stdenv, xorg, makeWrapper, ncurses, cmake }:
+{ fetchgit, stdenv, xorg, makeWrapper, ncurses, cmake }:
 
 stdenv.mkDerivation rec {
   # The Self wrapper stores source in $XDG_DATA_HOME/self or ~/.local/share/self 
diff --git a/pkgs/development/interpreters/tcl/generic.nix b/pkgs/development/interpreters/tcl/generic.nix
index 3bf4ba2dc2f0..a472ccaafbf2 100644
--- a/pkgs/development/interpreters/tcl/generic.nix
+++ b/pkgs/development/interpreters/tcl/generic.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl
+{ stdenv
 
 # Version specific stuff
 , release, version, src
diff --git a/pkgs/development/interpreters/unicon-lang/default.nix b/pkgs/development/interpreters/unicon-lang/default.nix
index a6dfec49b2a2..77154b54fd8f 100644
--- a/pkgs/development/interpreters/unicon-lang/default.nix
+++ b/pkgs/development/interpreters/unicon-lang/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, unzip, gdbm, libX11, libXt }:
+{ stdenv, fetchurl, unzip, libX11, libXt }:
 
 stdenv.mkDerivation rec {
   name = "unicon-lang-${version}";
diff --git a/pkgs/development/java-modules/jogl/default.nix b/pkgs/development/java-modules/jogl/default.nix
index cceec44e6ae6..a3c3b2bf96f6 100644
--- a/pkgs/development/java-modules/jogl/default.nix
+++ b/pkgs/development/java-modules/jogl/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchgit, makeWrapper, ant, jdk, openjdk8, zulu8, git, xorg, udev, libGL, libGLU }:
+{ stdenv, fetchgit, ant, jdk, openjdk8, zulu8, git, xorg, udev, libGL, libGLU }:
 
 let
   # workaround https://github.com/NixOS/nixpkgs/issues/37364
diff --git a/pkgs/development/java-modules/maven-minimal.nix b/pkgs/development/java-modules/maven-minimal.nix
index df87f51768df..ca7cc7027be7 100644
--- a/pkgs/development/java-modules/maven-minimal.nix
+++ b/pkgs/development/java-modules/maven-minimal.nix
@@ -6,7 +6,7 @@ with pkgs.javaPackages;
 let
   collections = import ./collections.nix { inherit pkgs; };
   fetchMaven = pkgs.callPackage ./m2install.nix { };
-  plugins = import ./mavenPlugins.nix { inherit stdenv pkgs maven; };
+  plugins = import ./mavenPlugins.nix { inherit pkgs; };
   poms = import ./poms.nix { inherit fetchMaven; };
 in rec {
   # Maven needs all of these to function
diff --git a/pkgs/development/java-modules/mavenPlugins.nix b/pkgs/development/java-modules/mavenPlugins.nix
index e9ce5b1ce8cf..8cc79dc1d228 100644
--- a/pkgs/development/java-modules/mavenPlugins.nix
+++ b/pkgs/development/java-modules/mavenPlugins.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv, maven }:
+{ pkgs }:
 
 with pkgs;
 with pkgs.javaPackages;
diff --git a/pkgs/development/libraries/arguments/default.nix b/pkgs/development/libraries/arguments/default.nix
index 912ea53c3d3a..60fafd60ad0b 100644
--- a/pkgs/development/libraries/arguments/default.nix
+++ b/pkgs/development/libraries/arguments/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, cmake, libminc, bicpl }:
+{ stdenv, fetchFromGitHub, cmake }:
 
 stdenv.mkDerivation rec {
   pname = "arguments";
diff --git a/pkgs/development/libraries/assimp/default.nix b/pkgs/development/libraries/assimp/default.nix
index 219c8df803b7..24e06b0d65a9 100644
--- a/pkgs/development/libraries/assimp/default.nix
+++ b/pkgs/development/libraries/assimp/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, unzip, cmake, boost, zlib }:
+{ stdenv, fetchFromGitHub, cmake, boost, zlib }:
 
 stdenv.mkDerivation rec {
   name = "assimp-${version}";
diff --git a/pkgs/development/libraries/audio/libbass/default.nix b/pkgs/development/libraries/audio/libbass/default.nix
index 703679ba3a55..ec93e2f64671 100644
--- a/pkgs/development/libraries/audio/libbass/default.nix
+++ b/pkgs/development/libraries/audio/libbass/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, unzip, fetchurl, writeText }:
+{ stdenv, unzip, fetchurl }:
 
 let
   version = "24";
diff --git a/pkgs/development/libraries/avro-c/default.nix b/pkgs/development/libraries/avro-c/default.nix
index 8b787855c4de..580cd1bd73f5 100644
--- a/pkgs/development/libraries/avro-c/default.nix
+++ b/pkgs/development/libraries/avro-c/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, bash, cmake, fetchurl, pkgconfig, jansson, zlib }:
+{ stdenv, cmake, fetchurl, pkgconfig, jansson, zlib }:
 
 let
   version = "1.8.2";
diff --git a/pkgs/development/libraries/belcard/default.nix b/pkgs/development/libraries/belcard/default.nix
index 8805dc74a26c..093bb811489f 100644
--- a/pkgs/development/libraries/belcard/default.nix
+++ b/pkgs/development/libraries/belcard/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, cmake, fetchFromGitHub, bctoolbox, belr }:
+{ stdenv, cmake, fetchFromGitHub, bctoolbox, belr }:
 
 stdenv.mkDerivation rec {
   baseName = "belcard";
diff --git a/pkgs/development/libraries/belle-sip/default.nix b/pkgs/development/libraries/belle-sip/default.nix
index 003fce0ea8c3..09ca4908d789 100644
--- a/pkgs/development/libraries/belle-sip/default.nix
+++ b/pkgs/development/libraries/belle-sip/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, antlr3_4, libantlr3c, jre, polarssl, fetchFromGitHub
+{ stdenv, antlr3_4, libantlr3c, jre, polarssl, fetchFromGitHub
   , cmake, zlib, bctoolbox
 }:
 
diff --git a/pkgs/development/libraries/belr/default.nix b/pkgs/development/libraries/belr/default.nix
index 214abb21f2cd..736c9a2f9e0c 100644
--- a/pkgs/development/libraries/belr/default.nix
+++ b/pkgs/development/libraries/belr/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, cmake, fetchFromGitHub, bctoolbox }:
+{ stdenv, cmake, fetchFromGitHub, bctoolbox }:
 
 stdenv.mkDerivation rec {
   baseName = "belr";
diff --git a/pkgs/development/libraries/bzrtp/default.nix b/pkgs/development/libraries/bzrtp/default.nix
index cdc660ca3f32..11b94a0181a1 100644
--- a/pkgs/development/libraries/bzrtp/default.nix
+++ b/pkgs/development/libraries/bzrtp/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, cmake, fetchFromGitHub, bctoolbox, sqlite }:
+{ stdenv, cmake, fetchFromGitHub, bctoolbox, sqlite }:
 
 stdenv.mkDerivation rec {
   baseName = "bzrtp";
diff --git a/pkgs/development/libraries/caf/default.nix b/pkgs/development/libraries/caf/default.nix
index 1e764aff4cc1..397e80961e06 100644
--- a/pkgs/development/libraries/caf/default.nix
+++ b/pkgs/development/libraries/caf/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, cmake }:
+{ stdenv, fetchFromGitHub, cmake }:
 
 stdenv.mkDerivation rec {
   name = "actor-framework-${version}";
diff --git a/pkgs/development/libraries/cairo/default.nix b/pkgs/development/libraries/cairo/default.nix
index 4486149cfcef..db46412ceb55 100644
--- a/pkgs/development/libraries/cairo/default.nix
+++ b/pkgs/development/libraries/cairo/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub, fetchpatch, pkgconfig, libiconv
+{ stdenv, fetchurl, pkgconfig, libiconv
 , libintl, expat, zlib, libpng, pixman, fontconfig, freetype, xorg
 , gobjectSupport ? true, glib
 , xcbSupport ? true # no longer experimental since 1.12
diff --git a/pkgs/development/libraries/cairomm/default.nix b/pkgs/development/libraries/cairomm/default.nix
index 47250f2b3da2..a4e4968f562f 100644
--- a/pkgs/development/libraries/cairomm/default.nix
+++ b/pkgs/development/libraries/cairomm/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, pkgconfig, darwin, cairo, xlibsWrapper, fontconfig, freetype, libsigcxx }:
+{ fetchurl, stdenv, pkgconfig, darwin, cairo, fontconfig, freetype, libsigcxx }:
 let
   ver_maj = "1.12";
   ver_min = "2";
diff --git a/pkgs/development/libraries/capstone/default.nix b/pkgs/development/libraries/capstone/default.nix
index 64e3690eb3e6..0fc0dfb07066 100644
--- a/pkgs/development/libraries/capstone/default.nix
+++ b/pkgs/development/libraries/capstone/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, bash, pkgconfig }:
+{ stdenv, fetchurl, pkgconfig }:
 
 stdenv.mkDerivation rec {
   name    = "capstone-${version}";
diff --git a/pkgs/development/libraries/cl/default.nix b/pkgs/development/libraries/cl/default.nix
index 7c44c2e0ab0c..7cb75d8de0f3 100644
--- a/pkgs/development/libraries/cl/default.nix
+++ b/pkgs/development/libraries/cl/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchFromGitHub, SDL, libGLU_combined, rebar, erlang, opencl-headers, ocl-icd }:
+{stdenv, fetchFromGitHub, rebar, erlang, opencl-headers, ocl-icd }:
 
 stdenv.mkDerivation rec {
   version = "1.2.3";
diff --git a/pkgs/development/libraries/clutter/default.nix b/pkgs/development/libraries/clutter/default.nix
index eba94288e8fe..705aa7252d1f 100644
--- a/pkgs/development/libraries/clutter/default.nix
+++ b/pkgs/development/libraries/clutter/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, glib, pkgconfig, libGLU_combined, libX11, libXext, libXfixes
+{ stdenv, fetchurl, pkgconfig, libGLU_combined, libX11, libXext, libXfixes
 , libXdamage, libXcomposite, libXi, libxcb, cogl, pango, atk, json-glib,
 gobjectIntrospection, gtk3, gnome3
 }:
diff --git a/pkgs/development/libraries/crypto++/default.nix b/pkgs/development/libraries/crypto++/default.nix
index c1bf789c59bd..ba5b2aa43718 100644
--- a/pkgs/development/libraries/crypto++/default.nix
+++ b/pkgs/development/libraries/crypto++/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, fetchFromGitHub, stdenv }:
+{ fetchFromGitHub, stdenv }:
 
 stdenv.mkDerivation rec {
   name = "crypto++-${version}";
diff --git a/pkgs/development/libraries/db/generic.nix b/pkgs/development/libraries/db/generic.nix
index fb1292181756..c3ca9aa442bd 100644
--- a/pkgs/development/libraries/db/generic.nix
+++ b/pkgs/development/libraries/db/generic.nix
@@ -5,7 +5,7 @@
 
 # Options from inherited versions
 , version, sha256
-, patchSrc ? "src", extraPatches ? [ ]
+, extraPatches ? [ ]
 , license ? stdenv.lib.licenses.sleepycat
 , drvArgs ? {}
 }:
diff --git a/pkgs/development/libraries/dbus-sharp/dbus-sharp-1.0.nix b/pkgs/development/libraries/dbus-sharp/dbus-sharp-1.0.nix
index c17a140b9c57..013913e52972 100644
--- a/pkgs/development/libraries/dbus-sharp/dbus-sharp-1.0.nix
+++ b/pkgs/development/libraries/dbus-sharp/dbus-sharp-1.0.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchFromGitHub, pkgconfig, dbus, mono, autoreconfHook }:
+{stdenv, fetchFromGitHub, pkgconfig, mono, autoreconfHook }:
 
 stdenv.mkDerivation rec {
   name = "dbus-sharp-${version}";
diff --git a/pkgs/development/libraries/dbus-sharp/default.nix b/pkgs/development/libraries/dbus-sharp/default.nix
index ea7d920dc828..40c633dda523 100644
--- a/pkgs/development/libraries/dbus-sharp/default.nix
+++ b/pkgs/development/libraries/dbus-sharp/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchFromGitHub, pkgconfig, dbus, mono, autoreconfHook }:
+{stdenv, fetchFromGitHub, pkgconfig, mono, autoreconfHook }:
 
 stdenv.mkDerivation rec {
   name = "dbus-sharp-${version}";
diff --git a/pkgs/development/libraries/eclib/default.nix b/pkgs/development/libraries/eclib/default.nix
index e4d1fa2073fa..62014489f30c 100644
--- a/pkgs/development/libraries/eclib/default.nix
+++ b/pkgs/development/libraries/eclib/default.nix
@@ -2,8 +2,6 @@
 , fetchFromGitHub
 , fetchpatch
 , autoreconfHook
-, libtool
-, gettext
 , pari
 , ntl
 , gmp
diff --git a/pkgs/development/libraries/expat/default.nix b/pkgs/development/libraries/expat/default.nix
index e341ce842eb6..79b29a90463e 100644
--- a/pkgs/development/libraries/expat/default.nix
+++ b/pkgs/development/libraries/expat/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchpatch, fetchurl }:
+{ stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
   name = "expat-2.2.5";
diff --git a/pkgs/development/libraries/faac/default.nix b/pkgs/development/libraries/faac/default.nix
index 516968861482..04d085bde73c 100644
--- a/pkgs/development/libraries/faac/default.nix
+++ b/pkgs/development/libraries/faac/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, autoreconfHook
+{ stdenv, fetchurl, autoreconfHook
 , mp4v2Support ? true, mp4v2 ? null
 , drmSupport ? false # Digital Radio Mondiale
 }:
diff --git a/pkgs/development/libraries/ffmpeg-full/default.nix b/pkgs/development/libraries/ffmpeg-full/default.nix
index c5ce5e252fac..34c649022cf5 100644
--- a/pkgs/development/libraries/ffmpeg-full/default.nix
+++ b/pkgs/development/libraries/ffmpeg-full/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, pkgconfig, perl, texinfo, yasm
+{ stdenv, fetchurl, pkgconfig, perl, texinfo, yasm
 , hostPlatform
 /*
  *  Licensing options (yes some are listed twice, filters and such are not listed)
@@ -80,7 +80,6 @@
 #, libnut ? null # NUT (de)muxer, native (de)muser exists
 , libogg ? null # Ogg container used by vorbis & theora
 , libopus ? null # Opus de/encoder
-, libsndio ? null # sndio playback/record support
 , libssh ? null # SFTP protocol
 , libtheora ? null # Theora encoder
 , libv4l ? null # Video 4 Linux support
diff --git a/pkgs/development/libraries/ffmpeg-sixel/default.nix b/pkgs/development/libraries/ffmpeg-sixel/default.nix
index a3ce9ea9c2bf..4607d3e2f197 100644
--- a/pkgs/development/libraries/ffmpeg-sixel/default.nix
+++ b/pkgs/development/libraries/ffmpeg-sixel/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, pkgconfig, perl, libsixel, yasm
+{ stdenv, fetchFromGitHub, pkgconfig, libsixel, yasm
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/ffmpegthumbnailer/default.nix b/pkgs/development/libraries/ffmpegthumbnailer/default.nix
index 9e76c1e64001..a1cc11fb8c1e 100644
--- a/pkgs/development/libraries/ffmpegthumbnailer/default.nix
+++ b/pkgs/development/libraries/ffmpegthumbnailer/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, fetchFromGitHub, stdenv, ffmpeg, cmake, libpng, pkgconfig, libjpeg
+{ fetchFromGitHub, stdenv, ffmpeg, cmake, libpng, pkgconfig, libjpeg
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/folly/default.nix b/pkgs/development/libraries/folly/default.nix
index ccf2d6d05855..2b6a949c2326 100644
--- a/pkgs/development/libraries/folly/default.nix
+++ b/pkgs/development/libraries/folly/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, autoreconfHook, pkgconfig, boost, libevent
+{ stdenv, fetchFromGitHub, autoreconfHook, pkgconfig, boost, libevent
 , double-conversion, glog, google-gflags, python, libiberty, openssl }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/fontconfig/default.nix b/pkgs/development/libraries/fontconfig/default.nix
index c2d99446d81b..01c4140f3b5c 100644
--- a/pkgs/development/libraries/fontconfig/default.nix
+++ b/pkgs/development/libraries/fontconfig/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, substituteAll, fetchurl, fetchpatch
+{ stdenv, substituteAll, fetchurl
 , pkgconfig, freetype, expat, libxslt, gperf, dejavu_fonts
 , hostPlatform
 }:
diff --git a/pkgs/development/libraries/fontconfig/make-fonts-cache.nix b/pkgs/development/libraries/fontconfig/make-fonts-cache.nix
index 8b534edd2498..76e89b97617e 100644
--- a/pkgs/development/libraries/fontconfig/make-fonts-cache.nix
+++ b/pkgs/development/libraries/fontconfig/make-fonts-cache.nix
@@ -1,4 +1,4 @@
-{ runCommand, lib, writeText, fontconfig, fontDirectories }:
+{ runCommand, lib, fontconfig, fontDirectories }:
 
 runCommand "fc-cache"
   rec {
diff --git a/pkgs/development/libraries/frame/default.nix b/pkgs/development/libraries/frame/default.nix
index 2f5374851d82..e15626a160e2 100644
--- a/pkgs/development/libraries/frame/default.nix
+++ b/pkgs/development/libraries/frame/default.nix
@@ -1,5 +1,5 @@
 { enableX11 ? true
-,  stdenv, fetchurl, pkgconfig, xorg, xorgserver, xinput }:
+,  stdenv, fetchurl, pkgconfig, xorg }:
 
 stdenv.mkDerivation rec {
   name = "frame-${version}";
diff --git a/pkgs/development/libraries/freetype/default.nix b/pkgs/development/libraries/freetype/default.nix
index 23aa86af377c..c678b46c0d21 100644
--- a/pkgs/development/libraries/freetype/default.nix
+++ b/pkgs/development/libraries/freetype/default.nix
@@ -1,5 +1,4 @@
-{ stdenv, lib, fetchurl, copyPathsToStore
-, hostPlatform
+{ stdenv, fetchurl
 , pkgconfig, which, makeWrapper
 , zlib, bzip2, libpng, gnumake, glib
 
diff --git a/pkgs/development/libraries/gbenchmark/default.nix b/pkgs/development/libraries/gbenchmark/default.nix
index 6745bc1ecf5f..d700c3d3c160 100644
--- a/pkgs/development/libraries/gbenchmark/default.nix
+++ b/pkgs/development/libraries/gbenchmark/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchFromGitHub, cmake }:
+{ stdenv, fetchFromGitHub, cmake }:
 
 stdenv.mkDerivation rec {
   name = "gbenchmark-${version}";
diff --git a/pkgs/development/libraries/gegl/default.nix b/pkgs/development/libraries/gegl/default.nix
index d2987be6a3d5..ccfa7e536111 100644
--- a/pkgs/development/libraries/gegl/default.nix
+++ b/pkgs/development/libraries/gegl/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, glib, babl, libpng, cairo, libjpeg
+{ stdenv, fetchurl, pkgconfig, babl, libpng, cairo, libjpeg
 , librsvg, pango, gtk2, bzip2, intltool, libintl
 , OpenGL ? null }:
 
diff --git a/pkgs/development/libraries/geos/default.nix b/pkgs/development/libraries/geos/default.nix
index b92f6e61f56a..83030a7a0142 100644
--- a/pkgs/development/libraries/geos/default.nix
+++ b/pkgs/development/libraries/geos/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, python }:
+{ stdenv, fetchurl, python }:
 
 stdenv.mkDerivation rec {
   name = "geos-3.6.2";
diff --git a/pkgs/development/libraries/glib/default.nix b/pkgs/development/libraries/glib/default.nix
index fd6e0a65abce..8a07a9f9f227 100644
--- a/pkgs/development/libraries/glib/default.nix
+++ b/pkgs/development/libraries/glib/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, hostPlatform, fetchurl, gettext, pkgconfig, perl, python
+{ stdenv, fetchurl, gettext, pkgconfig, perl, python
 , libiconv, zlib, libffi, pcre, libelf, gnome3
 # use utillinuxMinimal to avoid circular dependency (utillinux, systemd, glib)
 , utillinuxMinimal ? null
diff --git a/pkgs/development/libraries/glibc/common.nix b/pkgs/development/libraries/glibc/common.nix
index 5c504d0d8e25..8b4a213aae05 100644
--- a/pkgs/development/libraries/glibc/common.nix
+++ b/pkgs/development/libraries/glibc/common.nix
@@ -20,7 +20,7 @@
 { stdenv, lib
 , buildPlatform, hostPlatform
 , buildPackages
-, fetchurl, fetchpatch ? null
+, fetchurl ? null
 , linuxHeaders ? null
 , gd ? null, libpng ? null
 , bison
diff --git a/pkgs/development/libraries/gnutls-kdh/generic.nix b/pkgs/development/libraries/gnutls-kdh/generic.nix
index 472ec83fb02c..a81cd91fdc76 100644
--- a/pkgs/development/libraries/gnutls-kdh/generic.nix
+++ b/pkgs/development/libraries/gnutls-kdh/generic.nix
@@ -1,6 +1,6 @@
-{ lib, fetchurl, stdenv, zlib, lzo, libtasn1, nettle, pkgconfig, lzip
+{ lib, stdenv, zlib, lzo, libtasn1, nettle, pkgconfig, lzip
 , guileBindings, guile, perl, gmp, autogen, libidn, p11-kit, unbound, libiconv
-, tpmSupport ? true, trousers, nettools, bash, gperftools, gperf, gettext, automake
+, tpmSupport ? true, trousers, nettools, gperftools, gperf, gettext, automake
 , yacc, texinfo
 
 # Version dependent args
diff --git a/pkgs/development/libraries/gnutls/generic.nix b/pkgs/development/libraries/gnutls/generic.nix
index 984603827c8d..081d896a6e0b 100644
--- a/pkgs/development/libraries/gnutls/generic.nix
+++ b/pkgs/development/libraries/gnutls/generic.nix
@@ -1,4 +1,4 @@
-{ lib, fetchurl, stdenv, zlib, lzo, libtasn1, nettle, pkgconfig, lzip
+{ lib, stdenv, zlib, lzo, libtasn1, nettle, pkgconfig, lzip
 , guileBindings, guile, perl, gmp, autogen, libidn, p11-kit, libiconv
 , tpmSupport ? false, trousers, which, nettools, libunistring
 , unbound, dns-root-data, gettext
diff --git a/pkgs/development/libraries/goffice/default.nix b/pkgs/development/libraries/goffice/default.nix
index 6cdd19f307df..6155b8b18bd0 100644
--- a/pkgs/development/libraries/goffice/default.nix
+++ b/pkgs/development/libraries/goffice/default.nix
@@ -1,5 +1,5 @@
 { fetchurl, stdenv, pkgconfig, intltool, glib, gtk3
-, libgsf, libxml2, libxslt, cairo, pango, librsvg, libspectre }:
+, libgsf, libxml2, libxslt, cairo, pango, librsvg }:
 
 stdenv.mkDerivation rec {
   name = "goffice-0.10.39";
diff --git a/pkgs/development/libraries/gpgme/default.nix b/pkgs/development/libraries/gpgme/default.nix
index 94c09b716832..e7da60a9d1a2 100644
--- a/pkgs/development/libraries/gpgme/default.nix
+++ b/pkgs/development/libraries/gpgme/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, libgpgerror, gnupg, pkgconfig, glib, pth, libassuan
+{ stdenv, fetchurl, libgpgerror, gnupg, pkgconfig, glib, pth, libassuan
 , file, which
 , autoreconfHook
 , git
diff --git a/pkgs/development/libraries/gsasl/default.nix b/pkgs/development/libraries/gsasl/default.nix
index 720ff06ceaa5..9c19bdbdc29a 100644
--- a/pkgs/development/libraries/gsasl/default.nix
+++ b/pkgs/development/libraries/gsasl/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, gss, libidn, kerberos }:
+{ fetchurl, stdenv, libidn, kerberos }:
 
 stdenv.mkDerivation rec {
   name = "gsasl-1.8.0";
diff --git a/pkgs/development/libraries/gsl/default.nix b/pkgs/development/libraries/gsl/default.nix
index 4f952359f711..37d4843db8d4 100644
--- a/pkgs/development/libraries/gsl/default.nix
+++ b/pkgs/development/libraries/gsl/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, fetchpatch, stdenv }:
+{ fetchurl, stdenv }:
 
 stdenv.mkDerivation rec {
   name = "gsl-2.5";
diff --git a/pkgs/development/libraries/gstreamer/base/default.nix b/pkgs/development/libraries/gstreamer/base/default.nix
index dfd3383cdbad..49216b70fe12 100644
--- a/pkgs/development/libraries/gstreamer/base/default.nix
+++ b/pkgs/development/libraries/gstreamer/base/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, fetchpatch, lib
 , pkgconfig, meson, ninja, gettext, gobjectIntrospection
-, python, gstreamer, orc, pango, libtheora, libvisual
+, python, gstreamer, orc, pango, libtheora
 , libintl, libopus
 , enableX11 ? stdenv.isLinux, libXv
 , enableWayland ? stdenv.isLinux, wayland
diff --git a/pkgs/development/libraries/gstreamer/legacy/gst-plugins-base/default.nix b/pkgs/development/libraries/gstreamer/legacy/gst-plugins-base/default.nix
index 8371b2780409..db75705c825a 100644
--- a/pkgs/development/libraries/gstreamer/legacy/gst-plugins-base/default.nix
+++ b/pkgs/development/libraries/gstreamer/legacy/gst-plugins-base/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, pkgconfig, python, gstreamer, xorg, alsaLib, cdparanoia
+{ fetchurl, stdenv, pkgconfig, gstreamer, xorg, alsaLib, cdparanoia
 , libogg, libtheora, libvorbis, freetype, pango, liboil, glib, cairo, orc
 , libintl
 , ApplicationServices
diff --git a/pkgs/development/libraries/gstreamer/legacy/gst-plugins-good/default.nix b/pkgs/development/libraries/gstreamer/legacy/gst-plugins-good/default.nix
index 75583624f545..9c47ef0260b4 100644
--- a/pkgs/development/libraries/gstreamer/legacy/gst-plugins-good/default.nix
+++ b/pkgs/development/libraries/gstreamer/legacy/gst-plugins-good/default.nix
@@ -1,6 +1,6 @@
 { fetchurl, stdenv, lib, pkgconfig, gst-plugins-base, aalib, cairo
-, flac, libjpeg, zlib, speex, libpng, libdv, libcaca, libvpx
-, libiec61883, libavc1394, taglib, libpulseaudio, gdk_pixbuf, orc
+, flac, libjpeg, speex, libpng, libdv, libcaca, libvpx
+, taglib, libpulseaudio, gdk_pixbuf, orc
 , glib, gstreamer, bzip2, libsoup, libshout, ncurses, libintl
 , # Whether to build no plugins that have external dependencies
   # (except the PulseAudio plugin).
diff --git a/pkgs/development/libraries/gstreamer/legacy/gst-plugins-ugly/default.nix b/pkgs/development/libraries/gstreamer/legacy/gst-plugins-ugly/default.nix
index ac680f8432ab..2f46016adac8 100644
--- a/pkgs/development/libraries/gstreamer/legacy/gst-plugins-ugly/default.nix
+++ b/pkgs/development/libraries/gstreamer/legacy/gst-plugins-ugly/default.nix
@@ -1,5 +1,5 @@
 { fetchurl, stdenv, pkgconfig, glib, gstreamer, gst-plugins-base
-, libmad, libdvdread, libmpeg2, libcdio, a52dec, x264, orc, lame, libintl }:
+, libmad, libdvdread, a52dec, x264, orc, lame, libintl }:
 
 stdenv.mkDerivation rec {
   name = "gst-plugins-ugly-0.10.19";
diff --git a/pkgs/development/libraries/gstreamer/vaapi/default.nix b/pkgs/development/libraries/gstreamer/vaapi/default.nix
index 11b451e76fdf..7255894f3b1f 100644
--- a/pkgs/development/libraries/gstreamer/vaapi/default.nix
+++ b/pkgs/development/libraries/gstreamer/vaapi/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, meson, ninja, pkgconfig, gst-plugins-base, bzip2, libva, wayland
-, libdrm, udev, xorg, libGLU_combined, yasm, gstreamer, gst-plugins-bad, nasm
+, libdrm, udev, xorg, libGLU_combined, gstreamer, gst-plugins-bad, nasm
 , libvpx, python
 }:
 
diff --git a/pkgs/development/libraries/gtkd/default.nix b/pkgs/development/libraries/gtkd/default.nix
index f206a169b93d..c0dc0753cd01 100644
--- a/pkgs/development/libraries/gtkd/default.nix
+++ b/pkgs/development/libraries/gtkd/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchzip, atk, cairo, dmd, gdk_pixbuf, gnome3, gst_all_1, librsvg
-, pango, pkgconfig, substituteAll, which }:
+, pango, pkgconfig, which }:
 
 stdenv.mkDerivation rec {
   name = "gtkd-${version}";
diff --git a/pkgs/development/libraries/gvfs/default.nix b/pkgs/development/libraries/gvfs/default.nix
index 4f3bc64b5d40..4c858242bb54 100644
--- a/pkgs/development/libraries/gvfs/default.nix
+++ b/pkgs/development/libraries/gvfs/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, meson, ninja, fetchurl, pkgconfig, gettext, gnome3
+{ stdenv, fetchurl, pkgconfig, gettext, gnome3
 , glib, libgudev, udisks2, libgcrypt, libcap, polkit
 , libgphoto2, avahi, libarchive, fuse, libcdio
 , libxml2, libxslt, docbook_xsl, docbook_xml_dtd_42, samba, libmtp
diff --git a/pkgs/development/libraries/hunspell/dictionaries.nix b/pkgs/development/libraries/hunspell/dictionaries.nix
index ee8a5107b341..9f0a6c34512f 100644
--- a/pkgs/development/libraries/hunspell/dictionaries.nix
+++ b/pkgs/development/libraries/hunspell/dictionaries.nix
@@ -163,6 +163,7 @@ let
       name = "hunspell-dict-${shortName}-linguistico-${version}";
       readmeFile = dictFileName + "_README.txt";
       meta = with stdenv.lib; {
+        description = "Hunspell dictionary for ${shortDescription}";
         homepage = https://sourceforge.net/projects/linguistico/;
         license = licenses.gpl3;
         maintainers = with maintainers; [ renzo ];
diff --git a/pkgs/development/libraries/icu/base.nix b/pkgs/development/libraries/icu/base.nix
index ee868d371ce5..705fb816b2e5 100644
--- a/pkgs/development/libraries/icu/base.nix
+++ b/pkgs/development/libraries/icu/base.nix
@@ -1,5 +1,5 @@
 { version, sha256, patches ? [], patchFlags ? "" }:
-{ stdenv, fetchurl, fetchpatch, fixDarwinDylibNames
+{ stdenv, fetchurl, fixDarwinDylibNames
   # Cross-compiled icu4c requires a build-root of a native compile
 , buildRootOnly ? false, nativeBuildRoot, buildPlatform, hostPlatform
 }:
diff --git a/pkgs/development/libraries/ignition-transport/generic.nix b/pkgs/development/libraries/ignition-transport/generic.nix
index 3568edb7890c..8abff4c5f059 100644
--- a/pkgs/development/libraries/ignition-transport/generic.nix
+++ b/pkgs/development/libraries/ignition-transport/generic.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, cmake, pkgconfig, utillinux,
+{ stdenv, cmake, pkgconfig, utillinux,
   protobuf, zeromq, cppzmq,
   version, src    # parametrize version and src so we can easily have pkgs
                   # for different versions
diff --git a/pkgs/development/libraries/ijs/default.nix b/pkgs/development/libraries/ijs/default.nix
index ed500ca518fd..a5b226ee9c74 100644
--- a/pkgs/development/libraries/ijs/default.nix
+++ b/pkgs/development/libraries/ijs/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, autoreconfHook, ghostscript }:
+{ stdenv, autoreconfHook, ghostscript }:
 
 stdenv.mkDerivation {
   name = "ijs-${ghostscript.version}";
diff --git a/pkgs/development/libraries/iso-codes/default.nix b/pkgs/development/libraries/iso-codes/default.nix
index 4dfe190124b1..d78c59e9c25a 100644
--- a/pkgs/development/libraries/iso-codes/default.nix
+++ b/pkgs/development/libraries/iso-codes/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, gettext, python3, xz}:
+{stdenv, fetchurl, gettext, python3}:
 
 stdenv.mkDerivation rec {
   name = "iso-codes-${version}";
diff --git a/pkgs/development/libraries/itk/default.nix b/pkgs/development/libraries/itk/default.nix
index 5280a95afb40..5f6a6f51a522 100644
--- a/pkgs/development/libraries/itk/default.nix
+++ b/pkgs/development/libraries/itk/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, cmake, libX11, libuuid, xz, vtk }:
+{ stdenv, fetchurl, cmake, libX11, libuuid, xz, vtk }:
 
 stdenv.mkDerivation rec {
   name = "itk-4.13.0";
diff --git a/pkgs/development/libraries/jbig2dec/default.nix b/pkgs/development/libraries/jbig2dec/default.nix
index 8731bd8e7366..b9dcc927172f 100644
--- a/pkgs/development/libraries/jbig2dec/default.nix
+++ b/pkgs/development/libraries/jbig2dec/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch }:
+{ stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
   name = "jbig2dec-0.14";
diff --git a/pkgs/development/libraries/json-glib/default.nix b/pkgs/development/libraries/json-glib/default.nix
index a9b5d596b395..be83dbc52f45 100644
--- a/pkgs/development/libraries/json-glib/default.nix
+++ b/pkgs/development/libraries/json-glib/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, fetchpatch, glib, meson, ninja, pkgconfig, gettext
-, gobjectIntrospection, dbus, fixDarwinDylibNames, gnome3
+, gobjectIntrospection, fixDarwinDylibNames, gnome3
 }:
 
 let
diff --git a/pkgs/development/libraries/kde-frameworks/kcoreaddons.nix b/pkgs/development/libraries/kde-frameworks/kcoreaddons.nix
index cd5f2163dd95..d5a407ee16f2 100644
--- a/pkgs/development/libraries/kde-frameworks/kcoreaddons.nix
+++ b/pkgs/development/libraries/kde-frameworks/kcoreaddons.nix
@@ -1,5 +1,5 @@
 {
-  mkDerivation, lib, fetchurl, writeScript,
+  mkDerivation, lib,
   extra-cmake-modules,
   qtbase, qttools, shared-mime-info
 }:
diff --git a/pkgs/development/libraries/kde-frameworks/kdeclarative.nix b/pkgs/development/libraries/kde-frameworks/kdeclarative.nix
index 7aabeb021545..34e01b4c1b62 100644
--- a/pkgs/development/libraries/kde-frameworks/kdeclarative.nix
+++ b/pkgs/development/libraries/kde-frameworks/kdeclarative.nix
@@ -1,7 +1,7 @@
 {
   mkDerivation, lib, extra-cmake-modules,
   epoxy, kconfig, kglobalaccel, kguiaddons, ki18n, kiconthemes, kio, kpackage,
-  kwidgetsaddons, kwindowsystem, pkgconfig, qtdeclarative
+  kwidgetsaddons, kwindowsystem, qtdeclarative
 }:
 
 mkDerivation {
diff --git a/pkgs/development/libraries/kde-frameworks/kglobalaccel.nix b/pkgs/development/libraries/kde-frameworks/kglobalaccel.nix
index ae945ab73384..ca015151e0f1 100644
--- a/pkgs/development/libraries/kde-frameworks/kglobalaccel.nix
+++ b/pkgs/development/libraries/kde-frameworks/kglobalaccel.nix
@@ -1,5 +1,5 @@
 {
-  mkDerivation, lib,
+  mkDerivation,
   extra-cmake-modules,
   kconfig, kcoreaddons, kcrash, kdbusaddons, kservice, kwindowsystem,
   qtbase, qttools, qtx11extras,
diff --git a/pkgs/development/libraries/kde-frameworks/kpackage/default.nix b/pkgs/development/libraries/kde-frameworks/kpackage/default.nix
index c0b4b6312861..6779faa50cdc 100644
--- a/pkgs/development/libraries/kde-frameworks/kpackage/default.nix
+++ b/pkgs/development/libraries/kde-frameworks/kpackage/default.nix
@@ -1,5 +1,5 @@
 {
-  mkDerivation, fetchurl, lib, copyPathsToStore,
+  mkDerivation, lib, copyPathsToStore,
   extra-cmake-modules, kdoctools,
   karchive, kconfig, kcoreaddons, ki18n, qtbase,
 }:
diff --git a/pkgs/development/libraries/kde-frameworks/ktexteditor.nix b/pkgs/development/libraries/kde-frameworks/ktexteditor.nix
index 3efd4cf4e2a8..c633aee30a1b 100644
--- a/pkgs/development/libraries/kde-frameworks/ktexteditor.nix
+++ b/pkgs/development/libraries/kde-frameworks/ktexteditor.nix
@@ -1,5 +1,5 @@
 {
-  mkDerivation, lib, copyPathsToStore, fetchpatch,
+  mkDerivation, lib,
   extra-cmake-modules, perl,
   karchive, kconfig, kguiaddons, ki18n, kiconthemes, kio, kparts, libgit2,
   qtscript, qtxmlpatterns, sonnet, syntax-highlighting, qtquickcontrols
diff --git a/pkgs/development/libraries/keybinder3/default.nix b/pkgs/development/libraries/keybinder3/default.nix
index cf4b85043bb2..194b57c05342 100644
--- a/pkgs/development/libraries/keybinder3/default.nix
+++ b/pkgs/development/libraries/keybinder3/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, autoconf, automake, libtool, pkgconfig, gnome3
-, gtk-doc, gtk3, python, lua, libX11, libXext, libXrender, gobjectIntrospection
+, gtk-doc, gtk3, libX11, libXext, libXrender, gobjectIntrospection
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/kpmcore/default.nix b/pkgs/development/libraries/kpmcore/default.nix
index c6c3ba53d2c3..5c53f5e6ad5d 100644
--- a/pkgs/development/libraries/kpmcore/default.nix
+++ b/pkgs/development/libraries/kpmcore/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, extra-cmake-modules, pkgconfig
+{ stdenv, lib, fetchurl, extra-cmake-modules
 , qtbase, kdeFrameworks
 , libatasmart, parted
 , utillinux }:
diff --git a/pkgs/development/libraries/kreport/default.nix b/pkgs/development/libraries/kreport/default.nix
index 3f44dbb9c138..256989992c5a 100644
--- a/pkgs/development/libraries/kreport/default.nix
+++ b/pkgs/development/libraries/kreport/default.nix
@@ -1,7 +1,7 @@
 {
   mkDerivation, lib, fetchurl,
   extra-cmake-modules,
-  qtbase, qtdeclarative, qtwebkit, kconfig, kcoreaddons, kwidgetsaddons, kguiaddons, kproperty, marble, python2
+  qtdeclarative, qtwebkit, kconfig, kcoreaddons, kwidgetsaddons, kguiaddons, kproperty, marble, python2
 }:
 
 mkDerivation rec {
diff --git a/pkgs/development/libraries/languagemachines/frogdata.nix b/pkgs/development/libraries/languagemachines/frogdata.nix
index 61b4559ebab0..2c418c1bc5f5 100644
--- a/pkgs/development/libraries/languagemachines/frogdata.nix
+++ b/pkgs/development/libraries/languagemachines/frogdata.nix
@@ -1,7 +1,5 @@
 { stdenv, fetchurl
 , automake, autoconf, libtool, pkgconfig, autoconf-archive
-, libxml2, icu
-, languageMachines
 }:
 
 let
diff --git a/pkgs/development/libraries/languagemachines/uctodata.nix b/pkgs/development/libraries/languagemachines/uctodata.nix
index 7defa71fc0ee..01a78b5b4be6 100644
--- a/pkgs/development/libraries/languagemachines/uctodata.nix
+++ b/pkgs/development/libraries/languagemachines/uctodata.nix
@@ -1,7 +1,6 @@
 { stdenv, fetchurl
 , automake, autoconf, libtool, pkgconfig, autoconf-archive
-, libxml2, icu
-, languageMachines }:
+ }:
 
 let
   release = builtins.fromJSON (builtins.readFile ./release-info/LanguageMachines-uctodata.json);
diff --git a/pkgs/development/libraries/lensfun/default.nix b/pkgs/development/libraries/lensfun/default.nix
index 5791b0808b4a..e9ba4ae5ac21 100644
--- a/pkgs/development/libraries/lensfun/default.nix
+++ b/pkgs/development/libraries/lensfun/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, python, glib, zlib, libpng, gnumake3, cmake }:
+{ stdenv, fetchurl, pkgconfig, glib, zlib, libpng, gnumake3, cmake }:
 
 stdenv.mkDerivation rec {
   version = "0.3.2";
diff --git a/pkgs/development/libraries/libatomic_ops/default.nix b/pkgs/development/libraries/libatomic_ops/default.nix
index fde8a06eb416..0c0fc3861c9e 100644
--- a/pkgs/development/libraries/libatomic_ops/default.nix
+++ b/pkgs/development/libraries/libatomic_ops/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, autoconf, automake, libtool, hostPlatform }:
+{ stdenv, fetchurl, autoconf, automake, libtool }:
 
 stdenv.mkDerivation rec {
   name = "libatomic_ops-${version}";
diff --git a/pkgs/development/libraries/libbdplus/default.nix b/pkgs/development/libraries/libbdplus/default.nix
index 8b2f0b0da92d..3a1b77525143 100644
--- a/pkgs/development/libraries/libbdplus/default.nix
+++ b/pkgs/development/libraries/libbdplus/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, libgcrypt, libgpgerror, yacc, flex, gettext }:
+{ stdenv, fetchurl, libgcrypt, libgpgerror, gettext }:
 
 # library that allows libbluray to play BDplus protected bluray disks
 # libaacs does not infringe DRM's right or copyright. See the legal page of the website for more info.
diff --git a/pkgs/development/libraries/libbfd/default.nix b/pkgs/development/libraries/libbfd/default.nix
index 3f244d399f7e..c02e2108f237 100644
--- a/pkgs/development/libraries/libbfd/default.nix
+++ b/pkgs/development/libraries/libbfd/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, buildPackages
-, fetchurl, fetchpatch, gnu-config, autoreconfHook264, bison, binutils-unwrapped
+{ stdenv
+, fetchpatch, gnu-config, autoreconfHook264, bison, binutils-unwrapped
 , libiberty, zlib
 }:
 
diff --git a/pkgs/development/libraries/libchamplain/default.nix b/pkgs/development/libraries/libchamplain/default.nix
index 418e9cf0b573..e4864aded279 100644
--- a/pkgs/development/libraries/libchamplain/default.nix
+++ b/pkgs/development/libraries/libchamplain/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, pkgconfig, glib, gtk3, cairo, clutter, sqlite, gnome3
+{ fetchurl, stdenv, pkgconfig, glib, gtk3, cairo, sqlite, gnome3
 , clutter-gtk, libsoup, gobjectIntrospection /*, libmemphis */ }:
 
 let
diff --git a/pkgs/development/libraries/libcollectdclient/default.nix b/pkgs/development/libraries/libcollectdclient/default.nix
index 4f0ba439417f..4f4007649d04 100644
--- a/pkgs/development/libraries/libcollectdclient/default.nix
+++ b/pkgs/development/libraries/libcollectdclient/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, collectd }:
+{ stdenv, collectd }:
 with stdenv.lib;
 
 collectd.overrideAttrs (oldAttrs: {
diff --git a/pkgs/development/libraries/libdazzle/default.nix b/pkgs/development/libraries/libdazzle/default.nix
index 7f4eaa5fd14b..295028abc97d 100644
--- a/pkgs/development/libraries/libdazzle/default.nix
+++ b/pkgs/development/libraries/libdazzle/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, pkgs, fetchurl, ninja, meson, pkgconfig, vala, gobjectIntrospection, libxml2
+{ stdenv, fetchurl, ninja, meson, pkgconfig, vala, gobjectIntrospection, libxml2
 , gtk-doc, docbook_xsl, dbus, xvfb_run, glib, gtk3, gnome3 }:
 
 let
diff --git a/pkgs/development/libraries/libedit/default.nix b/pkgs/development/libraries/libedit/default.nix
index bc4cea1b4702..c68e171084b9 100644
--- a/pkgs/development/libraries/libedit/default.nix
+++ b/pkgs/development/libraries/libedit/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, ncurses, groff }:
+{ stdenv, fetchurl, ncurses }:
 
 stdenv.mkDerivation rec {
   name = "libedit-20180525-3.1";
diff --git a/pkgs/development/libraries/libewf/default.nix b/pkgs/development/libraries/libewf/default.nix
index b1a6238a3780..d150d4a00330 100644
--- a/pkgs/development/libraries/libewf/default.nix
+++ b/pkgs/development/libraries/libewf/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, zlib, openssl, libuuid, file, fuse, autoreconfHook, pkgconfig }:
+{ fetchurl, stdenv, zlib, openssl, libuuid, pkgconfig }:
 
 stdenv.mkDerivation rec {
   version = "20171104";
diff --git a/pkgs/development/libraries/libgdiplus/default.nix b/pkgs/development/libraries/libgdiplus/default.nix
index 05c320c42aec..5e94d00dcdb7 100644
--- a/pkgs/development/libraries/libgdiplus/default.nix
+++ b/pkgs/development/libraries/libgdiplus/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, pkgconfig, glib, cairo, Carbon, fontconfig
-, libtiff, giflib, libjpeg, libpng, monoDLLFixer
+, libtiff, giflib, libjpeg, libpng
 , libXrender, libexif }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/libgksu/default.nix b/pkgs/development/libraries/libgksu/default.nix
index 652848d8a955..29f346e9acfb 100644
--- a/pkgs/development/libraries/libgksu/default.nix
+++ b/pkgs/development/libraries/libgksu/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, pkgconfig, wrapGAppsHook, gtk2, gnome2, gnome3,
   libstartup_notification, libgtop, perl, perlXMLParser,
-  autoreconfHook, intltool, docbook_xsl, xauth, sudo
+  autoreconfHook, intltool, docbook_xsl, xauth
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/libgphoto2/default.nix b/pkgs/development/libraries/libgphoto2/default.nix
index 96b42ac068cc..8616a0146755 100644
--- a/pkgs/development/libraries/libgphoto2/default.nix
+++ b/pkgs/development/libraries/libgphoto2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchpatch, fetchFromGitHub, pkgconfig, libusb1, libtool, libexif, libjpeg, gettext, autoreconfHook }:
+{ stdenv, fetchFromGitHub, pkgconfig, libusb1, libtool, libexif, libjpeg, gettext, autoreconfHook }:
 
 stdenv.mkDerivation rec {
   name = "libgphoto2-${meta.version}";
diff --git a/pkgs/development/libraries/libgpod/default.nix b/pkgs/development/libraries/libgpod/default.nix
index fbe421e9974e..c6056ee49fbf 100644
--- a/pkgs/development/libraries/libgpod/default.nix
+++ b/pkgs/development/libraries/libgpod/default.nix
@@ -1,5 +1,5 @@
 {stdenv, lib, fetchurl, gettext, perl, perlXMLParser, intltool, pkgconfig, glib,
-  libxml2, sqlite, libusb1, zlib, sg3_utils, gdk_pixbuf, taglib,
+  libxml2, sqlite, zlib, sg3_utils, gdk_pixbuf, taglib,
   libimobiledevice, pythonPackages, mutagen,
   monoSupport ? true, mono, gtk-sharp-2_0
 }:
diff --git a/pkgs/development/libraries/libgtop/default.nix b/pkgs/development/libraries/libgtop/default.nix
index 6498014aee8d..d0be9e25b87e 100644
--- a/pkgs/development/libraries/libgtop/default.nix
+++ b/pkgs/development/libraries/libgtop/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, glib, pkgconfig, perl, gettext, gobjectIntrospection, libintl, libtool, gnome3, gtk-doc }:
+{ stdenv, fetchurl, fetchpatch, glib, pkgconfig, perl, gettext, gobjectIntrospection, libtool, gnome3, gtk-doc }:
 let
   pname = "libgtop";
   version = "2.38.0";
diff --git a/pkgs/development/libraries/libiberty/default.nix b/pkgs/development/libraries/libiberty/default.nix
index 516e6bbbe88c..bcc85abbd3ef 100644
--- a/pkgs/development/libraries/libiberty/default.nix
+++ b/pkgs/development/libraries/libiberty/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPackages, fetchurl, staticBuild ? false }:
+{ stdenv, buildPackages, staticBuild ? false }:
 
 let inherit (buildPackages.buildPackages) gcc; in
 
diff --git a/pkgs/development/libraries/libid3tag/default.nix b/pkgs/development/libraries/libid3tag/default.nix
index a153001a9600..0289a5331f89 100644
--- a/pkgs/development/libraries/libid3tag/default.nix
+++ b/pkgs/development/libraries/libid3tag/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, writeText, zlib, gperf}:
+{stdenv, fetchurl, zlib, gperf}:
 
 stdenv.mkDerivation rec {
   name = "libid3tag-${version}";
diff --git a/pkgs/development/libraries/libidn2/default.nix b/pkgs/development/libraries/libidn2/default.nix
index a100b0cc5932..dd8e3c4a4f87 100644
--- a/pkgs/development/libraries/libidn2/default.nix
+++ b/pkgs/development/libraries/libidn2/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, libiconv, libunistring, help2man, ronn, buildPackages }:
+{ fetchurl, stdenv, libiconv, libunistring, help2man, buildPackages }:
 
 with stdenv.lib;
 
diff --git a/pkgs/development/libraries/libircclient/default.nix b/pkgs/development/libraries/libircclient/default.nix
index fef5e7278b81..612de78b741d 100644
--- a/pkgs/development/libraries/libircclient/default.nix
+++ b/pkgs/development/libraries/libircclient/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, cmake }:
+{ stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
   name    = "${pname}-${version}";
diff --git a/pkgs/development/libraries/libjson-rpc-cpp/default.nix b/pkgs/development/libraries/libjson-rpc-cpp/default.nix
index 87cae2246852..f352c8e9ed19 100644
--- a/pkgs/development/libraries/libjson-rpc-cpp/default.nix
+++ b/pkgs/development/libraries/libjson-rpc-cpp/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, cmake, jsoncpp, argtable, curl, libmicrohttpd
-, doxygen, catch, pkgconfig, git
+, doxygen, catch, pkgconfig
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/libndctl/default.nix b/pkgs/development/libraries/libndctl/default.nix
index 4b547fde3ab0..79439f822696 100644
--- a/pkgs/development/libraries/libndctl/default.nix
+++ b/pkgs/development/libraries/libndctl/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, autoreconfHook, autoconf, automake, asciidoc, docbook_xsl, docbook_xml_dtd_45, libxslt, xmlto, pkgconfig, json_c, kmod, which, systemd, utillinux
+{ stdenv, fetchFromGitHub, fetchpatch, autoreconfHook, asciidoc, docbook_xsl, docbook_xml_dtd_45, libxslt, xmlto, pkgconfig, json_c, kmod, which, systemd, utillinux
 }:
 
 let
diff --git a/pkgs/development/libraries/libopcodes/default.nix b/pkgs/development/libraries/libopcodes/default.nix
index c918c61abf0d..2c59fa03ea06 100644
--- a/pkgs/development/libraries/libopcodes/default.nix
+++ b/pkgs/development/libraries/libopcodes/default.nix
@@ -1,5 +1,5 @@
 { stdenv, buildPackages
-, fetchurl, autoreconfHook264, bison, binutils-unwrapped
+, autoreconfHook264, bison, binutils-unwrapped
 , libiberty, libbfd
 }:
 
diff --git a/pkgs/development/libraries/libopus/default.nix b/pkgs/development/libraries/libopus/default.nix
index 66c7e7e882e8..135f1caf97e2 100644
--- a/pkgs/development/libraries/libopus/default.nix
+++ b/pkgs/development/libraries/libopus/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch
+{ stdenv, fetchurl
 , fixedPoint ? false, withCustomModes ? true }:
 
 let
diff --git a/pkgs/development/libraries/libplist/default.nix b/pkgs/development/libraries/libplist/default.nix
index 8da097c3d386..8dc64f2c2b57 100644
--- a/pkgs/development/libraries/libplist/default.nix
+++ b/pkgs/development/libraries/libplist/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, libxml2, swig2, python2Packages, glib }:
+{ stdenv, fetchurl, pkgconfig, swig2, python2Packages, glib }:
 
 let
   inherit (python2Packages) python cython;
diff --git a/pkgs/development/libraries/libpng/default.nix b/pkgs/development/libraries/libpng/default.nix
index 5ad9cf1e7b77..4173588ac522 100644
--- a/pkgs/development/libraries/libpng/default.nix
+++ b/pkgs/development/libraries/libpng/default.nix
@@ -1,6 +1,4 @@
-{ stdenv, fetchurl, zlib, apngSupport ? true
-, buildPlatform, hostPlatform
-}:
+{ stdenv, fetchurl, zlib, apngSupport ? true }:
 
 assert zlib != null;
 
diff --git a/pkgs/development/libraries/libproxy/default.nix b/pkgs/development/libraries/libproxy/default.nix
index 02e634b22a34..0e0499251eb9 100644
--- a/pkgs/development/libraries/libproxy/default.nix
+++ b/pkgs/development/libraries/libproxy/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, pkgconfig, cmake, zlib
+{ stdenv, fetchFromGitHub, pkgconfig, cmake, zlib
 , dbus, networkmanager, spidermonkey_38, pcre, python2, python3
 , SystemConfiguration, CoreFoundation, JavaScriptCore }:
 
diff --git a/pkgs/development/libraries/librdf/raptor2.nix b/pkgs/development/libraries/librdf/raptor2.nix
index b7a78cb3daf6..3f4366771235 100644
--- a/pkgs/development/libraries/librdf/raptor2.nix
+++ b/pkgs/development/libraries/librdf/raptor2.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, libxml2, libxslt, curl }:
+{ stdenv, fetchurl, libxml2, libxslt }:
 
 stdenv.mkDerivation rec {
   name = "raptor2-2.0.15";
diff --git a/pkgs/development/libraries/libsecret/default.nix b/pkgs/development/libraries/libsecret/default.nix
index b77ba49822fd..f311d1a03353 100644
--- a/pkgs/development/libraries/libsecret/default.nix
+++ b/pkgs/development/libraries/libsecret/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, glib, pkgconfig, intltool, libxslt, docbook_xsl, gtk-doc
+{ stdenv, fetchurl, glib, pkgconfig, intltool, libxslt, docbook_xsl
 , libgcrypt, gobjectIntrospection, vala_0_38, gnome3, libintl }:
 let
   pname = "libsecret";
diff --git a/pkgs/development/libraries/libsigcxx/default.nix b/pkgs/development/libraries/libsigcxx/default.nix
index f6bfff78fa26..def5ee0e19a2 100644
--- a/pkgs/development/libraries/libsigcxx/default.nix
+++ b/pkgs/development/libraries/libsigcxx/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, pkgconfig, gnum4 }:
+{ stdenv, fetchurl, pkgconfig, gnum4 }:
 let
   ver_maj = "2.10"; # odd major numbers are unstable
   ver_min = "0";
diff --git a/pkgs/development/libraries/libsigsegv/default.nix b/pkgs/development/libraries/libsigsegv/default.nix
index 8152c1ea8524..306c73a9b551 100644
--- a/pkgs/development/libraries/libsigsegv/default.nix
+++ b/pkgs/development/libraries/libsigsegv/default.nix
@@ -1,5 +1,4 @@
 { stdenv, fetchurl
-, buildPlatform, hostPlatform
 , enableSigbusFix ? false # required by kernels < 3.18.6
 }:
 
diff --git a/pkgs/development/libraries/libskk/default.nix b/pkgs/development/libraries/libskk/default.nix
index 48b0ed6d711c..b64c3e517782 100644
--- a/pkgs/development/libraries/libskk/default.nix
+++ b/pkgs/development/libraries/libskk/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub,
+{ stdenv, fetchFromGitHub,
   libtool, gettext, pkgconfig,
   vala, gnome-common, gobjectIntrospection,
   libgee, json-glib, skk-dicts }:
diff --git a/pkgs/development/libraries/libsnark/default.nix b/pkgs/development/libraries/libsnark/default.nix
index 578053bbb427..4ea2209160f8 100644
--- a/pkgs/development/libraries/libsnark/default.nix
+++ b/pkgs/development/libraries/libsnark/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, cmake, pkgconfig, openssl, boost, gmp, procps, fetchpatch, patchutils }:
+{ stdenv, fetchFromGitHub, cmake, pkgconfig, openssl, boost, gmp, procps }:
 
 let
   rev = "9e6b19ff15bc19fba5da1707ba18e7f160e5ed07";
diff --git a/pkgs/development/libraries/libtheora/default.nix b/pkgs/development/libraries/libtheora/default.nix
index fd58f4f44e78..b5ab9d310da3 100644
--- a/pkgs/development/libraries/libtheora/default.nix
+++ b/pkgs/development/libraries/libtheora/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, libogg, libvorbis, tremor, autoconf, automake, libtool, pkgconfig}:
+{stdenv, fetchurl, libogg, libvorbis, pkgconfig}:
 
 stdenv.mkDerivation rec {
   name = "libtheora-1.1.1";
diff --git a/pkgs/development/libraries/libtiff/default.nix b/pkgs/development/libraries/libtiff/default.nix
index c492a15bfa4e..c5a12432280b 100644
--- a/pkgs/development/libraries/libtiff/default.nix
+++ b/pkgs/development/libraries/libtiff/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, pkgconfig, zlib, libjpeg, xz }:
+{ stdenv, fetchurl, pkgconfig, zlib, libjpeg, xz }:
 
 let
   version = "4.0.9";
diff --git a/pkgs/development/libraries/libunwind/default.nix b/pkgs/development/libraries/libunwind/default.nix
index dbf1d7a3756f..6a32ccf5c1b1 100644
--- a/pkgs/development/libraries/libunwind/default.nix
+++ b/pkgs/development/libraries/libunwind/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, autoreconfHook, xz }:
+{ stdenv, fetchurl, autoreconfHook, xz }:
 
 stdenv.mkDerivation rec {
   name = "libunwind-${version}";
diff --git a/pkgs/development/libraries/libva-utils/default.nix b/pkgs/development/libraries/libva-utils/default.nix
index 95d4be08548a..6868e5c8cfa9 100644
--- a/pkgs/development/libraries/libva-utils/default.nix
+++ b/pkgs/development/libraries/libva-utils/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, autoreconfHook, pkgconfig
+{ stdenv, fetchFromGitHub, autoreconfHook, pkgconfig
 , libdrm, libva
 }:
 
diff --git a/pkgs/development/libraries/libvpx/default.nix b/pkgs/development/libraries/libvpx/default.nix
index 731892d33b4d..4338a7090701 100644
--- a/pkgs/development/libraries/libvpx/default.nix
+++ b/pkgs/development/libraries/libvpx/default.nix
@@ -33,7 +33,6 @@
 , temporalDenoisingSupport ? true # use temporal denoising instead of spatial denoising
 , coefficientRangeCheckingSupport ? false # decoder checks if intermediate transform coefficients are in valid range
 , vp9HighbitdepthSupport ? true # 10/12 bit color support in VP9
-, experimentalSupport ? false # experimental features
 # Experimental features
 , experimentalSpatialSvcSupport ? false # Spatial scalable video coding
 , experimentalFpMbStatsSupport ? false
diff --git a/pkgs/development/libraries/libvpx/git.nix b/pkgs/development/libraries/libvpx/git.nix
index 7d4b75d6cdf8..fb7f828f61f0 100644
--- a/pkgs/development/libraries/libvpx/git.nix
+++ b/pkgs/development/libraries/libvpx/git.nix
@@ -35,7 +35,6 @@
 , temporalDenoisingSupport ? true # use temporal denoising instead of spatial denoising
 , coefficientRangeCheckingSupport ? false # decoder checks if intermediate transform coefficients are in valid range
 , vp9HighbitdepthSupport ? true # 10/12 bit color support in VP9
-, experimentalSupport ? false # experimental features
 # Experimental features
 , experimentalSpatialSvcSupport ? false # Spatial scalable video coding
 , experimentalFpMbStatsSupport ? false
diff --git a/pkgs/development/libraries/libxml2/default.nix b/pkgs/development/libraries/libxml2/default.nix
index 8a3d7abdfa57..51c142a81119 100644
--- a/pkgs/development/libraries/libxml2/default.nix
+++ b/pkgs/development/libraries/libxml2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, fetchpatch
+{ stdenv, lib, fetchurl
 , zlib, xz, python2, findXMLCatalogs, libiconv
 , buildPlatform, hostPlatform
 , pythonSupport ? buildPlatform == hostPlatform
diff --git a/pkgs/development/libraries/libxslt/default.nix b/pkgs/development/libraries/libxslt/default.nix
index 1bb90ee195da..5b6fdb462c2c 100644
--- a/pkgs/development/libraries/libxslt/default.nix
+++ b/pkgs/development/libraries/libxslt/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, libxml2, findXMLCatalogs, python2
+{ stdenv, fetchurl, libxml2, findXMLCatalogs, python2
 , buildPlatform, hostPlatform
 , cryptoSupport ? false
 , pythonSupport ? buildPlatform == hostPlatform
diff --git a/pkgs/development/libraries/libyaml-cpp/default.nix b/pkgs/development/libraries/libyaml-cpp/default.nix
index ff09aeab2c6f..af665c6d9a4a 100644
--- a/pkgs/development/libraries/libyaml-cpp/default.nix
+++ b/pkgs/development/libraries/libyaml-cpp/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, cmake, boost }:
+{ stdenv, fetchFromGitHub, cmake }:
 
 stdenv.mkDerivation rec {
   name = "libyaml-cpp-${version}";
diff --git a/pkgs/development/libraries/libyaml/default.nix b/pkgs/development/libraries/libyaml/default.nix
index 7178e64b6b6a..7bd0d1970f4e 100644
--- a/pkgs/development/libraries/libyaml/default.nix
+++ b/pkgs/development/libraries/libyaml/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch }:
+{ stdenv, fetchurl }:
 let
   version = "0.1.7";
 in
diff --git a/pkgs/development/libraries/linenoise-ng/default.nix b/pkgs/development/libraries/linenoise-ng/default.nix
index 3f008744c1b4..5fa1035868d1 100644
--- a/pkgs/development/libraries/linenoise-ng/default.nix
+++ b/pkgs/development/libraries/linenoise-ng/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, cmake }:
+{ stdenv, fetchFromGitHub, cmake }:
 
 stdenv.mkDerivation rec {
   name = "linenoise-ng-${version}";
diff --git a/pkgs/development/libraries/lirc/default.nix b/pkgs/development/libraries/lirc/default.nix
index 7f4d8cc19c8e..ad6d2df1d8bd 100644
--- a/pkgs/development/libraries/lirc/default.nix
+++ b/pkgs/development/libraries/lirc/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, alsaLib, bash, help2man, pkgconfig, xlibsWrapper, python3
+{ stdenv, fetchurl, alsaLib, help2man, pkgconfig, xlibsWrapper, python3
 , libxslt, systemd, libusb, libftdi1 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/lucene++/default.nix b/pkgs/development/libraries/lucene++/default.nix
index 93c8a0474d96..c45fa6bc61aa 100644
--- a/pkgs/development/libraries/lucene++/default.nix
+++ b/pkgs/development/libraries/lucene++/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, cmake, boost, gtest }:
+{ stdenv, fetchurl, cmake, boost, gtest }:
 
 stdenv.mkDerivation rec {
   name = "lucene++-${version}";
diff --git a/pkgs/development/libraries/mediastreamer/default.nix b/pkgs/development/libraries/mediastreamer/default.nix
index 8b756e338e48..4b69d5d0aafe 100644
--- a/pkgs/development/libraries/mediastreamer/default.nix
+++ b/pkgs/development/libraries/mediastreamer/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, intltool, alsaLib, libpulseaudio, speex, gsm
+{ stdenv, pkgconfig, intltool, alsaLib, libpulseaudio, speex, gsm
 , libopus, ffmpeg, libX11, libXv, libGLU_combined, glew, libtheora, libvpx, SDL, libupnp
 , ortp, libv4l, libpcap, srtp, fetchFromGitHub, cmake, bctoolbox, doxygen
 , python, libXext, libmatroska, openssl, fetchpatch
diff --git a/pkgs/development/libraries/mediastreamer/msopenh264.nix b/pkgs/development/libraries/mediastreamer/msopenh264.nix
index f49b7ba2c4b4..b8a8c64011ca 100644
--- a/pkgs/development/libraries/mediastreamer/msopenh264.nix
+++ b/pkgs/development/libraries/mediastreamer/msopenh264.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, autoreconfHook, pkgconfig, mediastreamer, openh264
+{ stdenv, autoreconfHook, pkgconfig, mediastreamer, openh264
 , fetchgit, cmake
 }:
 
diff --git a/pkgs/development/libraries/mesa-darwin/default.nix b/pkgs/development/libraries/mesa-darwin/default.nix
index 0ae17b4d3f61..f18c1e693cbc 100644
--- a/pkgs/development/libraries/mesa-darwin/default.nix
+++ b/pkgs/development/libraries/mesa-darwin/default.nix
@@ -1,7 +1,5 @@
-{ stdenv, stdenvAdapters, fetchurl, pkgconfig, intltool, flex, bison
-, python, libxml2Python, file, expat, makedepend, xorg, llvm, libffi, libvdpau
-, enableTextureFloats ? false # Texture floats are patented, see docs/patents.txt
-, enableExtraFeatures ? false # not maintained
+{ stdenv, fetchurl, pkgconfig, intltool, flex, bison
+, python, libxml2Python, expat, makedepend, xorg, llvm, libffi, libvdpau
 , OpenGL, apple_sdk, Xplugin
 }:
 
diff --git a/pkgs/development/libraries/mesa/default.nix b/pkgs/development/libraries/mesa/default.nix
index 9c0bf29d4908..028930ba066d 100644
--- a/pkgs/development/libraries/mesa/default.nix
+++ b/pkgs/development/libraries/mesa/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, fetchurl, fetchpatch, lib
-, pkgconfig, intltool, autoreconfHook, substituteAll
+{ stdenv, fetchurl, lib
+, pkgconfig, intltool, autoreconfHook
 , file, expat, libdrm, xorg, wayland, wayland-protocols, openssl
 , llvmPackages, libffi, libomxil-bellagio, libva-minimal
 , libelf, libvdpau, valgrind-light, python2
diff --git a/pkgs/development/libraries/mlt/default.nix b/pkgs/development/libraries/mlt/default.nix
index 2d4de3390422..d8075c41a703 100644
--- a/pkgs/development/libraries/mlt/default.nix
+++ b/pkgs/development/libraries/mlt/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchurl, makeWrapper
+{ stdenv, fetchFromGitHub, makeWrapper
 , SDL, ffmpeg, frei0r, libjack2, libdv, libsamplerate
 , libvorbis, libxml2, movit, pkgconfig, sox
 , gtk2
diff --git a/pkgs/development/libraries/mono-zeroconf/default.nix b/pkgs/development/libraries/mono-zeroconf/default.nix
index 444ec9dac2be..d96f90b4bfd6 100644
--- a/pkgs/development/libraries/mono-zeroconf/default.nix
+++ b/pkgs/development/libraries/mono-zeroconf/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, autoreconfHook, which, pkgconfig, mono }:
+{ stdenv, fetchurl, which, pkgconfig, mono }:
 
 stdenv.mkDerivation rec {
   name = "mono-zeroconf-${version}";
diff --git a/pkgs/development/libraries/mpich2/default.nix b/pkgs/development/libraries/mpich2/default.nix
index 6c5a0e5279ce..b5a36c184ff7 100644
--- a/pkgs/development/libraries/mpich2/default.nix
+++ b/pkgs/development/libraries/mpich2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, python, perl, gfortran
+{ stdenv, fetchurl, perl, gfortran
 , slurm, openssh, hwloc
 } :
 
diff --git a/pkgs/development/libraries/mpir/default.nix b/pkgs/development/libraries/mpir/default.nix
index b9b25e7f43b3..2ecae98387e1 100644
--- a/pkgs/development/libraries/mpir/default.nix
+++ b/pkgs/development/libraries/mpir/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, m4, which, yasm }:
+{ stdenv, fetchurl, m4, which, yasm }:
 
 stdenv.mkDerivation rec {
   name = "mpir-${version}";
diff --git a/pkgs/development/libraries/neardal/default.nix b/pkgs/development/libraries/neardal/default.nix
index e0adb312677c..65679c7e2825 100644
--- a/pkgs/development/libraries/neardal/default.nix
+++ b/pkgs/development/libraries/neardal/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, autoconf, automake, libtool, gettext, pkgconfig, glib, readline, makeWrapper }:
+{ stdenv, fetchFromGitHub, autoconf, automake, libtool, pkgconfig, glib, readline, makeWrapper }:
 
 stdenv.mkDerivation rec {
   name = "neardal-0.7-post-git-20150930";
diff --git a/pkgs/development/libraries/ntrack/default.nix b/pkgs/development/libraries/ntrack/default.nix
index 3483d4bed778..fb36839fe233 100644
--- a/pkgs/development/libraries/ntrack/default.nix
+++ b/pkgs/development/libraries/ntrack/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, glib, qt4, pkgconfig, libnl, python }:
+{ stdenv, fetchurl, qt4, pkgconfig, libnl, python }:
 
 let
   version = "016";
diff --git a/pkgs/development/libraries/odpic/default.nix b/pkgs/development/libraries/odpic/default.nix
index 94aba672887d..2715ff4dfaff 100644
--- a/pkgs/development/libraries/odpic/default.nix
+++ b/pkgs/development/libraries/odpic/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, fixDarwinDylibNames, oracle-instantclient, libaio }:
+{ stdenv, fetchurl, fixDarwinDylibNames, oracle-instantclient, libaio }:
 
 stdenv.mkDerivation rec {
   name = "odpic-${version}";
diff --git a/pkgs/development/libraries/opencv/3.x.nix b/pkgs/development/libraries/opencv/3.x.nix
index 1d3a9629fd0c..264c05e1af9d 100644
--- a/pkgs/development/libraries/opencv/3.x.nix
+++ b/pkgs/development/libraries/opencv/3.x.nix
@@ -1,5 +1,5 @@
 { lib, stdenv
-, fetchurl, fetchFromGitHub, fetchpatch
+, fetchurl, fetchFromGitHub
 , cmake, pkgconfig, unzip, zlib, pcre, hdf5
 , glog, boost, google-gflags, protobuf
 , config
diff --git a/pkgs/development/libraries/openexr/default.nix b/pkgs/development/libraries/openexr/default.nix
index 60ee30177c02..293274a57767 100644
--- a/pkgs/development/libraries/openexr/default.nix
+++ b/pkgs/development/libraries/openexr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, fetchpatch, autoconf, automake, libtool, pkgconfig, zlib, ilmbase }:
+{ lib, stdenv, fetchurl, autoconf, automake, libtool, pkgconfig, zlib, ilmbase }:
 
 stdenv.mkDerivation rec {
   name = "openexr-${lib.getVersion ilmbase}";
diff --git a/pkgs/development/libraries/openpam/default.nix b/pkgs/development/libraries/openpam/default.nix
index 187f86133756..7d84392d204a 100644
--- a/pkgs/development/libraries/openpam/default.nix
+++ b/pkgs/development/libraries/openpam/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPackages, hostPlatform, fetchurl, lib }:
+{ stdenv, fetchurl, lib }:
 
 stdenv.mkDerivation rec {
   name = "openpam-${version}";
diff --git a/pkgs/development/libraries/openssl/default.nix b/pkgs/development/libraries/openssl/default.nix
index 0251de77d03e..b4b932f8d058 100644
--- a/pkgs/development/libraries/openssl/default.nix
+++ b/pkgs/development/libraries/openssl/default.nix
@@ -1,6 +1,5 @@
 { stdenv, fetchurl, buildPackages, perl
 , buildPlatform, hostPlatform
-, fetchpatch
 , withCryptodev ? false, cryptodevHeaders
 , enableSSL2 ? false
 }:
diff --git a/pkgs/development/libraries/opensubdiv/default.nix b/pkgs/development/libraries/opensubdiv/default.nix
index 62c093f310fb..b10e4713019d 100644
--- a/pkgs/development/libraries/opensubdiv/default.nix
+++ b/pkgs/development/libraries/opensubdiv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, fetchFromGitHub, cmake, pkgconfig, xorg, libGLU
+{ lib, stdenv, fetchFromGitHub, cmake, pkgconfig, xorg, libGLU
 , libGL, glew, ocl-icd, python3
 , cudaSupport ? false, cudatoolkit
 , darwin
diff --git a/pkgs/development/libraries/ortp/default.nix b/pkgs/development/libraries/ortp/default.nix
index 5dc5df8e95b9..e58e347c7f3e 100644
--- a/pkgs/development/libraries/ortp/default.nix
+++ b/pkgs/development/libraries/ortp/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, cmake, fetchFromGitHub, bctoolbox }:
+{ stdenv, cmake, fetchFromGitHub, bctoolbox }:
 
 stdenv.mkDerivation rec {
   baseName = "ortp";
diff --git a/pkgs/development/libraries/pango/default.nix b/pkgs/development/libraries/pango/default.nix
index 9a27901c862d..0dd507d6bb4d 100644
--- a/pkgs/development/libraries/pango/default.nix
+++ b/pkgs/development/libraries/pango/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, pkgconfig, libXft, cairo, harfbuzz
+{ stdenv, fetchurl, pkgconfig, libXft, cairo, harfbuzz
 , libintl, gobjectIntrospection, darwin
 }:
 
diff --git a/pkgs/development/libraries/pcre2/default.nix b/pkgs/development/libraries/pcre2/default.nix
index 73e7fd42cdba..e0819cde679b 100644
--- a/pkgs/development/libraries/pcre2/default.nix
+++ b/pkgs/development/libraries/pcre2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch }:
+{ stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
   name = "pcre2-${version}";
diff --git a/pkgs/development/libraries/physics/herwig/default.nix b/pkgs/development/libraries/physics/herwig/default.nix
index 9993060eb728..a8655c2dcbe3 100644
--- a/pkgs/development/libraries/physics/herwig/default.nix
+++ b/pkgs/development/libraries/physics/herwig/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchpatch, fetchurl, boost, fastjet, gfortran, gsl, lhapdf, thepeg, zlib, autoconf, automake, libtool }:
+{ stdenv, fetchurl, boost, fastjet, gfortran, gsl, lhapdf, thepeg, zlib, autoconf, automake, libtool }:
 
 stdenv.mkDerivation rec {
   name = "herwig-${version}";
diff --git a/pkgs/development/libraries/physics/mcgrid/default.nix b/pkgs/development/libraries/physics/mcgrid/default.nix
index 32a05d10d3a6..b287e52b2431 100644
--- a/pkgs/development/libraries/physics/mcgrid/default.nix
+++ b/pkgs/development/libraries/physics/mcgrid/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fastnlo, rivet, pkgconfig, sherpa }:
+{ stdenv, fetchurl, fastnlo, rivet, pkgconfig }:
 
 stdenv.mkDerivation rec {
   name = "mcgrid-${version}";
diff --git a/pkgs/development/libraries/physics/nlojet/default.nix b/pkgs/development/libraries/physics/nlojet/default.nix
index 0c9d879fbd09..2f79a2b76ab9 100644
--- a/pkgs/development/libraries/physics/nlojet/default.nix
+++ b/pkgs/development/libraries/physics/nlojet/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch }:
+{ stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
   name = "nlojet++-${version}";
diff --git a/pkgs/development/libraries/physics/yoda/default.nix b/pkgs/development/libraries/physics/yoda/default.nix
index eb34b94118a9..1dacdba1b1ce 100644
--- a/pkgs/development/libraries/physics/yoda/default.nix
+++ b/pkgs/development/libraries/physics/yoda/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, python2Packages, root, makeWrapper, zlib, withRootSupport ? false }:
+{ stdenv, fetchurl, python2Packages, root, makeWrapper, zlib, withRootSupport ? false }:
 
 stdenv.mkDerivation rec {
   name = "yoda-${version}";
diff --git a/pkgs/development/libraries/postgis/default.nix b/pkgs/development/libraries/postgis/default.nix
index aa9a3f9fdc0a..a577d318523d 100644
--- a/pkgs/development/libraries/postgis/default.nix
+++ b/pkgs/development/libraries/postgis/default.nix
@@ -1,12 +1,10 @@
 { fetchurl
-, fetchpatch
 , stdenv
 , perl
 , libxml2
 , postgresql
 , geos
 , proj
-, flex
 , gdal
 , json_c
 , pkgconfig
diff --git a/pkgs/development/libraries/protobuf/generic.nix b/pkgs/development/libraries/protobuf/generic.nix
index 06154e0008ba..1a20d806b968 100644
--- a/pkgs/development/libraries/protobuf/generic.nix
+++ b/pkgs/development/libraries/protobuf/generic.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, version, src
+{ stdenv, version, src
 , autoreconfHook, zlib, gtest
 , ...
 }:
diff --git a/pkgs/development/libraries/qimageblitz/default.nix b/pkgs/development/libraries/qimageblitz/default.nix
index 4e74e31e3ec8..51253676341f 100644
--- a/pkgs/development/libraries/qimageblitz/default.nix
+++ b/pkgs/development/libraries/qimageblitz/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, lib, cmake, qt4}:
+{stdenv, fetchurl, cmake, qt4}:
 
 let
   pn = "qimageblitz";
diff --git a/pkgs/development/libraries/qt-4.x/4.8/default.nix b/pkgs/development/libraries/qt-4.x/4.8/default.nix
index 4227575acb09..01d0fc510aaa 100644
--- a/pkgs/development/libraries/qt-4.x/4.8/default.nix
+++ b/pkgs/development/libraries/qt-4.x/4.8/default.nix
@@ -1,8 +1,8 @@
 { stdenv, fetchurl, fetchpatch, substituteAll
 , hostPlatform
-, libXrender, libXinerama, libXcursor, libXmu, libXv, libXext
+, libXrender, libXinerama, libXcursor, libXv, libXext
 , libXfixes, libXrandr, libSM, freetype, fontconfig, zlib, libjpeg, libpng
-, libmng, which, libGLSupported, libGL, libGLU, openssl, dbus, cups, pkgconfig
+, libmng, which, libGLSupported, libGLU, openssl, dbus, cups, pkgconfig
 , libtiff, glib, icu, mysql, postgresql, sqlite, perl, coreutils, libXi
 , buildMultimedia ? stdenv.isLinux, alsaLib, gstreamer, gst-plugins-base
 , buildWebkit ? (stdenv.isLinux || stdenv.isDarwin)
diff --git a/pkgs/development/libraries/qt-5/5.11/default.nix b/pkgs/development/libraries/qt-5/5.11/default.nix
index 5407a79cd775..2a706fc7b6e8 100644
--- a/pkgs/development/libraries/qt-5/5.11/default.nix
+++ b/pkgs/development/libraries/qt-5/5.11/default.nix
@@ -17,7 +17,7 @@ top-level attribute to `top-level/all-packages.nix`.
 
 {
   newScope,
-  stdenv, fetchurl, fetchFromGitHub, makeSetupHook, makeWrapper,
+  stdenv, fetchurl, fetchFromGitHub, makeSetupHook,
   bison, cups ? null, harfbuzz, libGL, perl,
   gstreamer, gst-plugins-base, gtk3, dconf,
 
diff --git a/pkgs/development/libraries/qt-5/5.6/default.nix b/pkgs/development/libraries/qt-5/5.6/default.nix
index b9ed5eddd5cf..8732b1061342 100644
--- a/pkgs/development/libraries/qt-5/5.6/default.nix
+++ b/pkgs/development/libraries/qt-5/5.6/default.nix
@@ -26,7 +26,7 @@ existing packages here and modify it as necessary.
 
 {
   newScope,
-  stdenv, fetchurl, makeSetupHook, makeWrapper,
+  stdenv, fetchurl, makeSetupHook,
   bison, cups ? null, harfbuzz, libGL, perl,
   gstreamer, gst-plugins-base,
 
diff --git a/pkgs/development/libraries/qt-5/5.9/default.nix b/pkgs/development/libraries/qt-5/5.9/default.nix
index e109fe447aa2..755e6a9487e7 100644
--- a/pkgs/development/libraries/qt-5/5.9/default.nix
+++ b/pkgs/development/libraries/qt-5/5.9/default.nix
@@ -17,7 +17,7 @@ top-level attribute to `top-level/all-packages.nix`.
 
 {
   newScope,
-  stdenv, fetchurl, makeSetupHook, makeWrapper,
+  stdenv, fetchurl, makeSetupHook,
   bison, cups ? null, harfbuzz, libGL, perl,
   gstreamer, gst-plugins-base, gtk3, dconf,
 
diff --git a/pkgs/development/libraries/qt-5/modules/qtbase.nix b/pkgs/development/libraries/qt-5/modules/qtbase.nix
index 15e19c77567a..0d9cb81afda9 100644
--- a/pkgs/development/libraries/qt-5/modules/qtbase.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtbase.nix
@@ -3,14 +3,14 @@
   src, patches, version, qtCompatVersion,
 
   coreutils, bison, flex, gdb, gperf, lndir, patchelf, perl, pkgconfig, python2,
-  ruby, which,
+  which,
   # darwin support
-  darwin, libiconv, libcxx,
+  darwin, libiconv,
 
   dbus, fontconfig, freetype, glib, harfbuzz, icu, libX11, libXcomposite,
   libXcursor, libXext, libXi, libXrender, libinput, libjpeg, libpng, libtiff,
   libxcb, libxkbcommon, libxml2, libxslt, openssl, pcre16, pcre2, sqlite, udev,
-  xcbutil, xcbutilimage, xcbutilkeysyms, xcbutilrenderutil, xcbutilwm, xorg,
+  xcbutil, xcbutilimage, xcbutilkeysyms, xcbutilrenderutil, xcbutilwm,
   zlib,
 
   # optional dependencies
diff --git a/pkgs/development/libraries/qt-5/modules/qtmultimedia.nix b/pkgs/development/libraries/qt-5/modules/qtmultimedia.nix
index 1b7a7c1fceaa..d0bab88b2f21 100644
--- a/pkgs/development/libraries/qt-5/modules/qtmultimedia.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtmultimedia.nix
@@ -1,6 +1,5 @@
 { qtModule, stdenv, qtbase, qtdeclarative, pkgconfig
 , alsaLib, gstreamer, gst-plugins-base, libpulseaudio
-, darwin
 }:
 
 with stdenv.lib;
diff --git a/pkgs/development/libraries/qt-5/modules/qtserialport.nix b/pkgs/development/libraries/qt-5/modules/qtserialport.nix
index 2f8c142323d2..516d38340dc5 100644
--- a/pkgs/development/libraries/qt-5/modules/qtserialport.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtserialport.nix
@@ -1,4 +1,4 @@
-{ qtModule, stdenv, lib, qtbase, substituteAll, systemd }:
+{ qtModule, stdenv, lib, qtbase, systemd }:
 
 let inherit (lib) getLib optional; in
 
diff --git a/pkgs/development/libraries/qt-5/modules/qtwebkit.nix b/pkgs/development/libraries/qt-5/modules/qtwebkit.nix
index 8691e20ec452..62da679157f0 100644
--- a/pkgs/development/libraries/qt-5/modules/qtwebkit.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtwebkit.nix
@@ -4,7 +4,6 @@
 , sqlite, systemd, glib, gst_all_1, cmake
 , bison2, flex, gdb, gperf, perl, pkgconfig, python2, ruby
 , darwin
-, substituteAll
 , flashplayerFix ? false
 , src ? null
 , version ? null
diff --git a/pkgs/development/libraries/qt-5/qt-env.nix b/pkgs/development/libraries/qt-5/qt-env.nix
index 49585f601d14..da56c07779b9 100644
--- a/pkgs/development/libraries/qt-5/qt-env.nix
+++ b/pkgs/development/libraries/qt-5/qt-env.nix
@@ -1,4 +1,4 @@
-{ lib, buildEnv, qtbase }: name: paths:
+{ buildEnv, qtbase }: name: paths:
 
 buildEnv {
   inherit name;
diff --git a/pkgs/development/libraries/qtstyleplugins/default.nix b/pkgs/development/libraries/qtstyleplugins/default.nix
index a8611b312405..b94cdd22f7f0 100644
--- a/pkgs/development/libraries/qtstyleplugins/default.nix
+++ b/pkgs/development/libraries/qtstyleplugins/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, qmake, qtbase, pkgconfig, gtk2 }:
+{ stdenv, fetchFromGitHub, qmake, pkgconfig, gtk2 }:
 
 stdenv.mkDerivation rec {
   name = "qtstyleplugins-2017-03-11";
diff --git a/pkgs/development/libraries/quazip/default.nix b/pkgs/development/libraries/quazip/default.nix
index 8d096e18f08f..ae858738ec16 100644
--- a/pkgs/development/libraries/quazip/default.nix
+++ b/pkgs/development/libraries/quazip/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, zip, zlib, qtbase, qmake }:
+{ fetchurl, stdenv, zlib, qtbase, qmake }:
 
 stdenv.mkDerivation rec {
   name = "quazip-0.7.3";
diff --git a/pkgs/development/libraries/quickder/default.nix b/pkgs/development/libraries/quickder/default.nix
index 77e76ad638ab..35d16ee5e19b 100644
--- a/pkgs/development/libraries/quickder/default.nix
+++ b/pkgs/development/libraries/quickder/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchurl, python2Packages, hexio
+{ stdenv, fetchFromGitHub, python2Packages, hexio
 , which, cmake, bash, arpa2cm, git, asn2quickder, pkgconfig }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/rocksdb/default.nix b/pkgs/development/libraries/rocksdb/default.nix
index 90389055a415..786fce0fb638 100644
--- a/pkgs/development/libraries/rocksdb/default.nix
+++ b/pkgs/development/libraries/rocksdb/default.nix
@@ -5,7 +5,6 @@
 
 # Optional Arguments
 , snappy ? null, google-gflags ? null, zlib ? null, bzip2 ? null, lz4 ? null
-, numactl ? null
 
 # Malloc implementation
 , jemalloc ? null, gperftools ? null
diff --git a/pkgs/development/libraries/science/math/arpack/default.nix b/pkgs/development/libraries/science/math/arpack/default.nix
index 77cb7cf1f2b6..55c1a641fc3d 100644
--- a/pkgs/development/libraries/science/math/arpack/default.nix
+++ b/pkgs/development/libraries/science/math/arpack/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, copyPathsToStore, fetchurl, autoconf, automake, gettext, libtool
+{ stdenv, fetchurl, autoconf, automake, gettext, libtool
 , gfortran, openblas }:
 
 with stdenv.lib;
diff --git a/pkgs/development/libraries/science/math/caffe2/default.nix b/pkgs/development/libraries/science/math/caffe2/default.nix
index 916bf122b3c2..c1994533b78d 100644
--- a/pkgs/development/libraries/science/math/caffe2/default.nix
+++ b/pkgs/development/libraries/science/math/caffe2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, config, fetchFromGitHub, fetchpatch
+{ stdenv, lib, config, fetchFromGitHub
 , cmake
 , glog, google-gflags, gtest
 , protobuf, snappy
diff --git a/pkgs/development/libraries/science/math/openblas/default.nix b/pkgs/development/libraries/science/math/openblas/default.nix
index fc8f11f2f11e..a9aa528a8409 100644
--- a/pkgs/development/libraries/science/math/openblas/default.nix
+++ b/pkgs/development/libraries/science/math/openblas/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, gfortran, perl, which, config, coreutils
+{ stdenv, fetchurl, gfortran, perl, which, coreutils
 # Most packages depending on openblas expect integer width to match
 # pointer width, but some expect to use 32-bit integers always
 # (for compatibility with reference BLAS).
diff --git a/pkgs/development/libraries/science/networking/ns3/default.nix b/pkgs/development/libraries/science/networking/ns3/default.nix
index 3601066cb22f..632380328db1 100644
--- a/pkgs/development/libraries/science/networking/ns3/default.nix
+++ b/pkgs/development/libraries/science/networking/ns3/default.nix
@@ -1,5 +1,5 @@
 { stdenv
-, fetchFromGitHub, fetchurl
+, fetchFromGitHub
 , python
 
 # for binding generation
diff --git a/pkgs/development/libraries/serf/default.nix b/pkgs/development/libraries/serf/default.nix
index dfaf1c679dd7..f794c3841b93 100644
--- a/pkgs/development/libraries/serf/default.nix
+++ b/pkgs/development/libraries/serf/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, apr, scons, openssl, aprutil, zlib, kerberos
-, pkgconfig, gnused, expat, openldap, libiconv }:
+, pkgconfig, libiconv }:
 
 stdenv.mkDerivation rec {
   name = "serf-1.3.9";
diff --git a/pkgs/development/libraries/smpeg2/default.nix b/pkgs/development/libraries/smpeg2/default.nix
index 3207bdb3a7f2..900437864717 100644
--- a/pkgs/development/libraries/smpeg2/default.nix
+++ b/pkgs/development/libraries/smpeg2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, darwin, fetchsvn, autoconf, automake, libtool, m4, pkgconfig, makeWrapper, SDL2 }:
+{ stdenv, darwin, fetchsvn, autoconf, automake, pkgconfig, makeWrapper, SDL2 }:
 
 stdenv.mkDerivation rec {
   name = "smpeg2-svn${version}";
diff --git a/pkgs/development/libraries/speech-tools/default.nix b/pkgs/development/libraries/speech-tools/default.nix
index 22d66b7e71d1..771ad033ed91 100644
--- a/pkgs/development/libraries/speech-tools/default.nix
+++ b/pkgs/development/libraries/speech-tools/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, gawk, alsaLib, ncurses }:
+{ stdenv, fetchurl, alsaLib, ncurses }:
 
 stdenv.mkDerivation rec {
   name = "speech_tools-${version}.0";
diff --git a/pkgs/development/libraries/spice/default.nix b/pkgs/development/libraries/spice/default.nix
index 0b815f9095f9..ba3791a8a8bd 100644
--- a/pkgs/development/libraries/spice/default.nix
+++ b/pkgs/development/libraries/spice/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, pkgconfig, pixman, celt, alsaLib
+{ stdenv, fetchurl, pkgconfig, pixman, celt, alsaLib
 , openssl, libXrandr, libXfixes, libXext, libXrender, libXinerama
 , libjpeg, zlib, spice-protocol, python, pyparsing, glib, cyrus_sasl
 , lz4 }:
diff --git a/pkgs/development/libraries/tachyon/default.nix b/pkgs/development/libraries/tachyon/default.nix
index 0185bd2733b4..4f711a639f73 100644
--- a/pkgs/development/libraries/tachyon/default.nix
+++ b/pkgs/development/libraries/tachyon/default.nix
@@ -1,6 +1,5 @@
 { stdenv
 , fetchurl
-, fetchpatch
 , Carbon ? null
 , libjpeg ? null
 , libpng ? null
diff --git a/pkgs/development/libraries/ti-rpc/default.nix b/pkgs/development/libraries/ti-rpc/default.nix
index 99f0bb65441c..24251cf0cc1d 100644
--- a/pkgs/development/libraries/ti-rpc/default.nix
+++ b/pkgs/development/libraries/ti-rpc/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, fetchpatch, stdenv, autoreconfHook, libkrb5 }:
+{ fetchurl, stdenv, autoreconfHook, libkrb5 }:
 
 stdenv.mkDerivation rec {
   name = "libtirpc-1.0.3";
diff --git a/pkgs/development/libraries/unicorn-emu/default.nix b/pkgs/development/libraries/unicorn-emu/default.nix
index 9f9d8e62de50..aa4a7890b23e 100644
--- a/pkgs/development/libraries/unicorn-emu/default.nix
+++ b/pkgs/development/libraries/unicorn-emu/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, bash, pkgconfig, python }:
+{ stdenv, fetchurl, pkgconfig, python }:
 
 stdenv.mkDerivation rec {
   name    = "unicorn-emulator-${version}";
diff --git a/pkgs/development/libraries/v8/3.14.nix b/pkgs/development/libraries/v8/3.14.nix
index 9112079a90ea..ce666becc855 100644
--- a/pkgs/development/libraries/v8/3.14.nix
+++ b/pkgs/development/libraries/v8/3.14.nix
@@ -1,5 +1,5 @@
 # This old version of V8 is still needed for the R V8 module
-{ stdenv, callPackage, fetchFromGitHub, gyp, readline, python, which, icu, ... }:
+{ stdenv, fetchFromGitHub, gyp, readline, python, which, icu, ... }:
 
 assert readline != null;
 
diff --git a/pkgs/development/libraries/vigra/default.nix b/pkgs/development/libraries/vigra/default.nix
index 438b4eda454b..14211ea65e9a 100644
--- a/pkgs/development/libraries/vigra/default.nix
+++ b/pkgs/development/libraries/vigra/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, boost, cmake, doxygen, fftw, fftwSinglePrec, hdf5, ilmbase
+{ stdenv, fetchurl, boost, cmake, fftw, fftwSinglePrec, hdf5, ilmbase
 , libjpeg, libpng, libtiff, openexr, python2Packages }:
 
 let
diff --git a/pkgs/development/libraries/vtk/default.nix b/pkgs/development/libraries/vtk/default.nix
index 984a106236ce..bdfe3d1c5c60 100644
--- a/pkgs/development/libraries/vtk/default.nix
+++ b/pkgs/development/libraries/vtk/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, cmake, libGLU_combined, libX11, xproto, libXt
+{ stdenv, fetchurl, cmake, libGLU_combined, libX11, xproto, libXt
 , qtLib ? null
 # Darwin support
 , Cocoa, CoreServices, DiskArbitration, IOKit, CFNetwork, Security, GLUT, OpenGL
diff --git a/pkgs/development/libraries/wavpack/default.nix b/pkgs/development/libraries/wavpack/default.nix
index 29a27e53f225..9eb3254001d5 100644
--- a/pkgs/development/libraries/wavpack/default.nix
+++ b/pkgs/development/libraries/wavpack/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, libiconv }:
+{ stdenv, fetchurl, libiconv }:
 
 stdenv.mkDerivation rec {
   name = "wavpack-${version}";
diff --git a/pkgs/development/libraries/wayland/1.9.nix b/pkgs/development/libraries/wayland/1.9.nix
index d832becbed88..3555a9232285 100644
--- a/pkgs/development/libraries/wayland/1.9.nix
+++ b/pkgs/development/libraries/wayland/1.9.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, fetchurl, pkgconfig
-, libffi, docbook_xsl, doxygen, graphviz, libxslt, xmlto, libxml2
+, libffi, libxml2
 , expat ? null # Build wayland-scanner (currently cannot be disabled as of 1.7.0)
 }:
 
diff --git a/pkgs/development/libraries/wayland/default.nix b/pkgs/development/libraries/wayland/default.nix
index bbc33f33e701..fce0dae6c731 100644
--- a/pkgs/development/libraries/wayland/default.nix
+++ b/pkgs/development/libraries/wayland/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, fetchurl, pkgconfig
-, libffi, docbook_xsl, doxygen, graphviz, libxslt, xmlto, libxml2
+, libffi, libxml2
 , expat ? null # Build wayland-scanner (currently cannot be disabled as of 1.7.0)
 }:
 
diff --git a/pkgs/development/libraries/wlc/default.nix b/pkgs/development/libraries/wlc/default.nix
index 2b9244ff1b18..572adfeb0bb6 100644
--- a/pkgs/development/libraries/wlc/default.nix
+++ b/pkgs/development/libraries/wlc/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, cmake, pkgconfig
+{ stdenv, fetchFromGitHub, cmake, pkgconfig
 , wayland, pixman, libxkbcommon, libinput, xcbutilwm, xcbutilimage, libGL
 , libX11, dbus, wayland-protocols, libdrm, mesa_noglu
 , libpthreadstubs, libXdmcp, libXext, libXfixes
diff --git a/pkgs/development/libraries/xcb-util-cursor/HEAD.nix b/pkgs/development/libraries/xcb-util-cursor/HEAD.nix
index 17f8646b5177..e343c301127f 100644
--- a/pkgs/development/libraries/xcb-util-cursor/HEAD.nix
+++ b/pkgs/development/libraries/xcb-util-cursor/HEAD.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchgit, autoconf, automake, libtool, pkgconfig
-, git, xorg, gnum4, libxcb, gperf }:
+, xorg, gnum4, libxcb, gperf }:
 
 stdenv.mkDerivation rec {
   name = "xcb-util-cursor-0.1.1-3-unstable-${version}";
diff --git a/pkgs/development/libraries/xgboost/default.nix b/pkgs/development/libraries/xgboost/default.nix
index 7865724efa40..63dee2529fe2 100644
--- a/pkgs/development/libraries/xgboost/default.nix
+++ b/pkgs/development/libraries/xgboost/default.nix
@@ -1,5 +1,4 @@
 { stdenv, lib, fetchgit, cmake
-, avxSupport ? false
 , cudaSupport ? false, cudatoolkit
 , ncclSupport ? false, nccl
 , llvmPackages
diff --git a/pkgs/development/libraries/xine-lib/default.nix b/pkgs/development/libraries/xine-lib/default.nix
index 274a70057bdd..69b5b95e7613 100644
--- a/pkgs/development/libraries/xine-lib/default.nix
+++ b/pkgs/development/libraries/xine-lib/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, pkgconfig, xorg, alsaLib, libGLU_combined, aalib
-, libvorbis, libtheora, speex, zlib, libdvdcss, perl, ffmpeg
+, libvorbis, libtheora, speex, zlib, perl, ffmpeg
 , flac, libcaca, libpulseaudio, libmng, libcdio, libv4l, vcdimager
 , libmpcdec
 }:
diff --git a/pkgs/development/lisp-modules/clwrapper/default.nix b/pkgs/development/lisp-modules/clwrapper/default.nix
index c834ab7a305b..019a44482b9a 100644
--- a/pkgs/development/lisp-modules/clwrapper/default.nix
+++ b/pkgs/development/lisp-modules/clwrapper/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, asdf, which, bash, lisp ? null}:
+{stdenv, asdf, which, bash, lisp ? null}:
 stdenv.mkDerivation {
   name = "cl-wrapper-script";
 
diff --git a/pkgs/development/lisp-modules/quicklisp-to-nix-overrides.nix b/pkgs/development/lisp-modules/quicklisp-to-nix-overrides.nix
index 1dc2488f55a2..91493d7431e8 100644
--- a/pkgs/development/lisp-modules/quicklisp-to-nix-overrides.nix
+++ b/pkgs/development/lisp-modules/quicklisp-to-nix-overrides.nix
@@ -1,4 +1,4 @@
-{pkgs, buildLispPackage, clwrapper, quicklisp-to-nix-packages}:
+{pkgs, quicklisp-to-nix-packages}:
 let
   addNativeLibs = libs: x: { propagatedBuildInputs = libs; };
   skipBuildPhase = x: {
diff --git a/pkgs/development/misc/loc/default.nix b/pkgs/development/misc/loc/default.nix
index efa76ea00a0e..b43deeceb867 100644
--- a/pkgs/development/misc/loc/default.nix
+++ b/pkgs/development/misc/loc/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, rustPlatform, makeWrapper }:
+{ stdenv, fetchFromGitHub, rustPlatform }:
 
 with rustPlatform;
 
diff --git a/pkgs/development/mobile/titaniumenv/default.nix b/pkgs/development/mobile/titaniumenv/default.nix
index 6765a9cc5c30..b09a483290f7 100644
--- a/pkgs/development/mobile/titaniumenv/default.nix
+++ b/pkgs/development/mobile/titaniumenv/default.nix
@@ -1,4 +1,4 @@
-{pkgs, pkgs_i686, xcodeVersion ? "9.2", xcodeBaseDir ? "/Applications/Xcode.app", tiVersion ? "7.1.0.GA"}:
+{pkgs, xcodeVersion ? "9.2", xcodeBaseDir ? "/Applications/Xcode.app", tiVersion ? "7.1.0.GA"}:
 
 rec {
   androidenv = pkgs.androidenv;
diff --git a/pkgs/development/mobile/titaniumenv/examples/simulate-kitchensink/default.nix b/pkgs/development/mobile/titaniumenv/examples/simulate-kitchensink/default.nix
index 5bdd0fd63c5a..bbd94cb7882a 100644
--- a/pkgs/development/mobile/titaniumenv/examples/simulate-kitchensink/default.nix
+++ b/pkgs/development/mobile/titaniumenv/examples/simulate-kitchensink/default.nix
@@ -1,4 +1,4 @@
-{stdenv, xcodeenv, kitchensink, bundleId}:
+{xcodeenv, kitchensink, bundleId}:
 
 xcodeenv.simulateApp {
   name = "simulate-${kitchensink.name}";
diff --git a/pkgs/development/mobile/titaniumenv/titaniumsdk-6.3.nix b/pkgs/development/mobile/titaniumenv/titaniumsdk-6.3.nix
index 53963c100c74..26adf373826e 100644
--- a/pkgs/development/mobile/titaniumenv/titaniumsdk-6.3.nix
+++ b/pkgs/development/mobile/titaniumenv/titaniumsdk-6.3.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, unzip, makeWrapper, python, jdk}:
+{stdenv, fetchurl, unzip, makeWrapper}:
 
 stdenv.mkDerivation {
   name = "mobilesdk-6.3.1.GA";
diff --git a/pkgs/development/mobile/titaniumenv/titaniumsdk-7.1.nix b/pkgs/development/mobile/titaniumenv/titaniumsdk-7.1.nix
index 61c23a6d0b37..a6de1f0ae8c6 100644
--- a/pkgs/development/mobile/titaniumenv/titaniumsdk-7.1.nix
+++ b/pkgs/development/mobile/titaniumenv/titaniumsdk-7.1.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, unzip, makeWrapper, python, jdk}:
+{stdenv, fetchurl, unzip, makeWrapper}:
 
 let
   # Gradle is a build system that bootstraps itself. This is what it actually
diff --git a/pkgs/development/ocaml-modules/atdgen/default.nix b/pkgs/development/ocaml-modules/atdgen/default.nix
index bab2541fd744..291dd03c8d11 100644
--- a/pkgs/development/ocaml-modules/atdgen/default.nix
+++ b/pkgs/development/ocaml-modules/atdgen/default.nix
@@ -1,4 +1,4 @@
-{stdenv, atd, yojson, menhir, easy-format, biniou, cppo, buildOcaml, fetchurl, which}:
+{stdenv, atd, yojson, biniou, buildOcaml, fetchurl, which}:
 
 buildOcaml rec {
   name = "atdgen";
diff --git a/pkgs/development/ocaml-modules/bap/default.nix b/pkgs/development/ocaml-modules/bap/default.nix
index 8882bbf66474..72c426ce0372 100644
--- a/pkgs/development/ocaml-modules/bap/default.nix
+++ b/pkgs/development/ocaml-modules/bap/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchFromGitHub, fetchurl, fetchpatch
 , ocaml, findlib, ocamlbuild, ocaml_oasis,
- bitstring, camlzip, cmdliner, core_kernel, ezjsonm, faillib, fileutils, ocaml_lwt, ocamlgraph, ocurl, re, uri, zarith, piqi, piqi-ocaml, uuidm, llvm_38, ulex, easy-format, xmlm, frontc, ounit, ppx_jane, parsexp,
+ bitstring, camlzip, cmdliner, core_kernel, ezjsonm, faillib, fileutils, ocaml_lwt, ocamlgraph, ocurl, re, uri, zarith, piqi, piqi-ocaml, uuidm, llvm_38, frontc, ounit, ppx_jane, parsexp,
  utop,
  which, makeWrapper, writeText
 }:
diff --git a/pkgs/development/ocaml-modules/bin_prot/default.nix b/pkgs/development/ocaml-modules/bin_prot/default.nix
index 4a2b9846271b..1acb17a8f7a3 100644
--- a/pkgs/development/ocaml-modules/bin_prot/default.nix
+++ b/pkgs/development/ocaml-modules/bin_prot/default.nix
@@ -1,4 +1,4 @@
-{stdenv, writeText, buildOcaml, fetchurl, type_conv}:
+{stdenv, buildOcaml, fetchurl, type_conv}:
 
 buildOcaml rec {
   name = "bin_prot";
diff --git a/pkgs/development/ocaml-modules/cohttp/default.nix b/pkgs/development/ocaml-modules/cohttp/default.nix
index 24f0e9bfd7a5..962525b47e42 100644
--- a/pkgs/development/ocaml-modules/cohttp/default.nix
+++ b/pkgs/development/ocaml-modules/cohttp/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchFromGitHub, ocaml, findlib, jbuilder
 , ppx_fields_conv, ppx_sexp_conv, ppx_deriving
-, base64, fieldslib, jsonm, logs, re, stringext, uri
+, base64, fieldslib, jsonm, re, stringext, uri
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/ocaml-modules/cstruct/1.9.0.nix b/pkgs/development/ocaml-modules/cstruct/1.9.0.nix
index 25f84826ec18..0122ec9ff61d 100644
--- a/pkgs/development/ocaml-modules/cstruct/1.9.0.nix
+++ b/pkgs/development/ocaml-modules/cstruct/1.9.0.nix
@@ -1,4 +1,4 @@
-{ stdenv, writeText, fetchFromGitHub, ocaml, ocamlbuild, ocplib-endian, sexplib, findlib, ppx_tools
+{ stdenv, fetchFromGitHub, ocaml, ocamlbuild, ocplib-endian, sexplib, findlib, ppx_tools
 , async ? null, lwt ? null
 }:
 
diff --git a/pkgs/development/ocaml-modules/eliom/default.nix b/pkgs/development/ocaml-modules/eliom/default.nix
index 8b304aadd9ef..f82cf33e3079 100644
--- a/pkgs/development/ocaml-modules/eliom/default.nix
+++ b/pkgs/development/ocaml-modules/eliom/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, which, ocsigen_server, ocsigen_deriving, ocaml, camlp4,
-  js_of_ocaml, lwt_react, cryptokit,
+  lwt_react, cryptokit,
   ipaddr, ocamlnet, lwt_ssl, ocaml_pcre,
   opaline, ppx_tools, ppx_deriving, findlib
 , js_of_ocaml-ocamlbuild, js_of_ocaml-ppx, js_of_ocaml-ppx_deriving_json
diff --git a/pkgs/development/ocaml-modules/erm_xmpp/0.3.nix b/pkgs/development/ocaml-modules/erm_xmpp/0.3.nix
index a7290c8bb98f..1a8f854185a2 100644
--- a/pkgs/development/ocaml-modules/erm_xmpp/0.3.nix
+++ b/pkgs/development/ocaml-modules/erm_xmpp/0.3.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildOcaml, fetchFromGitHub, fetchurl, ocaml, findlib, erm_xml, nocrypto }:
+{ stdenv, buildOcaml, fetchFromGitHub, ocaml, findlib, erm_xml, nocrypto }:
 
 buildOcaml rec {
   version = "0.3";
diff --git a/pkgs/development/ocaml-modules/git-unix/default.nix b/pkgs/development/ocaml-modules/git-unix/default.nix
index 189388efe324..afeb3f1957b0 100644
--- a/pkgs/development/ocaml-modules/git-unix/default.nix
+++ b/pkgs/development/ocaml-modules/git-unix/default.nix
@@ -1,6 +1,6 @@
 { stdenv, ocaml, findlib, jbuilder, git-http
 , cohttp-lwt-unix
-, tls, magic-mime, cmdliner, mtime
+, tls, cmdliner, mtime
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/ocaml-modules/git/default.nix b/pkgs/development/ocaml-modules/git/default.nix
index 6f0f0d0b120b..0bf43174412c 100644
--- a/pkgs/development/ocaml-modules/git/default.nix
+++ b/pkgs/development/ocaml-modules/git/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, ocaml, findlib, jbuilder, opam
+{ stdenv, fetchFromGitHub, ocaml, findlib, jbuilder
 , astring, decompress, fmt, hex, logs, mstruct, ocaml_lwt, ocamlgraph, uri
 , alcotest, mtime, nocrypto
 }:
diff --git a/pkgs/development/ocaml-modules/janestreet/async-extra.nix b/pkgs/development/ocaml-modules/janestreet/async-extra.nix
index 4a283cc9910b..19eef7cf1825 100644
--- a/pkgs/development/ocaml-modules/janestreet/async-extra.nix
+++ b/pkgs/development/ocaml-modules/janestreet/async-extra.nix
@@ -1,4 +1,4 @@
-{stdenv, buildOcamlJane, fetchurl, async_kernel, async_unix,
+{stdenv, buildOcamlJane, async_kernel, async_unix,
  bin_prot, core, ppx_custom_printf, fieldslib, herelib,
  pipebang, sexplib, async_rpc_kernel}:
 
diff --git a/pkgs/development/ocaml-modules/janestreet/async-kernel.nix b/pkgs/development/ocaml-modules/janestreet/async-kernel.nix
index 4d7213a8603e..938f5ccf4474 100644
--- a/pkgs/development/ocaml-modules/janestreet/async-kernel.nix
+++ b/pkgs/development/ocaml-modules/janestreet/async-kernel.nix
@@ -1,6 +1,6 @@
-{stdenv, buildOcamlJane, fetchurl, core_kernel,
+{stdenv, buildOcamlJane, core_kernel,
  bin_prot, fieldslib,
- sexplib, herelib, opam, js_build_tools, ocaml_oasis}:
+ sexplib, herelib}:
 
 buildOcamlJane rec {
   name = "async_kernel";
diff --git a/pkgs/development/ocaml-modules/janestreet/async-unix.nix b/pkgs/development/ocaml-modules/janestreet/async-unix.nix
index 5621d2ec704b..7db7cae27096 100644
--- a/pkgs/development/ocaml-modules/janestreet/async-unix.nix
+++ b/pkgs/development/ocaml-modules/janestreet/async-unix.nix
@@ -1,4 +1,4 @@
-{stdenv, buildOcamlJane, fetchurl, async_kernel,
+{stdenv, buildOcamlJane, async_kernel,
  bin_prot, comparelib, core, fieldslib, herelib,
  pipebang, sexplib}:
 
diff --git a/pkgs/development/ocaml-modules/janestreet/async.nix b/pkgs/development/ocaml-modules/janestreet/async.nix
index 2e776e273be1..4cd67e1af86b 100644
--- a/pkgs/development/ocaml-modules/janestreet/async.nix
+++ b/pkgs/development/ocaml-modules/janestreet/async.nix
@@ -1,4 +1,4 @@
-{stdenv, buildOcamlJane, fetchurl, async_kernel,
+{stdenv, buildOcamlJane, async_kernel,
  async_unix, async_extra}:
 
 buildOcamlJane rec {
diff --git a/pkgs/development/ocaml-modules/janestreet/async_ssl.nix b/pkgs/development/ocaml-modules/janestreet/async_ssl.nix
index bc1977ce2d69..631562159762 100644
--- a/pkgs/development/ocaml-modules/janestreet/async_ssl.nix
+++ b/pkgs/development/ocaml-modules/janestreet/async_ssl.nix
@@ -1,5 +1,5 @@
-{ stdenv, ocaml, buildOcamlJane, fetchurl, async, comparelib, core, ctypes
-, openssl, fieldslib, herelib, pipebang, sexplib, ocaml_oasis, integers
+{ stdenv, buildOcamlJane, async, comparelib, core, ctypes
+, openssl, fieldslib, herelib, pipebang, sexplib, ocaml_oasis
 }:
 
 buildOcamlJane rec {
diff --git a/pkgs/development/ocaml-modules/janestreet/core-extended.nix b/pkgs/development/ocaml-modules/janestreet/core-extended.nix
index dc84ea34337e..5410167e0a26 100644
--- a/pkgs/development/ocaml-modules/janestreet/core-extended.nix
+++ b/pkgs/development/ocaml-modules/janestreet/core-extended.nix
@@ -1,9 +1,8 @@
-{stdenv, buildOcamlJane, fetchurl,
+{stdenv, buildOcamlJane,
  core,
  bin_prot, fieldslib, sexplib, typerep, variantslib,
  ppx_assert, ppx_bench, ppx_driver, ppx_expect, ppx_inline_test, ppx_jane,
- re2, textutils,
- ocaml_oasis, opam, js_build_tools}:
+ re2, textutils}:
 
 buildOcamlJane rec {
   name = "core_extended";
diff --git a/pkgs/development/ocaml-modules/janestreet/core.nix b/pkgs/development/ocaml-modules/janestreet/core.nix
index 05ea4d5d566b..c2f97badda93 100644
--- a/pkgs/development/ocaml-modules/janestreet/core.nix
+++ b/pkgs/development/ocaml-modules/janestreet/core.nix
@@ -1,8 +1,7 @@
-{stdenv, buildOcamlJane, fetchurl,
+{stdenv, buildOcamlJane,
  core_kernel,
  bin_prot, fieldslib, sexplib, typerep, variantslib,
- ppx_assert, ppx_bench, ppx_driver, ppx_expect, ppx_inline_test, ppx_jane,
- ocaml_oasis, opam, js_build_tools}:
+ ppx_assert, ppx_bench, ppx_driver, ppx_expect, ppx_inline_test, ppx_jane}:
 
 buildOcamlJane rec {
   name = "core";
diff --git a/pkgs/development/ocaml-modules/janestreet/core_kernel.nix b/pkgs/development/ocaml-modules/janestreet/core_kernel.nix
index 93fcdde5bb38..e5bbb7800520 100644
--- a/pkgs/development/ocaml-modules/janestreet/core_kernel.nix
+++ b/pkgs/development/ocaml-modules/janestreet/core_kernel.nix
@@ -1,7 +1,6 @@
-{stdenv, buildOcamlJane, fetchurl,
+{stdenv, buildOcamlJane,
  bin_prot, fieldslib, sexplib, typerep, variantslib,
- ppx_assert, ppx_bench, ppx_driver, ppx_expect, ppx_inline_test, ppx_jane,
- ocaml_oasis, opam, js_build_tools}:
+ ppx_assert, ppx_bench, ppx_driver, ppx_expect, ppx_inline_test, ppx_jane}:
 
 buildOcamlJane rec {
   name = "core_kernel";
diff --git a/pkgs/development/ocaml-modules/janestreet/default.nix b/pkgs/development/ocaml-modules/janestreet/default.nix
index a4c3c15160d1..a05d49245b25 100644
--- a/pkgs/development/ocaml-modules/janestreet/default.nix
+++ b/pkgs/development/ocaml-modules/janestreet/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, janePackage, ocaml, ocamlbuild, angstrom, cryptokit, ctypes,
+{ stdenv, janePackage, ocamlbuild, angstrom, cryptokit, ctypes,
   magic-mime, ocaml-migrate-parsetree, octavius, ounit, ppx_deriving, re,
   zarith, num, openssl
 , ppxlib
diff --git a/pkgs/development/ocaml-modules/mysql/default.nix b/pkgs/development/ocaml-modules/mysql/default.nix
index 5482d7ac87cd..1986f7e48f69 100644
--- a/pkgs/development/ocaml-modules/mysql/default.nix
+++ b/pkgs/development/ocaml-modules/mysql/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, ocaml, findlib, mysql, openssl }:
+{ stdenv, fetchurl, fetchpatch, ocaml, findlib, mysql }:
 
 # TODO: la versione stabile da' un errore di compilazione dovuto a
 # qualche cambiamento negli header .h
diff --git a/pkgs/development/ocaml-modules/ocaml-cairo/default.nix b/pkgs/development/ocaml-modules/ocaml-cairo/default.nix
index 165dda1fa027..e1590bb0c9ae 100644
--- a/pkgs/development/ocaml-modules/ocaml-cairo/default.nix
+++ b/pkgs/development/ocaml-modules/ocaml-cairo/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, automake, ocaml, autoconf, gnum4, pkgconfig, freetype, lablgtk, unzip, cairo, findlib, gdk_pixbuf, glib, gtk2, pango }:
+{stdenv, fetchurl, automake, ocaml, autoconf, gnum4, pkgconfig, freetype, lablgtk, unzip, cairo, findlib, gdk_pixbuf, gtk2, pango }:
 
 let
   pname = "ocaml-cairo";
diff --git a/pkgs/development/ocaml-modules/piqi-ocaml/default.nix b/pkgs/development/ocaml-modules/piqi-ocaml/default.nix
index 165a566b1b71..38b56ac7beb1 100644
--- a/pkgs/development/ocaml-modules/piqi-ocaml/default.nix
+++ b/pkgs/development/ocaml-modules/piqi-ocaml/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, ocaml, findlib, piqi, ulex, easy-format, xmlm, camlp4 }:
+{ stdenv, fetchurl, ocaml, findlib, piqi, camlp4 }:
 
 stdenv.mkDerivation rec {
   version = "0.7.5";
diff --git a/pkgs/development/ocaml-modules/ppx_import/default.nix b/pkgs/development/ocaml-modules/ppx_import/default.nix
index 3948cfce0e8e..1f53b8712828 100644
--- a/pkgs/development/ocaml-modules/ppx_import/default.nix
+++ b/pkgs/development/ocaml-modules/ppx_import/default.nix
@@ -1,5 +1,5 @@
-{stdenv, fetchFromGitHub, buildOcaml, ocaml, opaline,
- cppo, ppx_tools, ounit, ppx_deriving}:
+{stdenv, fetchFromGitHub, buildOcaml, opaline,
+ cppo, ounit, ppx_deriving}:
 
 buildOcaml rec {
   name = "ppx_import";
diff --git a/pkgs/development/ocaml-modules/re2/default.nix b/pkgs/development/ocaml-modules/re2/default.nix
index 9b26c4040959..2b7d9855665f 100644
--- a/pkgs/development/ocaml-modules/re2/default.nix
+++ b/pkgs/development/ocaml-modules/re2/default.nix
@@ -1,4 +1,4 @@
-{stdenv, buildOcaml, fetchurl, ocaml, core_p4, pa_ounit, pa_test,
+{stdenv, buildOcaml, fetchurl, core_p4, pa_ounit, pa_test,
  bin_prot_p4, comparelib, sexplib_p4, rsync}:
 
 buildOcaml rec {
diff --git a/pkgs/development/ocaml-modules/tls/default.nix b/pkgs/development/ocaml-modules/tls/default.nix
index 1e031b135d29..181946802d70 100644
--- a/pkgs/development/ocaml-modules/tls/default.nix
+++ b/pkgs/development/ocaml-modules/tls/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, ocaml, findlib, ocamlbuild, topkg
-, ppx_tools, ppx_sexp_conv, result, x509, nocrypto, cstruct, ppx_cstruct, cstruct-unix, ounit
+, ppx_sexp_conv, result, x509, nocrypto, cstruct, ppx_cstruct, cstruct-unix, ounit
 , lwt     ? null}:
 
 with stdenv.lib;
diff --git a/pkgs/development/perl-modules/MNI/default.nix b/pkgs/development/perl-modules/MNI/default.nix
index 176cd06a9cc3..dbb167e27b32 100644
--- a/pkgs/development/perl-modules/MNI/default.nix
+++ b/pkgs/development/perl-modules/MNI/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, buildPerlPackage, stdenv, perl }:
+{ fetchFromGitHub, buildPerlPackage, stdenv }:
 
 buildPerlPackage rec {
   name = "MNI-Perllib-2012-04-13";
diff --git a/pkgs/development/pharo/vm/build-vm.nix b/pkgs/development/pharo/vm/build-vm.nix
index 82b3da7a37c4..b59be96bb621 100644
--- a/pkgs/development/pharo/vm/build-vm.nix
+++ b/pkgs/development/pharo/vm/build-vm.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, bash, unzip, glibc, openssl, gcc, libGLU_combined, freetype, xorg, alsaLib, cairo, libuuid, autoreconfHook, gcc48, ... }:
+{ stdenv, fetchurl, bash, unzip, glibc, openssl, libGLU_combined, freetype, xorg, alsaLib, cairo, libuuid, autoreconfHook, gcc48, ... }:
 
 { name, src, version, source-date, source-url, ... }:
 
diff --git a/pkgs/development/pure-modules/gen/default.nix b/pkgs/development/pure-modules/gen/default.nix
index e8c1a948fe92..22bbb4d3be41 100644
--- a/pkgs/development/pure-modules/gen/default.nix
+++ b/pkgs/development/pure-modules/gen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl,
+{ stdenv, fetchurl,
   pkgconfig, pure, haskellPackages }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/pure-modules/glpk/default.nix b/pkgs/development/pure-modules/glpk/default.nix
index e86f08b57ca9..7b615928da9a 100644
--- a/pkgs/development/pure-modules/glpk/default.nix
+++ b/pkgs/development/pure-modules/glpk/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, fetchurl,
-  pkgconfig, pure, glpk, gmp, libtool, mysql, libiodbc, zlib }:
+  pkgconfig, pure, glpk, gmp, libtool, mysql, libiodbc }:
 
 stdenv.mkDerivation rec {
   baseName = "glpk";
diff --git a/pkgs/development/python-modules/Cython/default.nix b/pkgs/development/python-modules/Cython/default.nix
index 124e8b80ba02..fa07eee0d7e1 100644
--- a/pkgs/development/python-modules/Cython/default.nix
+++ b/pkgs/development/python-modules/Cython/default.nix
@@ -2,7 +2,6 @@
 , stdenv
 , buildPythonPackage
 , fetchPypi
-, isPy3k
 , python
 , glibcLocales
 , pkgconfig
diff --git a/pkgs/development/python-modules/GeoIP/default.nix b/pkgs/development/python-modules/GeoIP/default.nix
index 4f0a7d4aebc2..550fa1da3edf 100644
--- a/pkgs/development/python-modules/GeoIP/default.nix
+++ b/pkgs/development/python-modules/GeoIP/default.nix
@@ -1,5 +1,4 @@
-{lib, buildPythonPackage, fetchPypi, isPy3k, incremental, ipaddress, twisted
-, automat, zope_interface, idna, pyopenssl, service-identity, pytest, mock, lsof
+{lib, buildPythonPackage, fetchPypi
 , geoip, nose}:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/JPype1/default.nix b/pkgs/development/python-modules/JPype1/default.nix
index 13bddd3ffb8f..879cdb9bd095 100644
--- a/pkgs/development/python-modules/JPype1/default.nix
+++ b/pkgs/development/python-modules/JPype1/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, isPy3k }:
+{ buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "JPype1";
diff --git a/pkgs/development/python-modules/PyLD/default.nix b/pkgs/development/python-modules/PyLD/default.nix
index 29a792000e99..48878995bb4e 100644
--- a/pkgs/development/python-modules/PyLD/default.nix
+++ b/pkgs/development/python-modules/PyLD/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchPypi, buildPythonPackage, fetchFromGitHub, python, gnugrep }:
+{ stdenv, buildPythonPackage, fetchFromGitHub, python, gnugrep }:
 
 let
 
diff --git a/pkgs/development/python-modules/Theano/default.nix b/pkgs/development/python-modules/Theano/default.nix
index 30c820ec6c19..e2b31cdda794 100644
--- a/pkgs/development/python-modules/Theano/default.nix
+++ b/pkgs/development/python-modules/Theano/default.nix
@@ -9,7 +9,6 @@
 , isPy3k
 , nose
 , numpy
-, pydot_ng
 , scipy
 , six
 , libgpuarray
diff --git a/pkgs/development/python-modules/acme/default.nix b/pkgs/development/python-modules/acme/default.nix
index cd81a7facc22..820ee2a95d81 100644
--- a/pkgs/development/python-modules/acme/default.nix
+++ b/pkgs/development/python-modules/acme/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi
+{ buildPythonPackage
 , certbot
 , nose
 , cryptography
diff --git a/pkgs/development/python-modules/aiohttp-jinja2/default.nix b/pkgs/development/python-modules/aiohttp-jinja2/default.nix
index f0756e1572e7..9f307f24dfaf 100644
--- a/pkgs/development/python-modules/aiohttp-jinja2/default.nix
+++ b/pkgs/development/python-modules/aiohttp-jinja2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, aiohttp, jinja2, pytest, pytest-aiohttp }:
+{ lib, buildPythonPackage, fetchPypi, aiohttp, jinja2, pytest, pytest-aiohttp }:
 
 buildPythonPackage rec {
   pname = "aiohttp-jinja2";
diff --git a/pkgs/development/python-modules/aiohttp/cors.nix b/pkgs/development/python-modules/aiohttp/cors.nix
index 3065bb17c05d..00198cd27cff 100644
--- a/pkgs/development/python-modules/aiohttp/cors.nix
+++ b/pkgs/development/python-modules/aiohttp/cors.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , typing, aiohttp
 }:
 
diff --git a/pkgs/development/python-modules/aiohue/default.nix b/pkgs/development/python-modules/aiohue/default.nix
index 2ad260f5d406..1492a15aadf3 100644
--- a/pkgs/development/python-modules/aiohue/default.nix
+++ b/pkgs/development/python-modules/aiohue/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, aiohttp }:
+{ lib, buildPythonPackage, fetchPypi, aiohttp }:
 
 buildPythonPackage rec {
   pname = "aiohue";
diff --git a/pkgs/development/python-modules/anyjson/default.nix b/pkgs/development/python-modules/anyjson/default.nix
index ba32cf7ea695..6db4bbdc3148 100644
--- a/pkgs/development/python-modules/anyjson/default.nix
+++ b/pkgs/development/python-modules/anyjson/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, isPy3k, nose }:
+{ buildPythonPackage, fetchPypi, isPy3k, nose }:
 
 buildPythonPackage rec {
   pname = "anyjson";
diff --git a/pkgs/development/python-modules/application/default.nix b/pkgs/development/python-modules/application/default.nix
index 32314b81edca..584eb3ae2c52 100644
--- a/pkgs/development/python-modules/application/default.nix
+++ b/pkgs/development/python-modules/application/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchdarcs, zope_interface, isPy3k }:
+{ buildPythonPackage, fetchdarcs, zope_interface, isPy3k }:
 
 buildPythonPackage rec {
   pname = "python-application";
diff --git a/pkgs/development/python-modules/area53/default.nix b/pkgs/development/python-modules/area53/default.nix
index 808ddc57096d..20013b8a1ed4 100644
--- a/pkgs/development/python-modules/area53/default.nix
+++ b/pkgs/development/python-modules/area53/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi
+{ buildPythonPackage, fetchPypi
 , boto }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/argcomplete/default.nix b/pkgs/development/python-modules/argcomplete/default.nix
index 28b88d3b46a0..37d97f42aa1f 100644
--- a/pkgs/development/python-modules/argcomplete/default.nix
+++ b/pkgs/development/python-modules/argcomplete/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage, fetchPypi, lib,
-  coverage, dicttoxml, flake8, pexpect, prettytable, requests_toolbelt
+  dicttoxml, pexpect, prettytable, requests_toolbelt
 }:
 buildPythonPackage rec {
   pname = "argcomplete";
diff --git a/pkgs/development/python-modules/argon2_cffi/default.nix b/pkgs/development/python-modules/argon2_cffi/default.nix
index f46efd9f496e..ce371076256e 100644
--- a/pkgs/development/python-modules/argon2_cffi/default.nix
+++ b/pkgs/development/python-modules/argon2_cffi/default.nix
@@ -1,5 +1,4 @@
-{ lib
-, cffi
+{ cffi
 , six
 , hypothesis
 , pytest
diff --git a/pkgs/development/python-modules/asana/default.nix b/pkgs/development/python-modules/asana/default.nix
index fd89457ed310..2fbe4932beda 100644
--- a/pkgs/development/python-modules/asana/default.nix
+++ b/pkgs/development/python-modules/asana/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, pytest, requests, requests_oauthlib, six
+{ buildPythonPackage, pytest, requests, requests_oauthlib, six
 , fetchFromGitHub, responses, stdenv
 }:
 
diff --git a/pkgs/development/python-modules/async_timeout/default.nix b/pkgs/development/python-modules/async_timeout/default.nix
index bc8e375271d6..ee15be954186 100644
--- a/pkgs/development/python-modules/async_timeout/default.nix
+++ b/pkgs/development/python-modules/async_timeout/default.nix
@@ -1,7 +1,6 @@
 { lib
 , fetchPypi
 , buildPythonPackage
-, pytestrunner
 , pythonOlder
 }:
 
diff --git a/pkgs/development/python-modules/asyncio/default.nix b/pkgs/development/python-modules/asyncio/default.nix
index c3ed7bed7426..489a31b3242c 100644
--- a/pkgs/development/python-modules/asyncio/default.nix
+++ b/pkgs/development/python-modules/asyncio/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, isPy33, pythonOlder }:
+{ stdenv, buildPythonPackage, fetchPypi, pythonOlder }:
 
 buildPythonPackage rec {
   pname = "asyncio";
diff --git a/pkgs/development/python-modules/asynctest/default.nix b/pkgs/development/python-modules/asynctest/default.nix
index 0004badd6f40..187e0924ccac 100644
--- a/pkgs/development/python-modules/asynctest/default.nix
+++ b/pkgs/development/python-modules/asynctest/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, fetchFromGitHub, pythonOlder, python }:
+{ lib, buildPythonPackage, fetchPypi, pythonOlder, python }:
 
 buildPythonPackage rec {
   pname = "asynctest";
diff --git a/pkgs/development/python-modules/autograd/default.nix b/pkgs/development/python-modules/autograd/default.nix
index 1c3c1fdefbea..bf7c35fa6989 100644
--- a/pkgs/development/python-modules/autograd/default.nix
+++ b/pkgs/development/python-modules/autograd/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, numpy, future, nose }:
+{ stdenv, buildPythonPackage, fetchPypi, numpy, future }:
 
 buildPythonPackage rec {
   pname = "autograd";
diff --git a/pkgs/development/python-modules/behave/default.nix b/pkgs/development/python-modules/behave/default.nix
index a4a7b63b8a3f..6fc3f16b3ad2 100644
--- a/pkgs/development/python-modules/behave/default.nix
+++ b/pkgs/development/python-modules/behave/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchPypi
-, buildPythonApplication, isPy27, python, pythonOlder
+, buildPythonApplication, python, pythonOlder
 , mock, nose, pathpy, pyhamcrest, pytest
 , glibcLocales, parse, parse-type, six
 , traceback2
diff --git a/pkgs/development/python-modules/bootstrapped-pip/default.nix b/pkgs/development/python-modules/bootstrapped-pip/default.nix
index 240dd5513e85..2a9cb2a2cfdf 100644
--- a/pkgs/development/python-modules/bootstrapped-pip/default.nix
+++ b/pkgs/development/python-modules/bootstrapped-pip/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, python, fetchPypi, fetchurl, makeWrapper, unzip }:
+{ stdenv, python, fetchPypi, makeWrapper, unzip }:
 
 let
   wheel_source = fetchPypi {
diff --git a/pkgs/development/python-modules/bottleneck/default.nix b/pkgs/development/python-modules/bottleneck/default.nix
index 791b05e81cad..c9ca8f7ec047 100644
--- a/pkgs/development/python-modules/bottleneck/default.nix
+++ b/pkgs/development/python-modules/bottleneck/default.nix
@@ -1,5 +1,4 @@
-{ lib
-, buildPythonPackage
+{ buildPythonPackage
 , fetchPypi
 , nose
 , numpy
diff --git a/pkgs/development/python-modules/browsermob-proxy/default.nix b/pkgs/development/python-modules/browsermob-proxy/default.nix
index 5a9bae58bd6d..b5da73a32d21 100644
--- a/pkgs/development/python-modules/browsermob-proxy/default.nix
+++ b/pkgs/development/python-modules/browsermob-proxy/default.nix
@@ -1,5 +1,4 @@
 { lib
-, stdenv
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/bz2file/default.nix b/pkgs/development/python-modules/bz2file/default.nix
index 3bc9882585f6..8efb1c083f26 100644
--- a/pkgs/development/python-modules/bz2file/default.nix
+++ b/pkgs/development/python-modules/bz2file/default.nix
@@ -1,6 +1,5 @@
 { lib
 , buildPythonPackage
-, isPy3k
 , fetchPypi
 }:
 
diff --git a/pkgs/development/python-modules/cachetools/default.nix b/pkgs/development/python-modules/cachetools/default.nix
index de15ffaabc69..d4b9195c5558 100644
--- a/pkgs/development/python-modules/cachetools/default.nix
+++ b/pkgs/development/python-modules/cachetools/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, isPyPy }:
+{ stdenv, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "cachetools";
diff --git a/pkgs/development/python-modules/can/default.nix b/pkgs/development/python-modules/can/default.nix
index 395122b4da9e..f85f80ea2399 100644
--- a/pkgs/development/python-modules/can/default.nix
+++ b/pkgs/development/python-modules/can/default.nix
@@ -1,5 +1,4 @@
 { lib
-, stdenv
 , buildPythonPackage
 , fetchPypi
 , pyserial
diff --git a/pkgs/development/python-modules/canmatrix/default.nix b/pkgs/development/python-modules/canmatrix/default.nix
index 99ac6c3ec45b..3e07188986d0 100644
--- a/pkgs/development/python-modules/canmatrix/default.nix
+++ b/pkgs/development/python-modules/canmatrix/default.nix
@@ -1,5 +1,4 @@
 { lib
-, stdenv
 , buildPythonPackage
 , fetchFromGitHub
 , python
diff --git a/pkgs/development/python-modules/canopen/default.nix b/pkgs/development/python-modules/canopen/default.nix
index 08ae54e0b73b..1afe23416331 100644
--- a/pkgs/development/python-modules/canopen/default.nix
+++ b/pkgs/development/python-modules/canopen/default.nix
@@ -1,7 +1,5 @@
 { lib
-, stdenv
 , buildPythonPackage
-, fetchPypi
 , fetchFromGitHub
 , nose
 , can
diff --git a/pkgs/development/python-modules/cdecimal/default.nix b/pkgs/development/python-modules/cdecimal/default.nix
index 2c0b0e623ca9..0c636e120884 100644
--- a/pkgs/development/python-modules/cdecimal/default.nix
+++ b/pkgs/development/python-modules/cdecimal/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, wget, buildPythonPackage, isPy3k }:
+{ stdenv, fetchurl, buildPythonPackage, isPy3k }:
 
 with stdenv.lib;
 
diff --git a/pkgs/development/python-modules/cffi/default.nix b/pkgs/development/python-modules/cffi/default.nix
index 724769422761..3f1456f6e948 100644
--- a/pkgs/development/python-modules/cffi/default.nix
+++ b/pkgs/development/python-modules/cffi/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, isPy27, isPyPy, fetchPypi, libffi, pycparser, pytest }:
+{ stdenv, buildPythonPackage, isPyPy, fetchPypi, libffi, pycparser, pytest }:
 
 if isPyPy then null else buildPythonPackage rec {
   pname = "cffi";
diff --git a/pkgs/development/python-modules/cftime/default.nix b/pkgs/development/python-modules/cftime/default.nix
index 0e355723604e..425a53987caf 100644
--- a/pkgs/development/python-modules/cftime/default.nix
+++ b/pkgs/development/python-modules/cftime/default.nix
@@ -1,5 +1,4 @@
-{ lib
-, buildPythonPackage
+{ buildPythonPackage
 , fetchPypi
 , pytest
 , coveralls
diff --git a/pkgs/development/python-modules/chainer/default.nix b/pkgs/development/python-modules/chainer/default.nix
index b07a205ba215..cc75649119bd 100644
--- a/pkgs/development/python-modules/chainer/default.nix
+++ b/pkgs/development/python-modules/chainer/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, python
+{ stdenv, lib
 , buildPythonPackage, fetchPypi, isPy3k
 , filelock, protobuf, numpy, pytest, mock
 , cupy, cudaSupport ? false
diff --git a/pkgs/development/python-modules/characteristic/default.nix b/pkgs/development/python-modules/characteristic/default.nix
index f004e6d541c5..1c42b1283eee 100644
--- a/pkgs/development/python-modules/characteristic/default.nix
+++ b/pkgs/development/python-modules/characteristic/default.nix
@@ -1,5 +1,4 @@
-{ lib
-, buildPythonPackage
+{ buildPythonPackage
 , fetchPypi
 , pytest
 }:
diff --git a/pkgs/development/python-modules/circus/default.nix b/pkgs/development/python-modules/circus/default.nix
index 7e6cc206cdc0..0a82238b703e 100644
--- a/pkgs/development/python-modules/circus/default.nix
+++ b/pkgs/development/python-modules/circus/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi
+{ buildPythonPackage, fetchPypi
 , iowait, psutil, pyzmq, tornado, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/cmd2/default.nix b/pkgs/development/python-modules/cmd2/default.nix
index e83fd4163e4a..967941666c84 100644
--- a/pkgs/development/python-modules/cmd2/default.nix
+++ b/pkgs/development/python-modules/cmd2/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchPypi, buildPythonPackage, pythonOlder, isPy3k
 , pyperclip, six, pyparsing, vim, wcwidth, colorama
-, contextlib2 ? null, subprocess32 ? null
-, pytest, mock, which, fetchFromGitHub, glibcLocales
+, contextlib2 ? null
+, pytest, mock, which, glibcLocales
 }:
 buildPythonPackage rec {
   pname = "cmd2";
diff --git a/pkgs/development/python-modules/cmd2/old.nix b/pkgs/development/python-modules/cmd2/old.nix
index 5ffa51def0d2..7778e73f92f7 100644
--- a/pkgs/development/python-modules/cmd2/old.nix
+++ b/pkgs/development/python-modules/cmd2/old.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchPypi, buildPythonPackage, pythonOlder
+{ stdenv, buildPythonPackage, pythonOlder
 , pyperclip, six, pyparsing, vim
 , contextlib2 ? null, subprocess32 ? null
 , pytest, mock, which, fetchFromGitHub, glibcLocales
diff --git a/pkgs/development/python-modules/coinmarketcap/default.nix b/pkgs/development/python-modules/coinmarketcap/default.nix
index cfd6389ce5fb..bcf327147965 100644
--- a/pkgs/development/python-modules/coinmarketcap/default.nix
+++ b/pkgs/development/python-modules/coinmarketcap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests-cache }:
+{ lib, buildPythonPackage, fetchPypi, requests-cache }:
 
 buildPythonPackage rec {
   pname = "coinmarketcap";
diff --git a/pkgs/development/python-modules/colorlover/default.nix b/pkgs/development/python-modules/colorlover/default.nix
index 1ccb31d5120a..14bae27592ab 100644
--- a/pkgs/development/python-modules/colorlover/default.nix
+++ b/pkgs/development/python-modules/colorlover/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, python, stdenv, nose
+{ buildPythonPackage, fetchPypi, stdenv
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/configargparse/default.nix b/pkgs/development/python-modules/configargparse/default.nix
index 6a52076252e8..62e63a8e5b31 100644
--- a/pkgs/development/python-modules/configargparse/default.nix
+++ b/pkgs/development/python-modules/configargparse/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "ConfigArgParse";
diff --git a/pkgs/development/python-modules/configparser/default.nix b/pkgs/development/python-modules/configparser/default.nix
index 8e770c504c3b..7bef3e829351 100644
--- a/pkgs/development/python-modules/configparser/default.nix
+++ b/pkgs/development/python-modules/configparser/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, isPy3k }:
+{ stdenv, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "configparser";
diff --git a/pkgs/development/python-modules/construct/default.nix b/pkgs/development/python-modules/construct/default.nix
index afba2e17bf64..680f6e02cd01 100644
--- a/pkgs/development/python-modules/construct/default.nix
+++ b/pkgs/development/python-modules/construct/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchFromGitHub, six, pytest, pythonOlder }:
+{ stdenv, buildPythonPackage, fetchFromGitHub, six, pytest }:
 
 buildPythonPackage rec {
   pname = "construct";
diff --git a/pkgs/development/python-modules/coverage/default.nix b/pkgs/development/python-modules/coverage/default.nix
index 4d2a168f79cc..0aa38aed296d 100644
--- a/pkgs/development/python-modules/coverage/default.nix
+++ b/pkgs/development/python-modules/coverage/default.nix
@@ -1,7 +1,6 @@
 { lib
 , buildPythonPackage
 , fetchPypi
-, isPy3k
 , mock
 }:
 
diff --git a/pkgs/development/python-modules/cram/default.nix b/pkgs/development/python-modules/cram/default.nix
index 232a4a19fd85..f27cfc44e57b 100644
--- a/pkgs/development/python-modules/cram/default.nix
+++ b/pkgs/development/python-modules/cram/default.nix
@@ -1,4 +1,4 @@
-{stdenv, lib, buildPythonPackage, fetchPypi, bash, which, writeText}:
+{stdenv, lib, buildPythonPackage, fetchPypi, bash, which}:
 
 buildPythonPackage rec {
   version = "0.7";
diff --git a/pkgs/development/python-modules/credstash/default.nix b/pkgs/development/python-modules/credstash/default.nix
index e19850be8cee..db48326535db 100644
--- a/pkgs/development/python-modules/credstash/default.nix
+++ b/pkgs/development/python-modules/credstash/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, fetchpatch, cryptography, boto3, pyyaml, docutils, nose }:
+{ stdenv, buildPythonPackage, fetchPypi, cryptography, boto3, pyyaml, docutils, nose }:
 
 buildPythonPackage rec {
   pname = "credstash";
diff --git a/pkgs/development/python-modules/cryptography_vectors/default.nix b/pkgs/development/python-modules/cryptography_vectors/default.nix
index bcab5c434759..6285ac28fce1 100644
--- a/pkgs/development/python-modules/cryptography_vectors/default.nix
+++ b/pkgs/development/python-modules/cryptography_vectors/default.nix
@@ -1,6 +1,5 @@
 { buildPythonPackage
 , fetchPypi
-, cryptography
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/cupy/default.nix b/pkgs/development/python-modules/cupy/default.nix
index 3a3aeb7b2267..da742b310507 100644
--- a/pkgs/development/python-modules/cupy/default.nix
+++ b/pkgs/development/python-modules/cupy/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, python, buildPythonPackage
+{ stdenv, buildPythonPackage
 , fetchPypi, isPy3k, linuxPackages, gcc5
 , fastrlock, numpy, six, wheel, pytest, mock
 , cudatoolkit, cudnn, nccl
diff --git a/pkgs/development/python-modules/cx_freeze/default.nix b/pkgs/development/python-modules/cx_freeze/default.nix
index 69a5e8c11d48..67120bf0f3d0 100644
--- a/pkgs/development/python-modules/cx_freeze/default.nix
+++ b/pkgs/development/python-modules/cx_freeze/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, isPyPy, isPy35, ncurses }:
+{ stdenv, buildPythonPackage, fetchPypi, ncurses }:
 
 buildPythonPackage rec {
   pname = "cx_Freeze";
diff --git a/pkgs/development/python-modules/datadog/default.nix b/pkgs/development/python-modules/datadog/default.nix
index d01029652a98..47c206fda5e8 100644
--- a/pkgs/development/python-modules/datadog/default.nix
+++ b/pkgs/development/python-modules/datadog/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchFromGitHub, isPy3k
+{ lib, buildPythonPackage, fetchFromGitHub
 , decorator, requests, simplejson
 , nose, mock }:
 
diff --git a/pkgs/development/python-modules/dateparser/default.nix b/pkgs/development/python-modules/dateparser/default.nix
index fdc408e1c4c1..f6af0855b9f5 100644
--- a/pkgs/development/python-modules/dateparser/default.nix
+++ b/pkgs/development/python-modules/dateparser/default.nix
@@ -1,4 +1,4 @@
-{ lib, fetchPypi, buildPythonPackage, isPy3k
+{ lib, fetchPypi, buildPythonPackage
 , nose
 , parameterized
 , mock
diff --git a/pkgs/development/python-modules/debian/default.nix b/pkgs/development/python-modules/debian/default.nix
index 937b6df42292..e4cd21bce4a3 100644
--- a/pkgs/development/python-modules/debian/default.nix
+++ b/pkgs/development/python-modules/debian/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi
+{ buildPythonPackage, fetchPypi
 , chardet, six}:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/defusedxml/default.nix b/pkgs/development/python-modules/defusedxml/default.nix
index 6426333ed26a..328195365006 100644
--- a/pkgs/development/python-modules/defusedxml/default.nix
+++ b/pkgs/development/python-modules/defusedxml/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi }:
+{ buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "defusedxml";
diff --git a/pkgs/development/python-modules/django_tagging/default.nix b/pkgs/development/python-modules/django_tagging/default.nix
index 6b048db90e30..fa06117a6449 100644
--- a/pkgs/development/python-modules/django_tagging/default.nix
+++ b/pkgs/development/python-modules/django_tagging/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, django }:
+{ buildPythonPackage, fetchPypi, django }:
 
 buildPythonPackage rec {
   pname = "django-tagging";
diff --git a/pkgs/development/python-modules/dkimpy/default.nix b/pkgs/development/python-modules/dkimpy/default.nix
index dabc3244592a..7ce8877bbce0 100644
--- a/pkgs/development/python-modules/dkimpy/default.nix
+++ b/pkgs/development/python-modules/dkimpy/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchPypi, openssl, makeWrapper, buildPythonPackage
+{ stdenv, fetchPypi, openssl, buildPythonPackage
 , pytest, dnspython, pynacl, authres, python }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/dugong/default.nix b/pkgs/development/python-modules/dugong/default.nix
index 27b1a3e6122c..20f4bc7e0c33 100644
--- a/pkgs/development/python-modules/dugong/default.nix
+++ b/pkgs/development/python-modules/dugong/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, pythonOlder }:
+{ buildPythonPackage, fetchPypi, pythonOlder }:
 
 buildPythonPackage rec {
   pname = "dugong";
diff --git a/pkgs/development/python-modules/ecpy/default.nix b/pkgs/development/python-modules/ecpy/default.nix
index 334778c93aab..97f04828300b 100644
--- a/pkgs/development/python-modules/ecpy/default.nix
+++ b/pkgs/development/python-modules/ecpy/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchPypi, buildPythonPackage, isPy3k, hidapi
-, pycrypto, pillow, protobuf, future, ecpy
+, pycrypto, pillow, protobuf, future
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/email-validator/default.nix b/pkgs/development/python-modules/email-validator/default.nix
index a0a619a39c84..99859ac15175 100644
--- a/pkgs/development/python-modules/email-validator/default.nix
+++ b/pkgs/development/python-modules/email-validator/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi, isPy3k, dnspython, idna, ipaddress }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, dnspython, idna, ipaddress }:
 
 buildPythonPackage rec {
   pname = "email_validator";
diff --git a/pkgs/development/python-modules/faulthandler/default.nix b/pkgs/development/python-modules/faulthandler/default.nix
index a05ac1ba679e..c4d600ec994e 100644
--- a/pkgs/development/python-modules/faulthandler/default.nix
+++ b/pkgs/development/python-modules/faulthandler/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchPypi, buildPythonPackage, fetchpatch }:
+{ stdenv, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "faulthandler";
diff --git a/pkgs/development/python-modules/feedgen/default.nix b/pkgs/development/python-modules/feedgen/default.nix
index c5ac67106a2f..67ff86e8f729 100644
--- a/pkgs/development/python-modules/feedgen/default.nix
+++ b/pkgs/development/python-modules/feedgen/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, fetchurl, dateutil, lxml }:
+{ stdenv, buildPythonPackage, fetchPypi, dateutil, lxml }:
 
 buildPythonPackage rec {
   pname = "feedgen";
diff --git a/pkgs/development/python-modules/flake8-future-import/default.nix b/pkgs/development/python-modules/flake8-future-import/default.nix
index 2612cfde1f50..eaed804245fa 100644
--- a/pkgs/development/python-modules/flake8-future-import/default.nix
+++ b/pkgs/development/python-modules/flake8-future-import/default.nix
@@ -1,5 +1,4 @@
-{ lib, fetchFromGitHub, buildPythonPackage, python, flake8, six,
-  fetchurl }:
+{ lib, fetchFromGitHub, buildPythonPackage, flake8, six }:
 
 buildPythonPackage rec {
   pname = "flake8-future-import";
diff --git a/pkgs/development/python-modules/flask-migrate/default.nix b/pkgs/development/python-modules/flask-migrate/default.nix
index f4fc3cf3fa24..89cbdf0fbf82 100644
--- a/pkgs/development/python-modules/flask-migrate/default.nix
+++ b/pkgs/development/python-modules/flask-migrate/default.nix
@@ -1,5 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, isPy3k, python, glibcLocales, flask, flask_sqlalchemy, flask_script, alembic
-}:
+{ stdenv, buildPythonPackage, fetchPypi, isPy3k, glibcLocales, flask, flask_sqlalchemy, flask_script, alembic }:
 
 with stdenv.lib;
 
diff --git a/pkgs/development/python-modules/flit/default.nix b/pkgs/development/python-modules/flit/default.nix
index 17b9d018c397..d9a0682a02e0 100644
--- a/pkgs/development/python-modules/flit/default.nix
+++ b/pkgs/development/python-modules/flit/default.nix
@@ -1,7 +1,6 @@
 { lib
 , buildPythonPackage
 , fetchPypi
-, fetchurl
 , isPy3k
 , docutils
 , requests
diff --git a/pkgs/development/python-modules/fpdf/default.nix b/pkgs/development/python-modules/fpdf/default.nix
index c09d54ad5555..a528244cb0f9 100644
--- a/pkgs/development/python-modules/fpdf/default.nix
+++ b/pkgs/development/python-modules/fpdf/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, writeText, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "fpdf";
diff --git a/pkgs/development/python-modules/ftfy/default.nix b/pkgs/development/python-modules/ftfy/default.nix
index ca1c9a09e4eb..d2e806e43b90 100644
--- a/pkgs/development/python-modules/ftfy/default.nix
+++ b/pkgs/development/python-modules/ftfy/default.nix
@@ -4,8 +4,6 @@
 , html5lib
 , wcwidth
 , nose
-, python
-, isPy3k
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/gensim/default.nix b/pkgs/development/python-modules/gensim/default.nix
index 3faa6d914d25..1b3ab52c4c39 100644
--- a/pkgs/development/python-modules/gensim/default.nix
+++ b/pkgs/development/python-modules/gensim/default.nix
@@ -5,9 +5,6 @@
 , six
 , scipy
 , smart_open
-, scikitlearn
-, testfixtures
-, unittest2
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/graph-tool/2.x.x.nix b/pkgs/development/python-modules/graph-tool/2.x.x.nix
index 7f2c7a582290..aa8050de0885 100644
--- a/pkgs/development/python-modules/graph-tool/2.x.x.nix
+++ b/pkgs/development/python-modules/graph-tool/2.x.x.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, python, cairomm, sparsehash, pycairo, autoreconfHook,
-pkgconfig, boost, expat, scipy, numpy, cgal, gmp, mpfr, lndir,
+pkgconfig, boost, expat, scipy, cgal, gmp, mpfr,
 gobjectIntrospection, pygobject3, gtk3, matplotlib, ncurses,
 buildPythonPackage }:
 
diff --git a/pkgs/development/python-modules/h5py/default.nix b/pkgs/development/python-modules/h5py/default.nix
index 144e826b675d..2b95b1473cb2 100644
--- a/pkgs/development/python-modules/h5py/default.nix
+++ b/pkgs/development/python-modules/h5py/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchPypi, fetchpatch, isPy27, python, buildPythonPackage
+{ stdenv, fetchPypi, isPy27, python, buildPythonPackage
 , numpy, hdf5, cython, six, pkgconfig, unittest2
 , mpi4py ? null, openssh }:
 
diff --git a/pkgs/development/python-modules/hupper/default.nix b/pkgs/development/python-modules/hupper/default.nix
index bbd4760bdf89..5131e64a3c2b 100644
--- a/pkgs/development/python-modules/hupper/default.nix
+++ b/pkgs/development/python-modules/hupper/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, python
+{ stdenv, buildPythonPackage, fetchPypi
 , pytest, pytestcov, watchdog, mock
 }:
 
diff --git a/pkgs/development/python-modules/hypchat/default.nix b/pkgs/development/python-modules/hypchat/default.nix
index b72544611833..8337fd2230ba 100644
--- a/pkgs/development/python-modules/hypchat/default.nix
+++ b/pkgs/development/python-modules/hypchat/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi
+{ buildPythonPackage, fetchPypi
 , requests, six, dateutil }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/hypothesis/default.nix b/pkgs/development/python-modules/hypothesis/default.nix
index d5ee59ac2d92..88705962627f 100644
--- a/pkgs/development/python-modules/hypothesis/default.nix
+++ b/pkgs/development/python-modules/hypothesis/default.nix
@@ -1,6 +1,6 @@
-{ lib, buildPythonPackage, fetchFromGitHub, python
+{ lib, buildPythonPackage, fetchFromGitHub
 , isPy3k, attrs, coverage, enum34
-, doCheck ? true, pytest, pytest_xdist, flake8, flaky, mock
+, doCheck ? true, pytest, pytest_xdist, flaky, mock
 }:
 buildPythonPackage rec {
   # http://hypothesis.readthedocs.org/en/latest/packaging.html
diff --git a/pkgs/development/python-modules/image-match/default.nix b/pkgs/development/python-modules/image-match/default.nix
index 25c3c901a4ef..49d1062abc31 100644
--- a/pkgs/development/python-modules/image-match/default.nix
+++ b/pkgs/development/python-modules/image-match/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchFromGitHub, pytestrunner, dask, scikitimage, six }:
+{ stdenv, buildPythonPackage, fetchFromGitHub, pytestrunner, scikitimage }:
 
 buildPythonPackage {
   pname = "image-match";
diff --git a/pkgs/development/python-modules/iowait/default.nix b/pkgs/development/python-modules/iowait/default.nix
index ef2444c0d2f0..c67d56b153e0 100644
--- a/pkgs/development/python-modules/iowait/default.nix
+++ b/pkgs/development/python-modules/iowait/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi }:
+{ buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "iowait";
diff --git a/pkgs/development/python-modules/ipython/5.nix b/pkgs/development/python-modules/ipython/5.nix
index a91988bd97d0..f2066fee2a4a 100644
--- a/pkgs/development/python-modules/ipython/5.nix
+++ b/pkgs/development/python-modules/ipython/5.nix
@@ -2,7 +2,6 @@
 , stdenv
 , buildPythonPackage
 , fetchPypi
-, pythonOlder
 # Build dependencies
 , glibcLocales
 # Test dependencies
@@ -13,7 +12,6 @@
 , mock
 # Runtime dependencies
 , backports_shutil_get_terminal_size
-, jedi
 , decorator
 , pathlib2
 , pickleshare
diff --git a/pkgs/development/python-modules/joblib/default.nix b/pkgs/development/python-modules/joblib/default.nix
index 65d1f4f68220..17896a58469c 100644
--- a/pkgs/development/python-modules/joblib/default.nix
+++ b/pkgs/development/python-modules/joblib/default.nix
@@ -1,11 +1,8 @@
 { lib
 , buildPythonPackage
 , fetchPypi
-, nose
 , sphinx
 , numpydoc
-, isPy3k
-, stdenv
 , pytest
 }:
 
diff --git a/pkgs/development/python-modules/jsmin/default.nix b/pkgs/development/python-modules/jsmin/default.nix
index 3a6d69cc829f..f11fccb086bc 100644
--- a/pkgs/development/python-modules/jsmin/default.nix
+++ b/pkgs/development/python-modules/jsmin/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "jsmin";
diff --git a/pkgs/development/python-modules/jupyter_core/default.nix b/pkgs/development/python-modules/jupyter_core/default.nix
index c934d24dab7b..a6a955507a79 100644
--- a/pkgs/development/python-modules/jupyter_core/default.nix
+++ b/pkgs/development/python-modules/jupyter_core/default.nix
@@ -1,5 +1,4 @@
 { lib
-, python
 , buildPythonPackage
 , fetchPypi
 , ipython
diff --git a/pkgs/development/python-modules/jupyterhub/default.nix b/pkgs/development/python-modules/jupyterhub/default.nix
index dbd2e36b7b84..8598654e2060 100644
--- a/pkgs/development/python-modules/jupyterhub/default.nix
+++ b/pkgs/development/python-modules/jupyterhub/default.nix
@@ -1,5 +1,4 @@
 { lib
-, python
 , buildPythonPackage
 , fetchPypi
 , fetchzip
@@ -13,7 +12,6 @@
 , traitlets
 , requests
 , pythonOlder
-, nodejs-8_x
 , nodePackages
 }:
 
diff --git a/pkgs/development/python-modules/kaitaistruct/default.nix b/pkgs/development/python-modules/kaitaistruct/default.nix
index 19169e88b125..a1e795421b07 100644
--- a/pkgs/development/python-modules/kaitaistruct/default.nix
+++ b/pkgs/development/python-modules/kaitaistruct/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, kaitaistruct, buildPythonPackage, fetchPypi }:
+{ stdenv, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "kaitaistruct";
diff --git a/pkgs/development/python-modules/keras/default.nix b/pkgs/development/python-modules/keras/default.nix
index be59a112be74..3b221238f3af 100644
--- a/pkgs/development/python-modules/keras/default.nix
+++ b/pkgs/development/python-modules/keras/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi
+{ stdenv, buildPythonPackage, fetchPypi
 , pytest, pytestcov, pytestpep8, pytest_xdist
 , six, numpy, scipy, pyyaml, h5py
 }:
diff --git a/pkgs/development/python-modules/ldap/default.nix b/pkgs/development/python-modules/ldap/default.nix
index 95672600a30a..17a6b158d3f2 100644
--- a/pkgs/development/python-modules/ldap/default.nix
+++ b/pkgs/development/python-modules/ldap/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi
+{ buildPythonPackage, fetchPypi
 , pyasn1, pyasn1-modules, pytest
 , openldap, cyrus_sasl }:
 
diff --git a/pkgs/development/python-modules/ldappool/default.nix b/pkgs/development/python-modules/ldappool/default.nix
index 58ca72a3dc98..02d10b832ff2 100644
--- a/pkgs/development/python-modules/ldappool/default.nix
+++ b/pkgs/development/python-modules/ldappool/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi
 , pbr, ldap, fixtures, testresources, testtools }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/libarcus/default.nix b/pkgs/development/python-modules/libarcus/default.nix
index 2fc66e810d06..fc58c6ca6a1d 100644
--- a/pkgs/development/python-modules/libarcus/default.nix
+++ b/pkgs/development/python-modules/libarcus/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub
-, python, cmake, sip, protobuf, pythonOlder }:
+{ stdenv, buildPythonPackage, fetchFromGitHub
+, cmake, sip, protobuf, pythonOlder }:
 
 buildPythonPackage rec {
   pname = "libarcus";
diff --git a/pkgs/development/python-modules/libgpuarray/default.nix b/pkgs/development/python-modules/libgpuarray/default.nix
index 14e83584678c..ef01fde2daa7 100644
--- a/pkgs/development/python-modules/libgpuarray/default.nix
+++ b/pkgs/development/python-modules/libgpuarray/default.nix
@@ -8,7 +8,6 @@
 , six
 , nose
 , Mako
-, python
 , cudaSupport ? false, cudatoolkit , nvidia_x11
 , openclSupport ? true, ocl-icd, clblas
 }:
diff --git a/pkgs/development/python-modules/libversion/default.nix b/pkgs/development/python-modules/libversion/default.nix
index cf0a1a865a19..75e55944e987 100644
--- a/pkgs/development/python-modules/libversion/default.nix
+++ b/pkgs/development/python-modules/libversion/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, python, pkgconfig, libversion, pythonOlder }:
+{ stdenv, buildPythonPackage, fetchPypi, pkgconfig, libversion, pythonOlder }:
 
 buildPythonPackage rec {
   pname = "libversion";
diff --git a/pkgs/development/python-modules/libvirt/default.nix b/pkgs/development/python-modules/libvirt/default.nix
index a99d4542ba5a..26b42020fc34 100644
--- a/pkgs/development/python-modules/libvirt/default.nix
+++ b/pkgs/development/python-modules/libvirt/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchgit, python, pkgconfig, lxml, libvirt, nose }:
+{ stdenv, buildPythonPackage, fetchgit, pkgconfig, lxml, libvirt, nose }:
 
 buildPythonPackage rec {
   pname = "libvirt";
diff --git a/pkgs/development/python-modules/linode-api/default.nix b/pkgs/development/python-modules/linode-api/default.nix
index ad6b938c9888..4689050ba6c7 100644
--- a/pkgs/development/python-modules/linode-api/default.nix
+++ b/pkgs/development/python-modules/linode-api/default.nix
@@ -1,7 +1,6 @@
 { stdenv,
   buildPythonPackage,
   fetchFromGitHub,
-  isPy3k,
   pythonOlder,
   lib,
   requests,
diff --git a/pkgs/development/python-modules/lmtpd/default.nix b/pkgs/development/python-modules/lmtpd/default.nix
index c9b9b4896139..bc91139728b0 100644
--- a/pkgs/development/python-modules/lmtpd/default.nix
+++ b/pkgs/development/python-modules/lmtpd/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, fetchFromGitHub }:
+{ stdenv, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "lmtpd";
diff --git a/pkgs/development/python-modules/marionette-harness/default.nix b/pkgs/development/python-modules/marionette-harness/default.nix
index 4a96ce8ad051..ff1a6e49b013 100644
--- a/pkgs/development/python-modules/marionette-harness/default.nix
+++ b/pkgs/development/python-modules/marionette-harness/default.nix
@@ -1,5 +1,4 @@
 { lib
-, stdenv
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/marionette-harness/manifestparser.nix b/pkgs/development/python-modules/marionette-harness/manifestparser.nix
index 5d52b52ac7f2..7316526aa280 100644
--- a/pkgs/development/python-modules/marionette-harness/manifestparser.nix
+++ b/pkgs/development/python-modules/marionette-harness/manifestparser.nix
@@ -1,5 +1,4 @@
 { lib
-, stdenv
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/marionette-harness/marionette_driver.nix b/pkgs/development/python-modules/marionette-harness/marionette_driver.nix
index d27637874af8..b6d761f077ce 100644
--- a/pkgs/development/python-modules/marionette-harness/marionette_driver.nix
+++ b/pkgs/development/python-modules/marionette-harness/marionette_driver.nix
@@ -1,5 +1,4 @@
 { lib
-, stdenv
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/marionette-harness/mozcrash.nix b/pkgs/development/python-modules/marionette-harness/mozcrash.nix
index ccd0eb6cc9f8..3f7710acb3c1 100644
--- a/pkgs/development/python-modules/marionette-harness/mozcrash.nix
+++ b/pkgs/development/python-modules/marionette-harness/mozcrash.nix
@@ -1,5 +1,4 @@
 { lib
-, stdenv
 , buildPythonPackage
 , fetchPypi
 , mozfile
diff --git a/pkgs/development/python-modules/marionette-harness/mozdevice.nix b/pkgs/development/python-modules/marionette-harness/mozdevice.nix
index 8569d9287ac8..491069cd87fb 100644
--- a/pkgs/development/python-modules/marionette-harness/mozdevice.nix
+++ b/pkgs/development/python-modules/marionette-harness/mozdevice.nix
@@ -1,5 +1,4 @@
 { lib
-, stdenv
 , buildPythonPackage
 , fetchPypi
 , moznetwork
diff --git a/pkgs/development/python-modules/marionette-harness/mozfile.nix b/pkgs/development/python-modules/marionette-harness/mozfile.nix
index 7bd14f2d10ca..34350dd4821f 100644
--- a/pkgs/development/python-modules/marionette-harness/mozfile.nix
+++ b/pkgs/development/python-modules/marionette-harness/mozfile.nix
@@ -1,5 +1,4 @@
 { lib
-, stdenv
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/marionette-harness/mozhttpd.nix b/pkgs/development/python-modules/marionette-harness/mozhttpd.nix
index 1d1be733f998..6862967e420f 100644
--- a/pkgs/development/python-modules/marionette-harness/mozhttpd.nix
+++ b/pkgs/development/python-modules/marionette-harness/mozhttpd.nix
@@ -1,5 +1,4 @@
 { lib
-, stdenv
 , buildPythonPackage
 , fetchPypi
 , moznetwork
diff --git a/pkgs/development/python-modules/marionette-harness/mozlog.nix b/pkgs/development/python-modules/marionette-harness/mozlog.nix
index dfe91309ea40..bc4b9e914653 100644
--- a/pkgs/development/python-modules/marionette-harness/mozlog.nix
+++ b/pkgs/development/python-modules/marionette-harness/mozlog.nix
@@ -1,5 +1,4 @@
 { lib
-, stdenv
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/marionette-harness/moznetwork.nix b/pkgs/development/python-modules/marionette-harness/moznetwork.nix
index a6561d3e07ac..3901f7c310d0 100644
--- a/pkgs/development/python-modules/marionette-harness/moznetwork.nix
+++ b/pkgs/development/python-modules/marionette-harness/moznetwork.nix
@@ -1,5 +1,4 @@
 { lib
-, stdenv
 , buildPythonPackage
 , fetchPypi
 , mozlog
diff --git a/pkgs/development/python-modules/marionette-harness/mozprocess.nix b/pkgs/development/python-modules/marionette-harness/mozprocess.nix
index c1e534432607..e8130e8038fd 100644
--- a/pkgs/development/python-modules/marionette-harness/mozprocess.nix
+++ b/pkgs/development/python-modules/marionette-harness/mozprocess.nix
@@ -1,5 +1,4 @@
 { lib
-, stdenv
 , buildPythonPackage
 , fetchPypi
 , mozinfo
diff --git a/pkgs/development/python-modules/marionette-harness/mozprofile.nix b/pkgs/development/python-modules/marionette-harness/mozprofile.nix
index c94acdd3ba5a..3620248904ce 100644
--- a/pkgs/development/python-modules/marionette-harness/mozprofile.nix
+++ b/pkgs/development/python-modules/marionette-harness/mozprofile.nix
@@ -1,5 +1,4 @@
 { lib
-, stdenv
 , buildPythonPackage
 , fetchPypi
 , mozlog
diff --git a/pkgs/development/python-modules/marionette-harness/mozrunner.nix b/pkgs/development/python-modules/marionette-harness/mozrunner.nix
index e9f6177cfa1b..324c7c6c2d24 100644
--- a/pkgs/development/python-modules/marionette-harness/mozrunner.nix
+++ b/pkgs/development/python-modules/marionette-harness/mozrunner.nix
@@ -1,5 +1,4 @@
 { lib
-, stdenv
 , buildPythonPackage
 , fetchPypi
 , mozdevice
diff --git a/pkgs/development/python-modules/marionette-harness/moztest.nix b/pkgs/development/python-modules/marionette-harness/moztest.nix
index d1c799c95dee..2ff50e1fa92e 100644
--- a/pkgs/development/python-modules/marionette-harness/moztest.nix
+++ b/pkgs/development/python-modules/marionette-harness/moztest.nix
@@ -1,5 +1,4 @@
 { lib
-, stdenv
 , buildPythonPackage
 , fetchPypi
 , mozinfo
diff --git a/pkgs/development/python-modules/marionette-harness/mozversion.nix b/pkgs/development/python-modules/marionette-harness/mozversion.nix
index c9eb12bd52b4..dbe3cb4bc2d8 100644
--- a/pkgs/development/python-modules/marionette-harness/mozversion.nix
+++ b/pkgs/development/python-modules/marionette-harness/mozversion.nix
@@ -1,5 +1,4 @@
 { lib
-, stdenv
 , buildPythonPackage
 , fetchPypi
 , mozlog
diff --git a/pkgs/development/python-modules/moto/default.nix b/pkgs/development/python-modules/moto/default.nix
index e4b2bdefad20..cfb70724210e 100644
--- a/pkgs/development/python-modules/moto/default.nix
+++ b/pkgs/development/python-modules/moto/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, jinja2, werkzeug, flask
+{ buildPythonPackage, fetchPypi, jinja2, werkzeug, flask
 , requests, pytz, backports_tempfile, cookies, jsondiff, botocore, aws-xray-sdk, docker, responses
 , six, boto, httpretty, xmltodict, nose, sure, boto3, freezegun, dateutil, mock, pyaml }:
 
diff --git a/pkgs/development/python-modules/mrbob/default.nix b/pkgs/development/python-modules/mrbob/default.nix
index 3f974872b959..6dbfa1fae603 100644
--- a/pkgs/development/python-modules/mrbob/default.nix
+++ b/pkgs/development/python-modules/mrbob/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage, stdenv, glibcLocales, mock, nose, isPy3k, argparse, jinja2, six
-, fetchPypi, lib
+, fetchPypi
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/murmurhash/default.nix b/pkgs/development/python-modules/murmurhash/default.nix
index f689bc2ff49d..a3a9096a335c 100644
--- a/pkgs/development/python-modules/murmurhash/default.nix
+++ b/pkgs/development/python-modules/murmurhash/default.nix
@@ -2,7 +2,6 @@
 , buildPythonPackage
 , fetchPypi
 , cython
-, python
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/nbconvert/default.nix b/pkgs/development/python-modules/nbconvert/default.nix
index dfa87c843ff2..b167b7f427c1 100644
--- a/pkgs/development/python-modules/nbconvert/default.nix
+++ b/pkgs/development/python-modules/nbconvert/default.nix
@@ -13,7 +13,6 @@
 , testpath
 , jupyter_core
 , nbformat
-, nbconvert
 , ipykernel
 , pandocfilters
 , tornado
diff --git a/pkgs/development/python-modules/ncclient/default.nix b/pkgs/development/python-modules/ncclient/default.nix
index 4cc5769d8d83..27fc7d11e751 100644
--- a/pkgs/development/python-modules/ncclient/default.nix
+++ b/pkgs/development/python-modules/ncclient/default.nix
@@ -5,7 +5,6 @@
 , lxml
 , libxml2
 , libxslt
-, pytest
 , nose
 , rednose
 }:
diff --git a/pkgs/development/python-modules/netdisco/default.nix b/pkgs/development/python-modules/netdisco/default.nix
index af7e4dde59e3..e60233c3590e 100644
--- a/pkgs/development/python-modules/netdisco/default.nix
+++ b/pkgs/development/python-modules/netdisco/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, isPy3k, fetchFromGitHub, fetchpatch, requests, zeroconf, netifaces, pytest }:
+{ stdenv, buildPythonPackage, isPy3k, fetchFromGitHub, requests, zeroconf, netifaces, pytest }:
 
 buildPythonPackage rec {
   pname = "netdisco";
diff --git a/pkgs/development/python-modules/nltk/default.nix b/pkgs/development/python-modules/nltk/default.nix
index 9645e54f7ec1..56edc44bce71 100644
--- a/pkgs/development/python-modules/nltk/default.nix
+++ b/pkgs/development/python-modules/nltk/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, buildPythonPackage, isPy33, lib, six, pythonAtLeast, pythonOlder }:
+{ fetchurl, buildPythonPackage, lib, six, pythonAtLeast, pythonOlder }:
 
 buildPythonPackage rec {
   version = "3.2.5";
diff --git a/pkgs/development/python-modules/numpy/default.nix b/pkgs/development/python-modules/numpy/default.nix
index d6531eda2ef1..d9e884dabbe0 100644
--- a/pkgs/development/python-modules/numpy/default.nix
+++ b/pkgs/development/python-modules/numpy/default.nix
@@ -1,4 +1,4 @@
-{lib, fetchPypi, python, buildPythonPackage, isPy27, isPyPy, gfortran, nose, blas, hostPlatform }:
+{lib, fetchPypi, python, buildPythonPackage, isPyPy, gfortran, nose, blas, hostPlatform }:
 
 buildPythonPackage rec {
   pname = "numpy";
diff --git a/pkgs/development/python-modules/ovh/default.nix b/pkgs/development/python-modules/ovh/default.nix
index 3f37940ed8ae..474609220cfa 100644
--- a/pkgs/development/python-modules/ovh/default.nix
+++ b/pkgs/development/python-modules/ovh/default.nix
@@ -1,9 +1,6 @@
 { lib
 , buildPythonPackage
 , fetchPypi
-, requests
-, nose
-, mock
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pandas/0.17.1.nix b/pkgs/development/python-modules/pandas/0.17.1.nix
index 2c0a2c44f6eb..e4973d0d6e39 100644
--- a/pkgs/development/python-modules/pandas/0.17.1.nix
+++ b/pkgs/development/python-modules/pandas/0.17.1.nix
@@ -1,8 +1,6 @@
 { buildPythonPackage
 , fetchPypi
-, python
 , stdenv
-, fetchurl
 , pytest
 , glibcLocales
 , cython
diff --git a/pkgs/development/python-modules/pandas/default.nix b/pkgs/development/python-modules/pandas/default.nix
index 08fdddb73467..fc75e5803afc 100644
--- a/pkgs/development/python-modules/pandas/default.nix
+++ b/pkgs/development/python-modules/pandas/default.nix
@@ -2,7 +2,6 @@
 , fetchPypi
 , python
 , stdenv
-, fetchurl
 , pytest
 , glibcLocales
 , cython
diff --git a/pkgs/development/python-modules/parse-type/default.nix b/pkgs/development/python-modules/parse-type/default.nix
index ac150af4b782..34573626baca 100644
--- a/pkgs/development/python-modules/parse-type/default.nix
+++ b/pkgs/development/python-modules/parse-type/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchPypi, fetchpatch
+{ stdenv, fetchPypi
 , buildPythonPackage, pythonOlder
 , pytest, pytestrunner
 , parse, six, enum34
diff --git a/pkgs/development/python-modules/parse/default.nix b/pkgs/development/python-modules/parse/default.nix
index 18cc23338bf6..4092f5e1c4f3 100644
--- a/pkgs/development/python-modules/parse/default.nix
+++ b/pkgs/development/python-modules/parse/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchPypi, fetchpatch
+{ stdenv, fetchPypi
 , buildPythonPackage, python
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/passlib/default.nix b/pkgs/development/python-modules/passlib/default.nix
index 165de7bd2baf..24539c7bbcef 100644
--- a/pkgs/development/python-modules/passlib/default.nix
+++ b/pkgs/development/python-modules/passlib/default.nix
@@ -1,5 +1,4 @@
-{ lib
-, buildPythonPackage
+{ buildPythonPackage
 , fetchPypi
 , nose
 , bcrypt
diff --git a/pkgs/development/python-modules/pelican/default.nix b/pkgs/development/python-modules/pelican/default.nix
index 2d1f707a8ebd..1ee93c753d80 100644
--- a/pkgs/development/python-modules/pelican/default.nix
+++ b/pkgs/development/python-modules/pelican/default.nix
@@ -1,5 +1,5 @@
 { stdenv, buildPythonPackage, fetchFromGitHub
-, glibcLocales, pandoc, git
+, glibcLocales, git
 , mock, nose, markdown, lxml, typogrify
 , jinja2, pygments, docutils, pytz, unidecode, six, dateutil, feedgenerator
 , blinker, pillow, beautifulsoup4, markupsafe }:
diff --git a/pkgs/development/python-modules/persistent/default.nix b/pkgs/development/python-modules/persistent/default.nix
index b861797c4a8f..4f2e7f3ca845 100644
--- a/pkgs/development/python-modules/persistent/default.nix
+++ b/pkgs/development/python-modules/persistent/default.nix
@@ -1,7 +1,6 @@
 { buildPythonPackage
 , fetchPypi
 , zope_interface
-, pkgs
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/plaster-pastedeploy/default.nix b/pkgs/development/python-modules/plaster-pastedeploy/default.nix
index 3f90e6b2da7d..5675be323973 100644
--- a/pkgs/development/python-modules/plaster-pastedeploy/default.nix
+++ b/pkgs/development/python-modules/plaster-pastedeploy/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, python
+{ buildPythonPackage, fetchPypi
 , plaster, PasteDeploy
 , pytest, pytestcov
 }:
diff --git a/pkgs/development/python-modules/plaster/default.nix b/pkgs/development/python-modules/plaster/default.nix
index 8c3de8bd0351..82aaebb10039 100644
--- a/pkgs/development/python-modules/plaster/default.nix
+++ b/pkgs/development/python-modules/plaster/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, python
+{ buildPythonPackage, fetchPypi
 , pytest, pytestcov
 }:
 
diff --git a/pkgs/development/python-modules/pluggy/default.nix b/pkgs/development/python-modules/pluggy/default.nix
index 0fbfa5108c1b..2a6996c628e6 100644
--- a/pkgs/development/python-modules/pluggy/default.nix
+++ b/pkgs/development/python-modules/pluggy/default.nix
@@ -1,7 +1,6 @@
 { buildPythonPackage
 , lib
 , fetchPypi
-, pytest
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/plumbum/default.nix b/pkgs/development/python-modules/plumbum/default.nix
index 5269ecd5d8b4..2c6eb7e5fbf7 100644
--- a/pkgs/development/python-modules/plumbum/default.nix
+++ b/pkgs/development/python-modules/plumbum/default.nix
@@ -1,5 +1,4 @@
-{ lib
-, buildPythonPackage
+{ buildPythonPackage
 , fetchPypi
 , pytest
 }:
diff --git a/pkgs/development/python-modules/poppler-qt5/default.nix b/pkgs/development/python-modules/poppler-qt5/default.nix
index 0ae689034a3a..2b00a007f90b 100644
--- a/pkgs/development/python-modules/poppler-qt5/default.nix
+++ b/pkgs/development/python-modules/poppler-qt5/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage, fetchPypi, stdenv, sip, qtbase, pyqt5, poppler, pkgconfig, fetchpatch
-, python, substituteAll
+, substituteAll
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/powerline/default.nix b/pkgs/development/python-modules/powerline/default.nix
index f51c6989c011..841e003bc897 100644
--- a/pkgs/development/python-modules/powerline/default.nix
+++ b/pkgs/development/python-modules/powerline/default.nix
@@ -1,9 +1,6 @@
 { lib
 , fetchurl
 , buildPythonPackage
-, git
-, mercurial
-, bazaar
 , psutil
 , pygit2
 }:
diff --git a/pkgs/development/python-modules/progressbar2/default.nix b/pkgs/development/python-modules/progressbar2/default.nix
index 212c06cc9421..18fb14c3aa9a 100644
--- a/pkgs/development/python-modules/progressbar2/default.nix
+++ b/pkgs/development/python-modules/progressbar2/default.nix
@@ -2,7 +2,6 @@
 , python
 , buildPythonPackage
 , fetchFromGitHub
-, isPy3k
 , pytest
 , python-utils
 , sphinx
diff --git a/pkgs/development/python-modules/prometheus_client/default.nix b/pkgs/development/python-modules/prometheus_client/default.nix
index eaf353af0823..f6b2bfa939c6 100644
--- a/pkgs/development/python-modules/prometheus_client/default.nix
+++ b/pkgs/development/python-modules/prometheus_client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "prometheus_client";
diff --git a/pkgs/development/python-modules/psutil/default.nix b/pkgs/development/python-modules/psutil/default.nix
index 7fbdfb7c33eb..84fe2f695545 100644
--- a/pkgs/development/python-modules/psutil/default.nix
+++ b/pkgs/development/python-modules/psutil/default.nix
@@ -2,7 +2,6 @@
 , buildPythonPackage
 , fetchPypi
 , darwin
-, mock
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pyGithub/default.nix b/pkgs/development/python-modules/pyGithub/default.nix
index 6adc1e7ec04c..be409e348ea3 100644
--- a/pkgs/development/python-modules/pyGithub/default.nix
+++ b/pkgs/development/python-modules/pyGithub/default.nix
@@ -1,5 +1,4 @@
 { stdenv, fetchFromGitHub
-, cacert
 , buildPythonPackage, python-jose, pyjwt }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pyaml/default.nix b/pkgs/development/python-modules/pyaml/default.nix
index 5fd1be7c15cc..fd1866d22f43 100644
--- a/pkgs/development/python-modules/pyaml/default.nix
+++ b/pkgs/development/python-modules/pyaml/default.nix
@@ -3,7 +3,6 @@
 , fetchPypi
 , pyyaml
 , unidecode
-, python
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pycaption/default.nix b/pkgs/development/python-modules/pycaption/default.nix
index 845630e514fa..d4ed6088409b 100644
--- a/pkgs/development/python-modules/pycaption/default.nix
+++ b/pkgs/development/python-modules/pycaption/default.nix
@@ -1,5 +1,5 @@
 { lib, fetchpatch
-, buildPythonPackage, fetchPypi, isPy3k, pythonOlder
+, buildPythonPackage, fetchPypi, isPy3k
 , beautifulsoup4, lxml, cssutils, future, enum34, six
 }:
 
diff --git a/pkgs/development/python-modules/pycollada/default.nix b/pkgs/development/python-modules/pycollada/default.nix
index b074f9f4934e..23ed4917cc58 100644
--- a/pkgs/development/python-modules/pycollada/default.nix
+++ b/pkgs/development/python-modules/pycollada/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchPypi, buildPythonPackage, numpy, isPy3k, dateutil }:
+{ stdenv, fetchPypi, buildPythonPackage, numpy, dateutil }:
 
 buildPythonPackage rec {
   pname = "pycollada";
diff --git a/pkgs/development/python-modules/pycrypto/default.nix b/pkgs/development/python-modules/pycrypto/default.nix
index af975e333f0f..e7858888d361 100644
--- a/pkgs/development/python-modules/pycrypto/default.nix
+++ b/pkgs/development/python-modules/pycrypto/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, buildPythonPackage, pycryptodome }:
+{ buildPythonPackage, pycryptodome }:
 
 # This is a dummy package providing the drop-in replacement pycryptodome.
 # https://github.com/NixOS/nixpkgs/issues/21671
diff --git a/pkgs/development/python-modules/pycryptodome/default.nix b/pkgs/development/python-modules/pycryptodome/default.nix
index b4ef42cb22ab..35041f8447ba 100644
--- a/pkgs/development/python-modules/pycryptodome/default.nix
+++ b/pkgs/development/python-modules/pycryptodome/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchPypi, python, buildPythonPackage, gmp }:
+{ stdenv, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   version = "3.6.2";
diff --git a/pkgs/development/python-modules/pygame/default.nix b/pkgs/development/python-modules/pygame/default.nix
index 5a4a81f13acc..b6c9ae5e8ba6 100644
--- a/pkgs/development/python-modules/pygame/default.nix
+++ b/pkgs/development/python-modules/pygame/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, buildPythonPackage, python, smpeg, libX11
+{ stdenv, lib, fetchurl, buildPythonPackage, python, libX11
 , SDL, SDL_image, SDL_mixer, SDL_ttf, libpng, libjpeg, portmidi, freetype
 }:
 
diff --git a/pkgs/development/python-modules/pygame_sdl2/default.nix b/pkgs/development/python-modules/pygame_sdl2/default.nix
index 08c266da6963..916bf7f692d2 100644
--- a/pkgs/development/python-modules/pygame_sdl2/default.nix
+++ b/pkgs/development/python-modules/pygame_sdl2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, pkgs, buildPythonPackage, fetchurl, isPy27, fetchpatch
+{ stdenv, buildPythonPackage, fetchurl, isPy27, fetchpatch
 , cython, SDL2, SDL2_image, SDL2_ttf, SDL2_mixer, libjpeg, libpng }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pygccxml/default.nix b/pkgs/development/python-modules/pygccxml/default.nix
index 5271677dc1ea..d4c46d6b8359 100644
--- a/pkgs/development/python-modules/pygccxml/default.nix
+++ b/pkgs/development/python-modules/pygccxml/default.nix
@@ -1,5 +1,5 @@
 { stdenv, castxml, fetchFromGitHub, buildPythonPackage,
-llvmPackages, clang }:
+llvmPackages }:
 buildPythonPackage rec {
   pname = "pygccxml";
   version = "1.9.1";
diff --git a/pkgs/development/python-modules/pygobject/3.nix b/pkgs/development/python-modules/pygobject/3.nix
index 524fb4af61c5..c6264f08de86 100644
--- a/pkgs/development/python-modules/pygobject/3.nix
+++ b/pkgs/development/python-modules/pygobject/3.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, buildPythonPackage, python, pkgconfig, glib, gobjectIntrospection, pycairo, cairo, which, ncurses}:
+{ stdenv, fetchurl, buildPythonPackage, pkgconfig, glib, gobjectIntrospection, pycairo, cairo, which, ncurses}:
 
 buildPythonPackage rec {
   major = "3.26";
diff --git a/pkgs/development/python-modules/pymc3/default.nix b/pkgs/development/python-modules/pymc3/default.nix
index a0dd6113b750..5af6ef992289 100644
--- a/pkgs/development/python-modules/pymc3/default.nix
+++ b/pkgs/development/python-modules/pymc3/default.nix
@@ -12,7 +12,6 @@
 , pytest
 , nose
 , parameterized
-, matplotlib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pymvglive/default.nix b/pkgs/development/python-modules/pymvglive/default.nix
index 1263c498a46b..3b7011fa7482 100644
--- a/pkgs/development/python-modules/pymvglive/default.nix
+++ b/pkgs/development/python-modules/pymvglive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests }:
+{ lib, buildPythonPackage, fetchPypi, requests }:
 
 buildPythonPackage rec {
   pname = "PyMVGLive";
diff --git a/pkgs/development/python-modules/pynacl/default.nix b/pkgs/development/python-modules/pynacl/default.nix
index bceb2b50cc59..463cd8044e1d 100644
--- a/pkgs/development/python-modules/pynacl/default.nix
+++ b/pkgs/development/python-modules/pynacl/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchFromGitHub, pytest, coverage, libsodium, cffi, six, hypothesis}:
+{ stdenv, buildPythonPackage, fetchFromGitHub, pytest, libsodium, cffi, six, hypothesis}:
 
 buildPythonPackage rec {
   pname = "pynacl";
diff --git a/pkgs/development/python-modules/pyogg/default.nix b/pkgs/development/python-modules/pyogg/default.nix
index 08fc87127959..09b7f3861303 100644
--- a/pkgs/development/python-modules/pyogg/default.nix
+++ b/pkgs/development/python-modules/pyogg/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchPypi, buildPythonPackage, fetchurl, libvorbis, flac, libogg, libopus, opusfile }:
+{ stdenv, lib, fetchPypi, buildPythonPackage, libvorbis, flac, libogg, libopus, opusfile }:
 
 buildPythonPackage rec {
     pname = "PyOgg";
diff --git a/pkgs/development/python-modules/pyowm/default.nix b/pkgs/development/python-modules/pyowm/default.nix
index 8175ef2b1725..55f96416efd4 100644
--- a/pkgs/development/python-modules/pyowm/default.nix
+++ b/pkgs/development/python-modules/pyowm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests }:
+{ lib, buildPythonPackage, fetchPypi, requests }:
 
 buildPythonPackage rec {
   pname = "pyowm";
diff --git a/pkgs/development/python-modules/pyqt/5.x.nix b/pkgs/development/python-modules/pyqt/5.x.nix
index ebad81f809b5..6a3e3e66e2c9 100644
--- a/pkgs/development/python-modules/pyqt/5.x.nix
+++ b/pkgs/development/python-modules/pyqt/5.x.nix
@@ -1,4 +1,4 @@
-{ lib, fetchurl, fetchpatch, pythonPackages, pkgconfig, makeWrapper
+{ lib, fetchurl, fetchpatch, pythonPackages, pkgconfig
 , qmake, lndir, qtbase, qtsvg, qtwebkit, qtwebengine, dbus
 , withWebSockets ? false, qtwebsockets
 , withConnectivity ? false, qtconnectivity
diff --git a/pkgs/development/python-modules/pysc2/default.nix b/pkgs/development/python-modules/pysc2/default.nix
index 89799988fa1f..280981ab2c24 100644
--- a/pkgs/development/python-modules/pysc2/default.nix
+++ b/pkgs/development/python-modules/pysc2/default.nix
@@ -4,7 +4,6 @@
 , absl-py
 , enum34
 , future
-, futures
 , mock
 , mpyq
 , numpy
diff --git a/pkgs/development/python-modules/pysdl2/default.nix b/pkgs/development/python-modules/pysdl2/default.nix
index 6681b1b199ad..1ffc546cfa1e 100644
--- a/pkgs/development/python-modules/pysdl2/default.nix
+++ b/pkgs/development/python-modules/pysdl2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchPypi, buildPythonPackage, fetchurl, SDL2, SDL2_ttf, SDL2_image, SDL2_gfx, SDL2_mixer, pyopengl }:
+{ stdenv, lib, fetchPypi, buildPythonPackage, SDL2, SDL2_ttf, SDL2_image, SDL2_gfx, SDL2_mixer }:
 
 buildPythonPackage rec {
   pname = "PySDL2";
diff --git a/pkgs/development/python-modules/pyside/default.nix b/pkgs/development/python-modules/pyside/default.nix
index 288b141d32e8..ab46c726f6c7 100644
--- a/pkgs/development/python-modules/pyside/default.nix
+++ b/pkgs/development/python-modules/pyside/default.nix
@@ -1,4 +1,4 @@
-{ lib, fetchurl, cmake, python, buildPythonPackage, pysideGeneratorrunner, pysideShiboken, qt4 }:
+{ lib, fetchurl, cmake, buildPythonPackage, pysideGeneratorrunner, pysideShiboken, qt4 }:
 
 # This derivation provides a Python module and should therefore be called via `python-packages.nix`.
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-cram/default.nix b/pkgs/development/python-modules/pytest-cram/default.nix
index 4555479af43e..3ca4f832c8cf 100644
--- a/pkgs/development/python-modules/pytest-cram/default.nix
+++ b/pkgs/development/python-modules/pytest-cram/default.nix
@@ -1,4 +1,4 @@
-{lib, buildPythonPackage, fetchPypi, pytest, cram, bash, writeText}:
+{lib, buildPythonPackage, fetchPypi, pytest, cram, bash}:
 
 buildPythonPackage rec {
   version = "0.2.0";
diff --git a/pkgs/development/python-modules/pytest-flake8/default.nix b/pkgs/development/python-modules/pytest-flake8/default.nix
index c2d205f2833c..101594750fd5 100644
--- a/pkgs/development/python-modules/pytest-flake8/default.nix
+++ b/pkgs/development/python-modules/pytest-flake8/default.nix
@@ -1,4 +1,4 @@
-{lib, buildPythonPackage, fetchPypi, fetchpatch, pytest, flake8}:
+{lib, buildPythonPackage, fetchPypi, pytest, flake8}:
 
 buildPythonPackage rec {
   pname = "pytest-flake8";
diff --git a/pkgs/development/python-modules/pytest-mock/default.nix b/pkgs/development/python-modules/pytest-mock/default.nix
index c12d4b8add03..163063ae57fc 100644
--- a/pkgs/development/python-modules/pytest-mock/default.nix
+++ b/pkgs/development/python-modules/pytest-mock/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, fetchpatch, isPy3k, pytest, mock, setuptools_scm }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, pytest, mock, setuptools_scm }:
 
 buildPythonPackage rec {
   pname = "pytest-mock";
diff --git a/pkgs/development/python-modules/pytest-xdist/default.nix b/pkgs/development/python-modules/pytest-xdist/default.nix
index 38d34a958545..84f337e1b83a 100644
--- a/pkgs/development/python-modules/pytest-xdist/default.nix
+++ b/pkgs/development/python-modules/pytest-xdist/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchPypi, buildPythonPackage, isPy3k, execnet, pytest, setuptools_scm, pytest-forked }:
+{ stdenv, fetchPypi, buildPythonPackage, execnet, pytest, setuptools_scm, pytest-forked }:
 
 buildPythonPackage rec {
   pname = "pytest-xdist";
diff --git a/pkgs/development/python-modules/python-oauth2/default.nix b/pkgs/development/python-modules/python-oauth2/default.nix
index f4d87dc035c1..e8c71bff18b2 100644
--- a/pkgs/development/python-modules/python-oauth2/default.nix
+++ b/pkgs/development/python-modules/python-oauth2/default.nix
@@ -1,5 +1,4 @@
 { lib
-, python
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pytorch/default.nix b/pkgs/development/python-modules/pytorch/default.nix
index 18162d105acf..962ebbecbaaa 100644
--- a/pkgs/development/python-modules/pytorch/default.nix
+++ b/pkgs/development/python-modules/pytorch/default.nix
@@ -1,7 +1,7 @@
 { buildPythonPackage, pythonOlder,
   cudaSupport ? false, cudatoolkit ? null, cudnn ? null,
-  fetchFromGitHub, fetchpatch, lib, numpy, pyyaml, cffi, typing, cmake,
-  stdenv, linkFarm, symlinkJoin,
+  fetchFromGitHub, lib, numpy, pyyaml, cffi, typing, cmake,
+  linkFarm, symlinkJoin,
   utillinux, which }:
 
 assert cudnn == null || cudatoolkit != null;
diff --git a/pkgs/development/python-modules/pywbem/default.nix b/pkgs/development/python-modules/pywbem/default.nix
index d09a9bbd6d80..159e0ce15fb4 100644
--- a/pkgs/development/python-modules/pywbem/default.nix
+++ b/pkgs/development/python-modules/pywbem/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchFromGitHub, fetchpatch, libxml2
+{ stdenv, buildPythonPackage, fetchFromGitHub, libxml2
 , m2crypto, ply, pyyaml, six
 , httpretty, lxml, mock, pytest, requests
 }:
diff --git a/pkgs/development/python-modules/pyxml/default.nix b/pkgs/development/python-modules/pyxml/default.nix
index 646308feece4..5a55c1f47bb2 100644
--- a/pkgs/development/python-modules/pyxml/default.nix
+++ b/pkgs/development/python-modules/pyxml/default.nix
@@ -1,4 +1,4 @@
-{lib, fetchurl, python, buildPythonPackage, makeWrapper}:
+{fetchurl, python, buildPythonPackage, makeWrapper}:
 
 buildPythonPackage rec {
   pname = "PyXML";
diff --git a/pkgs/development/python-modules/pyzmq/default.nix b/pkgs/development/python-modules/pyzmq/default.nix
index 26107ea3c4af..4de7777fa8b9 100644
--- a/pkgs/development/python-modules/pyzmq/default.nix
+++ b/pkgs/development/python-modules/pyzmq/default.nix
@@ -1,5 +1,4 @@
-{ lib
-, buildPythonPackage
+{ buildPythonPackage
 , fetchPypi
 , pytest
 , tornado
diff --git a/pkgs/development/python-modules/qiskit/default.nix b/pkgs/development/python-modules/qiskit/default.nix
index 1eda590a864f..dae43aa04624 100644
--- a/pkgs/development/python-modules/qiskit/default.nix
+++ b/pkgs/development/python-modules/qiskit/default.nix
@@ -2,8 +2,6 @@
 , isPy3k
 , buildPythonPackage
 , fetchPypi
-, fetchurl
-, python
 , numpy
 , scipy
 , sympy
diff --git a/pkgs/development/python-modules/rdflib/default.nix b/pkgs/development/python-modules/rdflib/default.nix
index cdbba1806735..badaf9b3787b 100644
--- a/pkgs/development/python-modules/rdflib/default.nix
+++ b/pkgs/development/python-modules/rdflib/default.nix
@@ -1,5 +1,4 @@
-{ lib
-, buildPythonPackage
+{ buildPythonPackage
 , fetchPypi
 , isodate
 , html5lib
diff --git a/pkgs/development/python-modules/redis/default.nix b/pkgs/development/python-modules/redis/default.nix
index de2683595e5f..6ea233f695bb 100644
--- a/pkgs/development/python-modules/redis/default.nix
+++ b/pkgs/development/python-modules/redis/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchPypi, buildPythonPackage }:
+{ fetchPypi, buildPythonPackage }:
 buildPythonPackage rec {
   pname = "redis";
   version = "2.10.6";
diff --git a/pkgs/development/python-modules/reportlab/default.nix b/pkgs/development/python-modules/reportlab/default.nix
index a356db74f07c..0b3e84c35128 100644
--- a/pkgs/development/python-modules/reportlab/default.nix
+++ b/pkgs/development/python-modules/reportlab/default.nix
@@ -1,9 +1,7 @@
-{ lib
-, buildPythonPackage
+{ buildPythonPackage
 , fetchPypi
 , freetype
 , pillow
-, pip
 , glibcLocales
 , python
 , isPyPy
diff --git a/pkgs/development/python-modules/requests-mock/default.nix b/pkgs/development/python-modules/requests-mock/default.nix
index 6bd294671dee..2286d9c2dc7f 100644
--- a/pkgs/development/python-modules/requests-mock/default.nix
+++ b/pkgs/development/python-modules/requests-mock/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, python
+{ buildPythonPackage, fetchPypi, python
 , mock, testrepository, testtools
 , requests, six }:
 
diff --git a/pkgs/development/python-modules/responses/default.nix b/pkgs/development/python-modules/responses/default.nix
index 4cc74431fc85..662045a9ce1e 100644
--- a/pkgs/development/python-modules/responses/default.nix
+++ b/pkgs/development/python-modules/responses/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi
+{ buildPythonPackage, fetchPypi
 , cookies, mock, requests, six }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/rhpl/default.nix b/pkgs/development/python-modules/rhpl/default.nix
index d9c879181765..ed0bf42ae687 100644
--- a/pkgs/development/python-modules/rhpl/default.nix
+++ b/pkgs/development/python-modules/rhpl/default.nix
@@ -1,4 +1,4 @@
-{stdenv, buildPythonPackage, fetchurl, rpmextract, python, wirelesstools, gettext}:
+{buildPythonPackage, fetchurl, rpmextract, python, wirelesstools, gettext}:
 
 buildPythonPackage rec {
   pname = "rhpl";
diff --git a/pkgs/development/python-modules/rubymarshal/default.nix b/pkgs/development/python-modules/rubymarshal/default.nix
index 7184795639c4..d8c43c1ea866 100644
--- a/pkgs/development/python-modules/rubymarshal/default.nix
+++ b/pkgs/development/python-modules/rubymarshal/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, python, hypothesis }:
+{ stdenv, buildPythonPackage, fetchPypi, hypothesis }:
 
 buildPythonPackage rec {
   pname = "rubymarshal";
diff --git a/pkgs/development/python-modules/salmon-mail/default.nix b/pkgs/development/python-modules/salmon-mail/default.nix
index ed358213492e..c642039d4fea 100644
--- a/pkgs/development/python-modules/salmon-mail/default.nix
+++ b/pkgs/development/python-modules/salmon-mail/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, pythonOlder, nose, dnspython
+{ stdenv, buildPythonPackage, fetchPypi, nose, dnspython
 ,  chardet, lmtpd, pythondaemon, six, jinja2, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/scikit-image/default.nix b/pkgs/development/python-modules/scikit-image/default.nix
index 6ac3ab5ddb9d..1a07e001caec 100644
--- a/pkgs/development/python-modules/scikit-image/default.nix
+++ b/pkgs/development/python-modules/scikit-image/default.nix
@@ -11,7 +11,6 @@
 , pywavelets
 , dask
 , cloudpickle
-, nose
 , pytest
 }:
 
diff --git a/pkgs/development/python-modules/scikitlearn/default.nix b/pkgs/development/python-modules/scikitlearn/default.nix
index edaf7cd90cc5..39af29da8145 100644
--- a/pkgs/development/python-modules/scikitlearn/default.nix
+++ b/pkgs/development/python-modules/scikitlearn/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchpatch, fetchPypi, python
+{ stdenv, buildPythonPackage, fetchPypi, python
 , nose, pillow
 , gfortran, glibcLocales
 , numpy, scipy
diff --git a/pkgs/development/python-modules/scipy/default.nix b/pkgs/development/python-modules/scipy/default.nix
index 5e57dd3f093d..41878b19d085 100644
--- a/pkgs/development/python-modules/scipy/default.nix
+++ b/pkgs/development/python-modules/scipy/default.nix
@@ -1,4 +1,4 @@
-{lib, fetchPypi, python, buildPythonPackage, isPyPy, gfortran, nose, pytest, numpy}:
+{lib, fetchPypi, python, buildPythonPackage, gfortran, nose, pytest, numpy}:
 
 buildPythonPackage rec {
   pname = "scipy";
diff --git a/pkgs/development/python-modules/serversyncstorage/default.nix b/pkgs/development/python-modules/serversyncstorage/default.nix
index 1cef1510ccf5..0e4b6cfa1e47 100644
--- a/pkgs/development/python-modules/serversyncstorage/default.nix
+++ b/pkgs/development/python-modules/serversyncstorage/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, buildPythonPackage
+{ buildPythonPackage
 , fetchgit
 , isPy27
 , testfixtures
diff --git a/pkgs/development/python-modules/smart_open/default.nix b/pkgs/development/python-modules/smart_open/default.nix
index 006f52f1d38b..8c66df80dc58 100644
--- a/pkgs/development/python-modules/smart_open/default.nix
+++ b/pkgs/development/python-modules/smart_open/default.nix
@@ -1,6 +1,5 @@
 { lib
 , buildPythonPackage
-, isPy3k
 , fetchPypi
 , boto
 , boto3
diff --git a/pkgs/development/python-modules/spacy/default.nix b/pkgs/development/python-modules/spacy/default.nix
index 16c1841a3d62..d2a306356b6d 100644
--- a/pkgs/development/python-modules/spacy/default.nix
+++ b/pkgs/development/python-modules/spacy/default.nix
@@ -1,7 +1,5 @@
 { lib
-, pkgs
 , buildPythonPackage
-, python
 , fetchPypi
 , pythonOlder
 , html5lib
diff --git a/pkgs/development/python-modules/sqlalchemy/default.nix b/pkgs/development/python-modules/sqlalchemy/default.nix
index 211419f86b1b..50d58877b7ea 100644
--- a/pkgs/development/python-modules/sqlalchemy/default.nix
+++ b/pkgs/development/python-modules/sqlalchemy/default.nix
@@ -3,7 +3,6 @@
 , buildPythonPackage
 , pytest
 , mock
-, pytest_xdist
 , isPy3k
 , pysqlite
 }:
diff --git a/pkgs/development/python-modules/sseclient/default.nix b/pkgs/development/python-modules/sseclient/default.nix
index 9ac04e18e4f6..a122a0c40ec8 100644
--- a/pkgs/development/python-modules/sseclient/default.nix
+++ b/pkgs/development/python-modules/sseclient/default.nix
@@ -1,6 +1,6 @@
 { stdenv, buildPythonPackage, fetchPypi
 , requests, six
-, backports_unittest-mock, pluggy, pytest, pytestrunner }:
+, backports_unittest-mock, pytest, pytestrunner }:
 
 buildPythonPackage rec {
   pname = "sseclient";
diff --git a/pkgs/development/python-modules/syncserver/default.nix b/pkgs/development/python-modules/syncserver/default.nix
index 3c650bd60dda..7a93d64a89f5 100644
--- a/pkgs/development/python-modules/syncserver/default.nix
+++ b/pkgs/development/python-modules/syncserver/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, buildPythonPackage
+{ buildPythonPackage
 , fetchgit
 , isPy27
 , unittest2
diff --git a/pkgs/development/python-modules/tempora/default.nix b/pkgs/development/python-modules/tempora/default.nix
index c56a5d7889f6..9f8087a305d9 100644
--- a/pkgs/development/python-modules/tempora/default.nix
+++ b/pkgs/development/python-modules/tempora/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi
+{ buildPythonPackage, fetchPypi
 , setuptools_scm
 , six, pytz}:
 
diff --git a/pkgs/development/python-modules/tensorflow/bin.nix b/pkgs/development/python-modules/tensorflow/bin.nix
index 21b21f174d0b..4e3621157f93 100644
--- a/pkgs/development/python-modules/tensorflow/bin.nix
+++ b/pkgs/development/python-modules/tensorflow/bin.nix
@@ -2,7 +2,7 @@
 , lib
 , fetchurl
 , buildPythonPackage
-, isPy3k, isPy35, isPy36, pythonOlder
+, isPy3k, isPy36, pythonOlder
 , astor
 , gast
 , numpy
diff --git a/pkgs/development/python-modules/testfixtures/default.nix b/pkgs/development/python-modules/testfixtures/default.nix
index 628be2e946af..1e35d95c5e1f 100644
--- a/pkgs/development/python-modules/testfixtures/default.nix
+++ b/pkgs/development/python-modules/testfixtures/default.nix
@@ -1,5 +1,5 @@
 { stdenv, buildPythonPackage, fetchPypi
-, mock, manuel, pytest, sybil, zope_component, django }:
+, mock, manuel, pytest, sybil, zope_component }:
 
 buildPythonPackage rec {
   pname = "testfixtures";
diff --git a/pkgs/development/python-modules/textacy/default.nix b/pkgs/development/python-modules/textacy/default.nix
index d42430248216..9b22ad3e5456 100644
--- a/pkgs/development/python-modules/textacy/default.nix
+++ b/pkgs/development/python-modules/textacy/default.nix
@@ -4,7 +4,6 @@
 , fetchPypi
 , cachetools
 , cld2-cffi
-, cython
 , cytoolz
 , ftfy
 , ijson
diff --git a/pkgs/development/python-modules/thespian/default.nix b/pkgs/development/python-modules/thespian/default.nix
index 0ffaf315d54b..0ced52c7ba10 100644
--- a/pkgs/development/python-modules/thespian/default.nix
+++ b/pkgs/development/python-modules/thespian/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchPypi, buildPythonPackage, lib }:
+{ fetchPypi, buildPythonPackage, lib }:
 
 buildPythonPackage rec {
   version = "3.9.2";
diff --git a/pkgs/development/python-modules/thinc/default.nix b/pkgs/development/python-modules/thinc/default.nix
index b58128200238..88e6c8d16742 100644
--- a/pkgs/development/python-modules/thinc/default.nix
+++ b/pkgs/development/python-modules/thinc/default.nix
@@ -1,6 +1,5 @@
 { stdenv
 , lib
-, pkgs
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
@@ -11,7 +10,6 @@
 , msgpack-python
 , preshed
 , numpy
-, python
 , murmurhash
 , pathlib
 , hypothesis
diff --git a/pkgs/development/python-modules/tiros/default.nix b/pkgs/development/python-modules/tiros/default.nix
index b55c42cfa561..edc4bbdebb13 100644
--- a/pkgs/development/python-modules/tiros/default.nix
+++ b/pkgs/development/python-modules/tiros/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchPypi, buildPythonPackage
+{ fetchPypi, buildPythonPackage
 , semantic-version, boto3, flask, docutils, requests
 }:
 
diff --git a/pkgs/development/python-modules/todoist/default.nix b/pkgs/development/python-modules/todoist/default.nix
index 829d7bcfcb2b..6f3eae60c635 100644
--- a/pkgs/development/python-modules/todoist/default.nix
+++ b/pkgs/development/python-modules/todoist/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchPypi, python, buildPythonPackage
+{ stdenv, fetchPypi, buildPythonPackage
 , requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/tokenserver/default.nix b/pkgs/development/python-modules/tokenserver/default.nix
index c6efe5ba2397..44fcb9b46ff9 100644
--- a/pkgs/development/python-modules/tokenserver/default.nix
+++ b/pkgs/development/python-modules/tokenserver/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, buildPythonPackage
+{ buildPythonPackage
 , fetchgit
 , testfixtures
 , cornice
diff --git a/pkgs/development/python-modules/tox/default.nix b/pkgs/development/python-modules/tox/default.nix
index 359f13e2a00b..4ceeb026634c 100644
--- a/pkgs/development/python-modules/tox/default.nix
+++ b/pkgs/development/python-modules/tox/default.nix
@@ -1,5 +1,4 @@
-{ lib
-, buildPythonPackage
+{ buildPythonPackage
 , fetchPypi
 , py
 , virtualenv
diff --git a/pkgs/development/python-modules/tqdm/default.nix b/pkgs/development/python-modules/tqdm/default.nix
index 87fa393ce5e3..0b77f7068012 100644
--- a/pkgs/development/python-modules/tqdm/default.nix
+++ b/pkgs/development/python-modules/tqdm/default.nix
@@ -5,8 +5,6 @@
 , coverage
 , glibcLocales
 , flake8
-, matplotlib
-, pandas
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/typed-ast/default.nix b/pkgs/development/python-modules/typed-ast/default.nix
index 0cfc8c3e14a9..5bd0f5f81d2b 100644
--- a/pkgs/development/python-modules/typed-ast/default.nix
+++ b/pkgs/development/python-modules/typed-ast/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, isPy3k, lib, pythonOlder }:
+{ buildPythonPackage, fetchPypi, lib, pythonOlder }:
 buildPythonPackage rec {
   pname = "typed-ast";
   version = "1.1.0";
diff --git a/pkgs/development/python-modules/tzlocal/default.nix b/pkgs/development/python-modules/tzlocal/default.nix
index 3bb75fb2ac29..8320500fc141 100644
--- a/pkgs/development/python-modules/tzlocal/default.nix
+++ b/pkgs/development/python-modules/tzlocal/default.nix
@@ -1,5 +1,5 @@
 { stdenv, buildPythonPackage, fetchPypi
-, tzlocal, pytz }:
+, pytz }:
 
 buildPythonPackage rec {
   pname = "tzlocal";
diff --git a/pkgs/development/python-modules/ukpostcodeparser/default.nix b/pkgs/development/python-modules/ukpostcodeparser/default.nix
index 235f33da5994..42588347c851 100644
--- a/pkgs/development/python-modules/ukpostcodeparser/default.nix
+++ b/pkgs/development/python-modules/ukpostcodeparser/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "UkPostcodeParser";
diff --git a/pkgs/development/python-modules/uranium/default.nix b/pkgs/development/python-modules/uranium/default.nix
index 276ed481601c..eb2fa2bd042d 100644
--- a/pkgs/development/python-modules/uranium/default.nix
+++ b/pkgs/development/python-modules/uranium/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, python, cmake
+{ stdenv, buildPythonPackage, fetchFromGitHub, python, cmake
 , pyqt5, numpy, scipy, libarcus, doxygen, gettext, pythonOlder }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/vcrpy/default.nix b/pkgs/development/python-modules/vcrpy/default.nix
index ab4ce1be2b1a..805941cab60d 100644
--- a/pkgs/development/python-modules/vcrpy/default.nix
+++ b/pkgs/development/python-modules/vcrpy/default.nix
@@ -7,7 +7,6 @@
 , contextlib2
 , wrapt
 , pytest
-, httpbin
 , pytest-httpbin
 , yarl
 , pythonOlder
diff --git a/pkgs/development/python-modules/warrant/default.nix b/pkgs/development/python-modules/warrant/default.nix
index c152271af335..ef6089baa507 100644
--- a/pkgs/development/python-modules/warrant/default.nix
+++ b/pkgs/development/python-modules/warrant/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchFromGitHub, fetchPypi, fetchpatch
+{ lib, buildPythonPackage, fetchFromGitHub, fetchpatch
 , mock
 , boto3, envs, python-jose, requests }:
 
diff --git a/pkgs/development/python-modules/wptserve/default.nix b/pkgs/development/python-modules/wptserve/default.nix
index b2ce75c43c3a..32145623e4da 100644
--- a/pkgs/development/python-modules/wptserve/default.nix
+++ b/pkgs/development/python-modules/wptserve/default.nix
@@ -1,5 +1,4 @@
 { lib
-, stdenv
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/wsproto/default.nix b/pkgs/development/python-modules/wsproto/default.nix
index e98fcf205fd5..c3ac5b51cb0f 100644
--- a/pkgs/development/python-modules/wsproto/default.nix
+++ b/pkgs/development/python-modules/wsproto/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, h11, enum34 }:
+{ buildPythonPackage, fetchPypi, h11, enum34 }:
 
 buildPythonPackage rec {
   pname = "wsproto";
diff --git a/pkgs/development/python-modules/xarray/default.nix b/pkgs/development/python-modules/xarray/default.nix
index 039a751a5e14..a9041f9a76f7 100644
--- a/pkgs/development/python-modules/xarray/default.nix
+++ b/pkgs/development/python-modules/xarray/default.nix
@@ -5,7 +5,6 @@
 , numpy
 , pandas
 , python
-, fetchurl
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/zeep/default.nix b/pkgs/development/python-modules/zeep/default.nix
index 418fcebaefd5..f283479c8de8 100644
--- a/pkgs/development/python-modules/zeep/default.nix
+++ b/pkgs/development/python-modules/zeep/default.nix
@@ -19,7 +19,6 @@
 , pytest
 , pytestcov
 , requests-mock
-, testtools
 , tornado
 }:
 
diff --git a/pkgs/development/python-modules/zodb/default.nix b/pkgs/development/python-modules/zodb/default.nix
index 9aab2ba9e844..c23f332638d0 100644
--- a/pkgs/development/python-modules/zodb/default.nix
+++ b/pkgs/development/python-modules/zodb/default.nix
@@ -1,7 +1,6 @@
 { stdenv
 , fetchPypi
 , buildPythonPackage
-, isPy3k
 , zope_testrunner
 , transaction
 , six
diff --git a/pkgs/development/python-modules/zope_testrunner/default.nix b/pkgs/development/python-modules/zope_testrunner/default.nix
index e2bf3a569d04..a4988332b226 100644
--- a/pkgs/development/python-modules/zope_testrunner/default.nix
+++ b/pkgs/development/python-modules/zope_testrunner/default.nix
@@ -1,7 +1,6 @@
 { stdenv
 , buildPythonPackage
 , fetchPypi
-, fetchpatch
 , zope_interface
 , zope_exceptions
 , zope_testing
diff --git a/pkgs/development/r-modules/default.nix b/pkgs/development/r-modules/default.nix
index 68ab42a76dd7..acaee897d937 100644
--- a/pkgs/development/r-modules/default.nix
+++ b/pkgs/development/r-modules/default.nix
@@ -47,11 +47,11 @@ let
                                              "mirror://bioc/${biocVersion}/bioc/src/contrib/Archive/${name}_${version}.tar.gz" ];
   };
   deriveBiocAnn = mkDerive {
-    mkHomepage = {name, biocVersion}: "http://www.bioconductor.org/packages/${name}.html";
+    mkHomepage = {name}: "http://www.bioconductor.org/packages/${name}.html";
     mkUrls = {name, version, biocVersion}: [ "mirror://bioc/${biocVersion}/data/annotation/src/contrib/${name}_${version}.tar.gz" ];
   };
   deriveBiocExp = mkDerive {
-    mkHomepage = {name, biocVersion}: "http://www.bioconductor.org/packages/${name}.html";
+    mkHomepage = {name}: "http://www.bioconductor.org/packages/${name}.html";
     mkUrls = {name, version, biocVersion}: [ "mirror://bioc/${biocVersion}/data/experiment/src/contrib/${name}_${version}.tar.gz" ];
   };
   deriveCran = mkDerive {
diff --git a/pkgs/development/ruby-modules/bundler/default.nix b/pkgs/development/ruby-modules/bundler/default.nix
index 2f9a82238325..b1d0b76f086c 100644
--- a/pkgs/development/ruby-modules/bundler/default.nix
+++ b/pkgs/development/ruby-modules/bundler/default.nix
@@ -1,4 +1,4 @@
-{ buildRubyGem, makeWrapper, ruby, coreutils }:
+{ buildRubyGem, ruby }:
 
 buildRubyGem rec {
   inherit ruby;
diff --git a/pkgs/development/tools/analysis/qcachegrind/default.nix b/pkgs/development/tools/analysis/qcachegrind/default.nix
index 30d82aca83ae..fb0f7414841c 100644
--- a/pkgs/development/tools/analysis/qcachegrind/default.nix
+++ b/pkgs/development/tools/analysis/qcachegrind/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, cmake, qmake, qtbase, perl, python, php, kcachegrind, fetchpatch }:
+{ stdenv, qmake, qtbase, perl, python, php, kcachegrind }:
 
 let
   name = stdenv.lib.replaceStrings ["kcachegrind"] ["qcachegrind"] kcachegrind.name;
diff --git a/pkgs/development/tools/analysis/radare/default.nix b/pkgs/development/tools/analysis/radare/default.nix
index b174d6c069b7..b9b9b8abfb92 100644
--- a/pkgs/development/tools/analysis/radare/default.nix
+++ b/pkgs/development/tools/analysis/radare/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, pkgconfig, libusb, readline, lua, libewf, perl,
+{stdenv, fetchurl, pkgconfig, libusb, readline, lua, perl,
 gtk2 ? null, vte ? null, gtkdialog ? null,
 python ? null,
 ruby ? null,
diff --git a/pkgs/development/tools/analysis/valgrind/default.nix b/pkgs/development/tools/analysis/valgrind/default.nix
index 131533896ff9..cbcfa981b6b5 100644
--- a/pkgs/development/tools/analysis/valgrind/default.nix
+++ b/pkgs/development/tools/analysis/valgrind/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, perl, gdb, llvm, cctools, xnu, bootstrap_cmds }:
+{ stdenv, fetchurl, perl, gdb, llvm, cctools, xnu, bootstrap_cmds }:
 
 stdenv.mkDerivation rec {
   name = "valgrind-3.13.0";
diff --git a/pkgs/development/tools/backblaze-b2/default.nix b/pkgs/development/tools/backblaze-b2/default.nix
index 5bda2d945eb6..19609e15c765 100644
--- a/pkgs/development/tools/backblaze-b2/default.nix
+++ b/pkgs/development/tools/backblaze-b2/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonApplication, fetchFromGitHub, makeWrapper
+{ lib, buildPythonApplication, fetchFromGitHub
 , arrow, futures, logfury, requests, six, tqdm
 }:
 
diff --git a/pkgs/development/tools/bloaty/default.nix b/pkgs/development/tools/bloaty/default.nix
index 953a10ca47ab..5f2e9b5f440d 100644
--- a/pkgs/development/tools/bloaty/default.nix
+++ b/pkgs/development/tools/bloaty/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, binutils, cmake, zlib, fetchFromGitHub }:
+{ stdenv, cmake, zlib, fetchFromGitHub }:
 
 stdenv.mkDerivation rec {
   version = "2018-06-15";
diff --git a/pkgs/development/tools/build-managers/buck/default.nix b/pkgs/development/tools/build-managers/buck/default.nix
index 5d486f47844e..e64bf432b38b 100644
--- a/pkgs/development/tools/build-managers/buck/default.nix
+++ b/pkgs/development/tools/build-managers/buck/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, jdk, ant, python2, python2Packages, watchman, unzip, bash, makeWrapper }:
+{ stdenv, fetchFromGitHub, jdk, ant, python2, python2Packages, watchman, bash, makeWrapper }:
 
 stdenv.mkDerivation rec {
   name = "buck-${version}";
diff --git a/pkgs/development/tools/build-managers/buildbot/default.nix b/pkgs/development/tools/build-managers/buildbot/default.nix
index 3729abfe247d..adb279cdea68 100644
--- a/pkgs/development/tools/build-managers/buildbot/default.nix
+++ b/pkgs/development/tools/build-managers/buildbot/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, openssh, buildbot-worker, buildbot-pkg, pythonPackages, runCommand, makeWrapper }:
+{ stdenv, openssh, buildbot-worker, buildbot-pkg, pythonPackages, runCommand, makeWrapper }:
 
 let
   withPlugins = plugins: runCommand "wrapped-${package.name}" {
diff --git a/pkgs/development/tools/build-managers/cmake/2.8.nix b/pkgs/development/tools/build-managers/cmake/2.8.nix
index f6da92fe6219..c61bf3287db1 100644
--- a/pkgs/development/tools/build-managers/cmake/2.8.nix
+++ b/pkgs/development/tools/build-managers/cmake/2.8.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, replace, curl, expat, zlib, bzip2
+{ stdenv, fetchurl, fetchpatch, curl, expat, zlib, bzip2
 , useNcurses ? false, ncurses, useQt4 ? false, qt4, ps
 , buildPlatform, hostPlatform
 }:
diff --git a/pkgs/development/tools/build-managers/conan/default.nix b/pkgs/development/tools/build-managers/conan/default.nix
index 9ff32f1b3484..e77647b2fed4 100644
--- a/pkgs/development/tools/build-managers/conan/default.nix
+++ b/pkgs/development/tools/build-managers/conan/default.nix
@@ -1,4 +1,4 @@
-{ lib, fetchpatch, python }:
+{ lib, python }:
 
 let newPython = python.override {
   packageOverrides = self: super: {
diff --git a/pkgs/development/tools/build-managers/dub/default.nix b/pkgs/development/tools/build-managers/dub/default.nix
index 52e29acc9d81..b9a8c97bd5eb 100644
--- a/pkgs/development/tools/build-managers/dub/default.nix
+++ b/pkgs/development/tools/build-managers/dub/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, curl, dmd, libevent, rsync }:
+{ stdenv, fetchFromGitHub, curl, dmd, libevent, rsync }:
 
 let
 
diff --git a/pkgs/development/tools/build-managers/meson/default.nix b/pkgs/development/tools/build-managers/meson/default.nix
index f14f6adf5fef..3cb906d50edf 100644
--- a/pkgs/development/tools/build-managers/meson/default.nix
+++ b/pkgs/development/tools/build-managers/meson/default.nix
@@ -1,4 +1,4 @@
-{ lib, python3Packages, stdenv, ninja, pkgconfig, targetPlatform, writeTextDir, substituteAll }: let
+{ lib, python3Packages, stdenv, targetPlatform, writeTextDir, substituteAll }: let
   targetPrefix = lib.optionalString stdenv.isCross
                    (targetPlatform.config + "-");
 in python3Packages.buildPythonApplication rec {
diff --git a/pkgs/development/tools/build-managers/nant/default.nix b/pkgs/development/tools/build-managers/nant/default.nix
index 5da32f2334a7..c394d87e09ec 100644
--- a/pkgs/development/tools/build-managers/nant/default.nix
+++ b/pkgs/development/tools/build-managers/nant/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, fetchFromGitHub, pkgconfig, mono, makeWrapper
+{ stdenv, fetchFromGitHub, pkgconfig, mono, makeWrapper
 , targetVersion ? "4.5" }:
 
 let
diff --git a/pkgs/development/tools/build-managers/pants/default.nix b/pkgs/development/tools/build-managers/pants/default.nix
index 38a197aa900b..1ad52f327e15 100644
--- a/pkgs/development/tools/build-managers/pants/default.nix
+++ b/pkgs/development/tools/build-managers/pants/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, pythonPackages, runCommand, curl }:
+{ stdenv, pythonPackages }:
 
 with stdenv.lib;
 with pythonPackages;
diff --git a/pkgs/development/tools/build-managers/rebar3/default.nix b/pkgs/development/tools/build-managers/rebar3/default.nix
index ff6dc07ea9e9..d9e260a13de3 100644
--- a/pkgs/development/tools/build-managers/rebar3/default.nix
+++ b/pkgs/development/tools/build-managers/rebar3/default.nix
@@ -1,6 +1,6 @@
-{ stdenv, writeText, callPackage, fetchurl,
+{ stdenv, fetchurl,
   fetchHex, erlang, hermeticRebar3 ? true,
-  tree, fetchFromGitHub, hexRegistrySnapshot }:
+  tree, hexRegistrySnapshot }:
 
 let
   version = "3.6.1";
diff --git a/pkgs/development/tools/build-managers/scons/common.nix b/pkgs/development/tools/build-managers/scons/common.nix
index d3842a39f18b..4b0242a3956d 100644
--- a/pkgs/development/tools/build-managers/scons/common.nix
+++ b/pkgs/development/tools/build-managers/scons/common.nix
@@ -1,6 +1,6 @@
 { version, sha256 }:
 
-{ stdenv, fetchurl, fetchpatch, python2Packages }:
+{ stdenv, fetchurl, python2Packages }:
 
 let name = "scons";
 in python2Packages.buildPythonApplication {
diff --git a/pkgs/development/tools/build-managers/scons/default.nix b/pkgs/development/tools/build-managers/scons/default.nix
index f52d53526fa1..3bd31523412a 100644
--- a/pkgs/development/tools/build-managers/scons/default.nix
+++ b/pkgs/development/tools/build-managers/scons/default.nix
@@ -1,4 +1,4 @@
-{ callPackage, stdenv }:
+{ callPackage }:
 
 let
   mkScons = args: callPackage (import ./common.nix args) { };
diff --git a/pkgs/development/tools/build-managers/waf/default.nix b/pkgs/development/tools/build-managers/waf/default.nix
index 000943f117f6..e86d61cf6c9a 100644
--- a/pkgs/development/tools/build-managers/waf/default.nix
+++ b/pkgs/development/tools/build-managers/waf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2 }:
+{ stdenv, fetchurl, python2 }:
 
 stdenv.mkDerivation rec {
   name = "waf-${version}";
diff --git a/pkgs/development/tools/buildah/default.nix b/pkgs/development/tools/buildah/default.nix
index 2dca2b6cd423..95ee4e93f2a8 100644
--- a/pkgs/development/tools/buildah/default.nix
+++ b/pkgs/development/tools/buildah/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub, runCommand
+{ stdenv, buildGoPackage, fetchFromGitHub
 , gpgme, libgpgerror, lvm2, btrfs-progs, pkgconfig, ostree, libselinux, libseccomp
 , go-md2man }:
 
diff --git a/pkgs/development/tools/castxml/default.nix b/pkgs/development/tools/castxml/default.nix
index f42adffc5f42..603b155ee4f9 100644
--- a/pkgs/development/tools/castxml/default.nix
+++ b/pkgs/development/tools/castxml/default.nix
@@ -1,6 +1,5 @@
 { stdenv, fetchFromGitHub
 , pythonPackages
-, pkgconfig
 , cmake
 , llvmPackages
 , withMan ? true
diff --git a/pkgs/development/tools/chefdk/default.nix b/pkgs/development/tools/chefdk/default.nix
index df06793eaec0..1d81d469eb29 100644
--- a/pkgs/development/tools/chefdk/default.nix
+++ b/pkgs/development/tools/chefdk/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, bundlerEnv, ruby_2_4, perl, autoconf }:
+{ lib, bundlerEnv, ruby_2_4, perl, autoconf }:
 
 bundlerEnv {
   # Last updated via:
diff --git a/pkgs/development/tools/compass/default.nix b/pkgs/development/tools/compass/default.nix
index f96d3e810ca5..3e3e239fbfb3 100644
--- a/pkgs/development/tools/compass/default.nix
+++ b/pkgs/development/tools/compass/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, bundlerEnv, ruby }:
+{ lib, bundlerEnv, ruby }:
 
 bundlerEnv {
   name = "compass-1.0.3";
diff --git a/pkgs/development/tools/container-linux-config-transpiler/default.nix b/pkgs/development/tools/container-linux-config-transpiler/default.nix
index 8d43736d3a8a..b2b903b095c6 100644
--- a/pkgs/development/tools/container-linux-config-transpiler/default.nix
+++ b/pkgs/development/tools/container-linux-config-transpiler/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 
 with lib;
 
diff --git a/pkgs/development/tools/database/liquibase/default.nix b/pkgs/development/tools/database/liquibase/default.nix
index 7f66317167a5..46104e78d1d7 100644
--- a/pkgs/development/tools/database/liquibase/default.nix
+++ b/pkgs/development/tools/database/liquibase/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, writeText, jre, makeWrapper, fetchMavenArtifact
+{ stdenv, fetchurl, jre, makeWrapper
 , mysqlSupport ? true, mysql_jdbc ? null }:
 
 assert mysqlSupport -> mysql_jdbc != null;
diff --git a/pkgs/development/tools/delve/default.nix b/pkgs/development/tools/delve/default.nix
index 9a7a600d1343..b101e52aad9c 100644
--- a/pkgs/development/tools/delve/default.nix
+++ b/pkgs/development/tools/delve/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "delve-${version}";
diff --git a/pkgs/development/tools/devpi-client/default.nix b/pkgs/development/tools/devpi-client/default.nix
index 905314efe5a9..26d96a641263 100644
--- a/pkgs/development/tools/devpi-client/default.nix
+++ b/pkgs/development/tools/devpi-client/default.nix
@@ -1,5 +1,4 @@
 { stdenv
-, lib
 , pythonPackages
 , glibcLocales
 , devpi-server
diff --git a/pkgs/development/tools/devpi-server/default.nix b/pkgs/development/tools/devpi-server/default.nix
index 6823ae3372cb..f3ade82e52e8 100644
--- a/pkgs/development/tools/devpi-server/default.nix
+++ b/pkgs/development/tools/devpi-server/default.nix
@@ -1,4 +1,4 @@
- { stdenv, pythonPackages, glibcLocales, nginx }:
+ { stdenv, pythonPackages, nginx }:
 
 pythonPackages.buildPythonApplication rec {
   name = "${pname}-${version}";
diff --git a/pkgs/development/tools/documentation/gnome-doc-utils/default.nix b/pkgs/development/tools/documentation/gnome-doc-utils/default.nix
index f6920a83e09c..7e8a41590724 100644
--- a/pkgs/development/tools/documentation/gnome-doc-utils/default.nix
+++ b/pkgs/development/tools/documentation/gnome-doc-utils/default.nix
@@ -1,5 +1,5 @@
-{stdenv, fetchurl, pkgconfig, libxml2Python, libxslt, intltool
-, makeWrapper, python2Packages }:
+{fetchurl, pkgconfig, libxml2Python, libxslt, intltool
+, python2Packages }:
 
 python2Packages.buildPythonApplication {
   name = "gnome-doc-utils-0.20.10";
diff --git a/pkgs/development/tools/easyjson/default.nix b/pkgs/development/tools/easyjson/default.nix
index 253f5b374d3c..de9fb82f66f2 100644
--- a/pkgs/development/tools/easyjson/default.nix
+++ b/pkgs/development/tools/easyjson/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v1.2.1
-{ stdenv, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "easyjson-unstable-${version}";
diff --git a/pkgs/development/tools/egg2nix/chicken-eggs.nix b/pkgs/development/tools/egg2nix/chicken-eggs.nix
index 4ec9e0daa47a..1f786f127c91 100644
--- a/pkgs/development/tools/egg2nix/chicken-eggs.nix
+++ b/pkgs/development/tools/egg2nix/chicken-eggs.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv }:
+{ pkgs }:
 rec {
   inherit (pkgs) eggDerivation fetchegg;
 
diff --git a/pkgs/development/tools/electron/default.nix b/pkgs/development/tools/electron/default.nix
index 38432e58d0d9..695a532305a9 100644
--- a/pkgs/development/tools/electron/default.nix
+++ b/pkgs/development/tools/electron/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, libXScrnSaver, makeWrapper, fetchurl, unzip, atomEnv, gtk2 }:
+{ stdenv, libXScrnSaver, makeWrapper, fetchurl, unzip, atomEnv, gtk2 }:
 
 let
   version = "1.8.2";
diff --git a/pkgs/development/tools/erlang/hex2nix/default.nix b/pkgs/development/tools/erlang/hex2nix/default.nix
index 082edb37a4f3..e21749f90d02 100644
--- a/pkgs/development/tools/erlang/hex2nix/default.nix
+++ b/pkgs/development/tools/erlang/hex2nix/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, buildRebar3, buildHex,
+{ fetchFromGitHub, buildRebar3,
 
   # Erlang dependencies:
   ibrowse_4_2_2,
diff --git a/pkgs/development/tools/erlang/relx-exe/default.nix b/pkgs/development/tools/erlang/relx-exe/default.nix
index df14c29c3728..9bbdc8c8334d 100644
--- a/pkgs/development/tools/erlang/relx-exe/default.nix
+++ b/pkgs/development/tools/erlang/relx-exe/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, beamPackages, buildRebar3, buildHex, fetchHex
+{ stdenv, buildHex
 
 , getopt_0_8_2, erlware_commons_1_0_0, cf_0_2_2 }:
 
diff --git a/pkgs/development/tools/fac/default.nix b/pkgs/development/tools/fac/default.nix
index d6cc527e6418..18367d14f6e5 100644
--- a/pkgs/development/tools/fac/default.nix
+++ b/pkgs/development/tools/fac/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildGoPackage, fetchFromGitHub, fetchurl, makeWrapper, git }:
+{ stdenv, buildGoPackage, fetchFromGitHub, makeWrapper, git }:
 
 buildGoPackage rec {
   name = "fac-${version}";
diff --git a/pkgs/development/tools/git-ftp/default.nix b/pkgs/development/tools/git-ftp/default.nix
index 3d4d542d2f92..4c67a45d8c30 100644
--- a/pkgs/development/tools/git-ftp/default.nix
+++ b/pkgs/development/tools/git-ftp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pandoc, man }:
+{ stdenv, fetchFromGitHub, pandoc, man }:
 stdenv.mkDerivation rec {
   name = "git-ftp-${version}";
   version = "1.5.1";
diff --git a/pkgs/development/tools/go-bindata/default.nix b/pkgs/development/tools/go-bindata/default.nix
index 4b87e74a6308..9a783deecee6 100644
--- a/pkgs/development/tools/go-bindata/default.nix
+++ b/pkgs/development/tools/go-bindata/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "go-bindata-${version}";
diff --git a/pkgs/development/tools/go-outline/default.nix b/pkgs/development/tools/go-outline/default.nix
index fe159c85c3d6..5e1cd03e0af5 100644
--- a/pkgs/development/tools/go-outline/default.nix
+++ b/pkgs/development/tools/go-outline/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "go-outline-${version}";
diff --git a/pkgs/development/tools/go-repo-root/default.nix b/pkgs/development/tools/go-repo-root/default.nix
index e47b84354d62..52cd37f98850 100644
--- a/pkgs/development/tools/go-repo-root/default.nix
+++ b/pkgs/development/tools/go-repo-root/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, gotools, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "go-repo-root-${version}";
diff --git a/pkgs/development/tools/go-symbols/default.nix b/pkgs/development/tools/go-symbols/default.nix
index 9a8b592b038d..38ceea7d417b 100644
--- a/pkgs/development/tools/go-symbols/default.nix
+++ b/pkgs/development/tools/go-symbols/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchgit }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "go-symbols-${version}";
diff --git a/pkgs/development/tools/gocode/default.nix b/pkgs/development/tools/gocode/default.nix
index 2501c36dd5cd..a20e1658988c 100644
--- a/pkgs/development/tools/gocode/default.nix
+++ b/pkgs/development/tools/gocode/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "gocode-${version}";
diff --git a/pkgs/development/tools/goconvey/default.nix b/pkgs/development/tools/goconvey/default.nix
index e4ef9d26da25..fcdb56460e19 100644
--- a/pkgs/development/tools/goconvey/default.nix
+++ b/pkgs/development/tools/goconvey/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "goconvey-${version}";
diff --git a/pkgs/development/tools/godef/default.nix b/pkgs/development/tools/godef/default.nix
index 6644c8fcfc4f..3227ed8eec2e 100644
--- a/pkgs/development/tools/godef/default.nix
+++ b/pkgs/development/tools/godef/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchgit }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "godef-${version}";
diff --git a/pkgs/development/tools/goimports/default.nix b/pkgs/development/tools/goimports/default.nix
index 5c69f34e28b3..14c319320d0c 100644
--- a/pkgs/development/tools/goimports/default.nix
+++ b/pkgs/development/tools/goimports/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "goimports-${version}";
diff --git a/pkgs/development/tools/golint/default.nix b/pkgs/development/tools/golint/default.nix
index 99f049314ae8..a617e582c980 100644
--- a/pkgs/development/tools/golint/default.nix
+++ b/pkgs/development/tools/golint/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "lint-${version}";
diff --git a/pkgs/development/tools/gomodifytags/default.nix b/pkgs/development/tools/gomodifytags/default.nix
index f1452bc12114..86b7246b4113 100644
--- a/pkgs/development/tools/gomodifytags/default.nix
+++ b/pkgs/development/tools/gomodifytags/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchgit }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "gomodifytags-${version}";
diff --git a/pkgs/development/tools/gopkgs/default.nix b/pkgs/development/tools/gopkgs/default.nix
index 298657fe38c5..ea9c92c0d0a1 100644
--- a/pkgs/development/tools/gopkgs/default.nix
+++ b/pkgs/development/tools/gopkgs/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "gopkgs-${version}";
diff --git a/pkgs/development/tools/gotags/default.nix b/pkgs/development/tools/gotags/default.nix
index ad22d4ea4079..b8230561fb42 100644
--- a/pkgs/development/tools/gotags/default.nix
+++ b/pkgs/development/tools/gotags/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "gotags-${version}";
diff --git a/pkgs/development/tools/gotests/default.nix b/pkgs/development/tools/gotests/default.nix
index ccdab780e6cf..6c8270f85986 100644
--- a/pkgs/development/tools/gotests/default.nix
+++ b/pkgs/development/tools/gotests/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "gotests-${version}";
diff --git a/pkgs/development/tools/gotools/default.nix b/pkgs/development/tools/gotools/default.nix
index e9a7e7ac8918..4bbb6b0bd4ff 100644
--- a/pkgs/development/tools/gotools/default.nix
+++ b/pkgs/development/tools/gotools/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, go, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, go, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "gotools-${version}";
diff --git a/pkgs/development/tools/govers/default.nix b/pkgs/development/tools/govers/default.nix
index a80f1569329c..440b5e2eb0b7 100644
--- a/pkgs/development/tools/govers/default.nix
+++ b/pkgs/development/tools/govers/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "govers-${version}";
diff --git a/pkgs/development/tools/gox/default.nix b/pkgs/development/tools/gox/default.nix
index 65bc55c6d8d7..69b20dd3a179 100644
--- a/pkgs/development/tools/gox/default.nix
+++ b/pkgs/development/tools/gox/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "gox-${version}";
diff --git a/pkgs/development/tools/haskell/hyper-haskell/default.nix b/pkgs/development/tools/haskell/hyper-haskell/default.nix
index 31697750a702..a2a049615b78 100644
--- a/pkgs/development/tools/haskell/hyper-haskell/default.nix
+++ b/pkgs/development/tools/haskell/hyper-haskell/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, writeText, jshon, electron, hyper-haskell-server, extra-packages ? [] }:
+{ stdenv, fetchFromGitHub, jshon, electron, hyper-haskell-server, extra-packages ? [] }:
 
 let
   binPath = stdenv.lib.makeBinPath ([ hyper-haskell-server ] ++ extra-packages);
diff --git a/pkgs/development/tools/haskell/lambdabot/default.nix b/pkgs/development/tools/haskell/lambdabot/default.nix
index edf967f7d110..5e372b4f3874 100644
--- a/pkgs/development/tools/haskell/lambdabot/default.nix
+++ b/pkgs/development/tools/haskell/lambdabot/default.nix
@@ -1,4 +1,4 @@
-{ lib, haskellLib, fetchpatch, makeWrapper, haskellPackages
+{ lib, haskellLib, makeWrapper, haskellPackages
 , mueval
 , withDjinn ? true
 , aspell ? null
diff --git a/pkgs/development/tools/haskell/multi-ghc-travis/default.nix b/pkgs/development/tools/haskell/multi-ghc-travis/default.nix
index 88c4fc14a666..30dd7f217915 100644
--- a/pkgs/development/tools/haskell/multi-ghc-travis/default.nix
+++ b/pkgs/development/tools/haskell/multi-ghc-travis/default.nix
@@ -1,6 +1,6 @@
 { mkDerivation, ansi-terminal, base, bytestring, Cabal, containers
 , deepseq, Diff, directory, filepath, ShellCheck, stdenv, tasty
-, tasty-golden, transformers, fetchFromGitHub, fetchpatch
+, tasty-golden, transformers, fetchFromGitHub
 }:
 
 mkDerivation {
diff --git a/pkgs/development/tools/hexio/default.nix b/pkgs/development/tools/hexio/default.nix
index 6511bdd20102..905580482d45 100644
--- a/pkgs/development/tools/hexio/default.nix
+++ b/pkgs/development/tools/hexio/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchurl, python, pcsclite, pth }:
+{ stdenv, fetchFromGitHub, python, pcsclite, pth }:
 
 stdenv.mkDerivation rec {
   pname = "hexio";
diff --git a/pkgs/development/tools/iaca/2.1.nix b/pkgs/development/tools/iaca/2.1.nix
index e71e296212cd..b2c764c5a856 100644
--- a/pkgs/development/tools/iaca/2.1.nix
+++ b/pkgs/development/tools/iaca/2.1.nix
@@ -1,4 +1,4 @@
-{ stdenv, makeWrapper, requireFile, patchelf, gcc, unzip }:
+{ stdenv, makeWrapper, requireFile, gcc, unzip }:
 with stdenv.lib;
 
 # v2.1: last version with NHM/WSM arch support
diff --git a/pkgs/development/tools/iaca/3.0.nix b/pkgs/development/tools/iaca/3.0.nix
index af738bc71a93..34b9e1df1906 100644
--- a/pkgs/development/tools/iaca/3.0.nix
+++ b/pkgs/development/tools/iaca/3.0.nix
@@ -1,4 +1,4 @@
-{ stdenv, requireFile, patchelf, unzip }:
+{ stdenv, requireFile, unzip }:
 with stdenv.lib;
 
 stdenv.mkDerivation {
diff --git a/pkgs/development/tools/irony-server/default.nix b/pkgs/development/tools/irony-server/default.nix
index e2aa27a96eb5..b6a78071bc87 100644
--- a/pkgs/development/tools/irony-server/default.nix
+++ b/pkgs/development/tools/irony-server/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchgit, cmake, llvmPackages, irony }:
+{ stdenv, cmake, llvmPackages, irony }:
 
 stdenv.mkDerivation rec {
   name = "irony-server-${version}";
diff --git a/pkgs/development/tools/jmespath/default.nix b/pkgs/development/tools/jmespath/default.nix
index dd0379e83a7c..c53d6608efd3 100644
--- a/pkgs/development/tools/jmespath/default.nix
+++ b/pkgs/development/tools/jmespath/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "jmespath-${version}";
diff --git a/pkgs/development/tools/jp/default.nix b/pkgs/development/tools/jp/default.nix
index d46f7b3e8833..e8e8acd6a9a4 100644
--- a/pkgs/development/tools/jp/default.nix
+++ b/pkgs/development/tools/jp/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub, jmespath }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "jp-${version}";
diff --git a/pkgs/development/tools/json2hcl/default.nix b/pkgs/development/tools/json2hcl/default.nix
index d53b39021339..694428f55a6b 100644
--- a/pkgs/development/tools/json2hcl/default.nix
+++ b/pkgs/development/tools/json2hcl/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "json2hcl";
diff --git a/pkgs/development/tools/kube-aws/default.nix b/pkgs/development/tools/kube-aws/default.nix
index 11f4a5c8bd0a..af5c0e9c2f9f 100644
--- a/pkgs/development/tools/kube-aws/default.nix
+++ b/pkgs/development/tools/kube-aws/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 
 with lib;
 
diff --git a/pkgs/development/tools/leaps/default.nix b/pkgs/development/tools/leaps/default.nix
index 9e41ef381318..afac17b52519 100644
--- a/pkgs/development/tools/leaps/default.nix
+++ b/pkgs/development/tools/leaps/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildGoPackage, fetchFromGitHub, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "leaps-${version}";
diff --git a/pkgs/development/tools/librarian-puppet-go/default.nix b/pkgs/development/tools/librarian-puppet-go/default.nix
index 8adea820ec76..58f50dd2f7e3 100644
--- a/pkgs/development/tools/librarian-puppet-go/default.nix
+++ b/pkgs/development/tools/librarian-puppet-go/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 
 buildGoPackage rec {
   name = "librarian-puppet-go-${version}";
diff --git a/pkgs/development/tools/manul/default.nix b/pkgs/development/tools/manul/default.nix
index c4df52da1701..a5dd0a882728 100644
--- a/pkgs/development/tools/manul/default.nix
+++ b/pkgs/development/tools/manul/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "manul-unstable-2016-09-30";
diff --git a/pkgs/development/tools/misc/autogen/default.nix b/pkgs/development/tools/misc/autogen/default.nix
index 660917ee9f1f..265d425bbcfb 100644
--- a/pkgs/development/tools/misc/autogen/default.nix
+++ b/pkgs/development/tools/misc/autogen/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPackages, fetchurl, which, pkgconfig, texinfo, perl, guile, libxml2 }:
+{ stdenv, buildPackages, fetchurl, which, pkgconfig, perl, guile, libxml2 }:
 
 stdenv.mkDerivation rec {
   name = "autogen-${version}";
diff --git a/pkgs/development/tools/misc/automake/automake-1.16.x.nix b/pkgs/development/tools/misc/automake/automake-1.16.x.nix
index affc400a9ed0..6646b8472526 100644
--- a/pkgs/development/tools/misc/automake/automake-1.16.x.nix
+++ b/pkgs/development/tools/misc/automake/automake-1.16.x.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, perl, autoconf, makeWrapper, doCheck ? false }:
+{ stdenv, fetchurl, perl, autoconf, doCheck ? false }:
 
 stdenv.mkDerivation rec {
   name = "automake-1.16.1";
diff --git a/pkgs/development/tools/misc/binutils/default.nix b/pkgs/development/tools/misc/binutils/default.nix
index 0b71c6719dc4..df4d0e3f47db 100644
--- a/pkgs/development/tools/misc/binutils/default.nix
+++ b/pkgs/development/tools/misc/binutils/default.nix
@@ -1,6 +1,6 @@
 { stdenv, buildPackages
 , fetchurl, zlib, autoreconfHook264
-, buildPlatform, hostPlatform, targetPlatform
+, hostPlatform, targetPlatform
 , noSysDirs, gold ? true, bison ? null
 }:
 
diff --git a/pkgs/development/tools/misc/blackmagic/default.nix b/pkgs/development/tools/misc/blackmagic/default.nix
index ab84cb37656e..2d7225ee03ed 100644
--- a/pkgs/development/tools/misc/blackmagic/default.nix
+++ b/pkgs/development/tools/misc/blackmagic/default.nix
@@ -1,5 +1,5 @@
 { stdenv, lib, fetchFromGitHub
-, gcc-arm-embedded, bash, libftdi
+, gcc-arm-embedded, libftdi
 , python, pythonPackages
 }:
 
diff --git a/pkgs/development/tools/misc/cbrowser/default.nix b/pkgs/development/tools/misc/cbrowser/default.nix
index 51610349c45e..6519f349bfc8 100644
--- a/pkgs/development/tools/misc/cbrowser/default.nix
+++ b/pkgs/development/tools/misc/cbrowser/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, cscope, tk, makeWrapper }:
+{ fetchurl, stdenv, tk, makeWrapper }:
 
 stdenv.mkDerivation rec {
   name = "cbrowser-0.8";
diff --git a/pkgs/development/tools/misc/ccache/default.nix b/pkgs/development/tools/misc/ccache/default.nix
index 34d1d8a829b1..c5cb277c256f 100644
--- a/pkgs/development/tools/misc/ccache/default.nix
+++ b/pkgs/development/tools/misc/ccache/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, runCommand, perl, zlib, makeWrapper }:
+{ stdenv, fetchurl, perl, zlib, makeWrapper }:
 
 let ccache = stdenv.mkDerivation rec {
   name = "ccache-${version}";
diff --git a/pkgs/development/tools/misc/cquery/default.nix b/pkgs/development/tools/misc/cquery/default.nix
index bf9797671269..0b86deb52055 100644
--- a/pkgs/development/tools/misc/cquery/default.nix
+++ b/pkgs/development/tools/misc/cquery/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, makeWrapper
+{ fetchFromGitHub, makeWrapper
 , cmake, llvmPackages, ncurses }:
 
 let
diff --git a/pkgs/development/tools/misc/ctags/wrapped.nix b/pkgs/development/tools/misc/ctags/wrapped.nix
index 4df04f44f56a..75ae9f1ba8b2 100644
--- a/pkgs/development/tools/misc/ctags/wrapped.nix
+++ b/pkgs/development/tools/misc/ctags/wrapped.nix
@@ -1,4 +1,4 @@
-{ pkgs, ctags, writeScriptBin }:
+{ pkgs, ctags }:
 
 with pkgs.stdenv.lib;
 
diff --git a/pkgs/development/tools/misc/dialog/default.nix b/pkgs/development/tools/misc/dialog/default.nix
index 09d1276ed42f..591254c73f57 100644
--- a/pkgs/development/tools/misc/dialog/default.nix
+++ b/pkgs/development/tools/misc/dialog/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, ncurses, gettext
+{ stdenv, fetchurl, ncurses
 , withLibrary ? false, libtool
 , unicodeSupport ? true
 }:
diff --git a/pkgs/development/tools/misc/fswatch/default.nix b/pkgs/development/tools/misc/fswatch/default.nix
index 4d8a9b05847a..a1f33fdfc9e7 100644
--- a/pkgs/development/tools/misc/fswatch/default.nix
+++ b/pkgs/development/tools/misc/fswatch/default.nix
@@ -1,7 +1,7 @@
 { stdenv
 , fetchFromGitHub
 , autoreconfHook
-, findutils                     # for xargs
+                     # for xargs
 , gettext
 , libtool
 , makeWrapper
diff --git a/pkgs/development/tools/misc/global/default.nix b/pkgs/development/tools/misc/global/default.nix
index 296d9673d8f1..f0f21f8f4d5a 100644
--- a/pkgs/development/tools/misc/global/default.nix
+++ b/pkgs/development/tools/misc/global/default.nix
@@ -1,5 +1,5 @@
 { fetchurl, stdenv, libtool, makeWrapper
-, coreutils, ctags, ncurses, pythonPackages, sqlite, universal-ctags, pkgconfig
+, coreutils, ctags, ncurses, pythonPackages, sqlite, universal-ctags
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/tools/misc/hydra/default.nix b/pkgs/development/tools/misc/hydra/default.nix
index 4fdd017306ac..cf516b16f4b4 100644
--- a/pkgs/development/tools/misc/hydra/default.nix
+++ b/pkgs/development/tools/misc/hydra/default.nix
@@ -1,9 +1,9 @@
 { stdenv, nix, perlPackages, buildEnv, releaseTools, fetchFromGitHub
 , makeWrapper, autoconf, automake, libtool, unzip, pkgconfig, sqlite, libpqxx
 , gitAndTools, mercurial, darcs, subversion, bazaar, openssl, bzip2, libxslt
-, guile, perl, postgresql, aws-sdk-cpp, nukeReferences, git, boehmgc
+, guile, perl, postgresql, nukeReferences, git, boehmgc
 , docbook_xsl, openssh, gnused, coreutils, findutils, gzip, lzma, gnutar
-, rpm, dpkg, cdrkit, fetchpatch, pixz }:
+, rpm, dpkg, cdrkit, pixz }:
 
 with stdenv;
 
diff --git a/pkgs/development/tools/misc/intel-gpu-tools/default.nix b/pkgs/development/tools/misc/intel-gpu-tools/default.nix
index 08729f6b41b2..d92b20a12b02 100644
--- a/pkgs/development/tools/misc/intel-gpu-tools/default.nix
+++ b/pkgs/development/tools/misc/intel-gpu-tools/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, pkgconfig, libdrm, libpciaccess, cairo, dri2proto, udev
 , libX11, libXext, libXv, libXrandr, glib, bison, libunwind, python3, kmod
-, procps, autoreconfHook, utilmacros, gnome2 }:
+, procps, utilmacros, gnome2 }:
 
 stdenv.mkDerivation rec {
   name = "intel-gpu-tools-1.22";
diff --git a/pkgs/development/tools/misc/linuxkit/default.nix b/pkgs/development/tools/misc/linuxkit/default.nix
index 71bc3b87a7ac..27f49ebcf38c 100644
--- a/pkgs/development/tools/misc/linuxkit/default.nix
+++ b/pkgs/development/tools/misc/linuxkit/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildGoPackage, go, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "linuxkit-${version}";
diff --git a/pkgs/development/tools/misc/loccount/default.nix b/pkgs/development/tools/misc/loccount/default.nix
index 9205f6caf0dc..017c6ad80491 100644
--- a/pkgs/development/tools/misc/loccount/default.nix
+++ b/pkgs/development/tools/misc/loccount/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitLab }:
+{ stdenv, buildGoPackage, fetchFromGitLab }:
 buildGoPackage rec {
   name = "loccount-${version}";
   version = "1.2";
diff --git a/pkgs/development/tools/misc/md2man/default.nix b/pkgs/development/tools/misc/md2man/default.nix
index 208f0ebd411b..23b7119e7d74 100644
--- a/pkgs/development/tools/misc/md2man/default.nix
+++ b/pkgs/development/tools/misc/md2man/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, go, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 with lib;
 
diff --git a/pkgs/development/tools/misc/moby/default.nix b/pkgs/development/tools/misc/moby/default.nix
index e6f7ac3290b4..c45e7841d450 100644
--- a/pkgs/development/tools/misc/moby/default.nix
+++ b/pkgs/development/tools/misc/moby/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildGoPackage, go, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "moby-${version}";
diff --git a/pkgs/development/tools/misc/pkgconfig/default.nix b/pkgs/development/tools/misc/pkgconfig/default.nix
index 219281f4ec17..7235af49c2e6 100644
--- a/pkgs/development/tools/misc/pkgconfig/default.nix
+++ b/pkgs/development/tools/misc/pkgconfig/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, automake, libiconv, vanilla ? false }:
+{stdenv, fetchurl, libiconv, vanilla ? false }:
 
 with stdenv.lib;
 
diff --git a/pkgs/development/tools/misc/stm32flash/default.nix b/pkgs/development/tools/misc/stm32flash/default.nix
index 3da98f38ebc7..553ded815ef8 100644
--- a/pkgs/development/tools/misc/stm32flash/default.nix
+++ b/pkgs/development/tools/misc/stm32flash/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, unzip }:
+{ stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
   name = "stm32flash-0.5";
diff --git a/pkgs/development/tools/misc/swig/3.x.nix b/pkgs/development/tools/misc/swig/3.x.nix
index 9b4fd05dc0a0..48a2e7bd2cb1 100644
--- a/pkgs/development/tools/misc/swig/3.x.nix
+++ b/pkgs/development/tools/misc/swig/3.x.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, autoconf, automake, libtool, bison, pcre }:
+{ stdenv, fetchFromGitHub, autoconf, automake, libtool, bison, pcre }:
 
 stdenv.mkDerivation rec {
   name = "swig-${version}";
diff --git a/pkgs/development/tools/misc/teensy-loader-cli/default.nix b/pkgs/development/tools/misc/teensy-loader-cli/default.nix
index 4263b80789a2..d6c5256ca84d 100644
--- a/pkgs/development/tools/misc/teensy-loader-cli/default.nix
+++ b/pkgs/development/tools/misc/teensy-loader-cli/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, unzip, libusb, fetchgit }:
+{ stdenv, unzip, libusb, fetchgit }:
 let
   version = "2.1";
 in
diff --git a/pkgs/development/tools/misc/trv/default.nix b/pkgs/development/tools/misc/trv/default.nix
index c8747e66e39b..11caf8e7b20e 100644
--- a/pkgs/development/tools/misc/trv/default.nix
+++ b/pkgs/development/tools/misc/trv/default.nix
@@ -1,6 +1,6 @@
 {stdenv, fetchFromGitHub, ocaml, findlib, camlp4, core_p4, async_p4, async_unix_p4
 , re2_p4, async_extra_p4, sexplib_p4, async_shell, core_extended_p4, async_find
-, cohttp, conduit, magic-mime, tzdata
+, cohttp, conduit, magic-mime
 }:
 
 assert stdenv.lib.versionOlder "4.02" ocaml.version;
diff --git a/pkgs/development/tools/nailgun/default.nix b/pkgs/development/tools/nailgun/default.nix
index dea1ab2a4459..6a34c1c130d9 100644
--- a/pkgs/development/tools/nailgun/default.nix
+++ b/pkgs/development/tools/nailgun/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchMavenArtifact, fetchFromGitHub, bash, jre, makeWrapper }:
+{ stdenv, fetchMavenArtifact, fetchFromGitHub, jre, makeWrapper }:
 
 let
   version = "0.9.1";
diff --git a/pkgs/development/tools/node-webkit/nw12.nix b/pkgs/development/tools/node-webkit/nw12.nix
index f09dbfdb1653..df7630e2d16f 100644
--- a/pkgs/development/tools/node-webkit/nw12.nix
+++ b/pkgs/development/tools/node-webkit/nw12.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, buildEnv, makeWrapper
 , xorg, alsaLib, dbus, glib, gtk2, atk, pango, freetype, fontconfig
-, gdk_pixbuf, cairo, zlib, nss, nssTools, nspr, gconf, expat, systemd, libcap
+, gdk_pixbuf, cairo, nss, nspr, gconf, expat, systemd, libcap
 , libnotify}:
 let
   bits = if stdenv.system == "x86_64-linux" then "x64"
diff --git a/pkgs/development/tools/nwjs/default.nix b/pkgs/development/tools/nwjs/default.nix
index fc1513ecf34b..6840bcac0dc5 100644
--- a/pkgs/development/tools/nwjs/default.nix
+++ b/pkgs/development/tools/nwjs/default.nix
@@ -1,9 +1,9 @@
 { stdenv, fetchurl, buildEnv, makeWrapper
 
-, xorg, alsaLib, dbus, glib, gtk2, gtk3, atk, pango, freetype, fontconfig
-, gdk_pixbuf, cairo, zlib, nss, nssTools, nspr, gconf, expat, systemd, libcap
+, xorg, alsaLib, dbus, glib, gtk3, atk, pango, freetype, fontconfig
+, gdk_pixbuf, cairo, nss, nspr, gconf, expat, systemd, libcap
 , libnotify
-, ffmpeg, libxcb, libXScrnSaver, cups
+, ffmpeg, libxcb, cups
 , sqlite, udev
 }:
 let
diff --git a/pkgs/development/tools/ocaml/camlidl/default.nix b/pkgs/development/tools/ocaml/camlidl/default.nix
index 7cdf7dc93964..7c7bf79acc7d 100644
--- a/pkgs/development/tools/ocaml/camlidl/default.nix
+++ b/pkgs/development/tools/ocaml/camlidl/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, makeWrapper, ocaml, ncurses, writeText }:
+{ stdenv, fetchurl, ocaml, writeText }:
 
 let
   pname = "camlidl";
diff --git a/pkgs/development/tools/ocaml/opam/default.nix b/pkgs/development/tools/ocaml/opam/default.nix
index aa9feda985a3..73b7da119abe 100644
--- a/pkgs/development/tools/ocaml/opam/default.nix
+++ b/pkgs/development/tools/ocaml/opam/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchgit, fetchurl, makeWrapper,
+{ stdenv, lib, fetchurl, makeWrapper,
   ocaml, unzip, ncurses, curl, aspcud
 }:
 
diff --git a/pkgs/development/tools/ocaml/utop/default.nix b/pkgs/development/tools/ocaml/utop/default.nix
index 340c57f28176..74f450a9e3ac 100644
--- a/pkgs/development/tools/ocaml/utop/default.nix
+++ b/pkgs/development/tools/ocaml/utop/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, bash, ocaml, findlib, ocamlbuild, jbuilder
+{ stdenv, fetchurl, ocaml, findlib, ocamlbuild, jbuilder
 , lambdaTerm, cppo, makeWrapper
 }:
 
diff --git a/pkgs/development/tools/parsing/bison/3.x.nix b/pkgs/development/tools/parsing/bison/3.x.nix
index 287bb8beb524..469e64acff06 100644
--- a/pkgs/development/tools/parsing/bison/3.x.nix
+++ b/pkgs/development/tools/parsing/bison/3.x.nix
@@ -1,4 +1,4 @@
-{ stdenv, hostPlatform, fetchurl, m4, perl, help2man }:
+{ stdenv, fetchurl, m4, perl, help2man }:
 
 stdenv.mkDerivation rec {
   name = "bison-3.0.5";
diff --git a/pkgs/development/tools/parsing/hammer/default.nix b/pkgs/development/tools/parsing/hammer/default.nix
index 27596878f346..86c1f82678ae 100644
--- a/pkgs/development/tools/parsing/hammer/default.nix
+++ b/pkgs/development/tools/parsing/hammer/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchgit, glib, pkgconfig, python, scons, pythonPackages }:
+{ stdenv, fetchgit, glib, pkgconfig, python, scons }:
 
 stdenv.mkDerivation rec {
   name = "hammer-${version}";
diff --git a/pkgs/development/tools/quicktemplate/default.nix b/pkgs/development/tools/quicktemplate/default.nix
index 614ffe5e218d..624866ea9e37 100644
--- a/pkgs/development/tools/quicktemplate/default.nix
+++ b/pkgs/development/tools/quicktemplate/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v1.2.1
-{ stdenv, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "quicktemplate-unstable-${version}";
diff --git a/pkgs/development/tools/redis-dump/default.nix b/pkgs/development/tools/redis-dump/default.nix
index 88c975b57352..55797948a84a 100644
--- a/pkgs/development/tools/redis-dump/default.nix
+++ b/pkgs/development/tools/redis-dump/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, bundlerEnv, ruby, perl, autoconf }:
+{ lib, bundlerEnv, ruby, perl, autoconf }:
 
 bundlerEnv {
   name = "redis-dump-0.3.5";
diff --git a/pkgs/development/tools/rtags/default.nix b/pkgs/development/tools/rtags/default.nix
index a2c75a02aa28..da3b27ebacc5 100644
--- a/pkgs/development/tools/rtags/default.nix
+++ b/pkgs/development/tools/rtags/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchgit, cmake, llvmPackages, openssl, writeScript, apple_sdk, bash, emacs, pkgconfig }:
+{ stdenv, lib, fetchgit, cmake, llvmPackages, openssl, apple_sdk, emacs, pkgconfig }:
 
 stdenv.mkDerivation rec {
   name = "rtags-${version}";
diff --git a/pkgs/development/tools/rubocop/default.nix b/pkgs/development/tools/rubocop/default.nix
index 850fb5ad7f58..2b9792e4df25 100644
--- a/pkgs/development/tools/rubocop/default.nix
+++ b/pkgs/development/tools/rubocop/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, bundlerEnv, ruby, makeWrapper }:
+{ lib, bundlerEnv, ruby }:
 
 bundlerEnv rec {
   pname = "rubocop";
diff --git a/pkgs/development/tools/rust/rainicorn/default.nix b/pkgs/development/tools/rust/rainicorn/default.nix
index 370318d1ff29..50c890e3c47e 100644
--- a/pkgs/development/tools/rust/rainicorn/default.nix
+++ b/pkgs/development/tools/rust/rainicorn/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, rustPlatform, makeWrapper }:
+{ stdenv, fetchFromGitHub, rustPlatform }:
 
 with rustPlatform;
 
diff --git a/pkgs/development/tools/selenium/server/default.nix b/pkgs/development/tools/selenium/server/default.nix
index c3d71e2b2a3a..48bfbdd689b8 100644
--- a/pkgs/development/tools/selenium/server/default.nix
+++ b/pkgs/development/tools/selenium/server/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, makeWrapper, jre, jdk, gcc, xorg
+{ stdenv, fetchurl, makeWrapper, jre
 , htmlunit-driver, chromedriver, chromeSupport ? true }:
 
 with stdenv.lib;
diff --git a/pkgs/development/tools/slimerjs/default.nix b/pkgs/development/tools/slimerjs/default.nix
index 041aee7a1c5c..534c69200e02 100644
--- a/pkgs/development/tools/slimerjs/default.nix
+++ b/pkgs/development/tools/slimerjs/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, fetchgit, fetchFromGitHub, zip, unzip, firefox, bash}:
+{stdenv, fetchFromGitHub, zip, unzip, firefox, bash}:
 let
   s = # Generated upstream information
   rec {
diff --git a/pkgs/development/tools/textql/default.nix b/pkgs/development/tools/textql/default.nix
index f6687f4e4328..a3499258a999 100644
--- a/pkgs/development/tools/textql/default.nix
+++ b/pkgs/development/tools/textql/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub, sqlite }:
+{ stdenv, buildGoPackage, fetchFromGitHub, sqlite }:
 
 buildGoPackage rec {
   name = "textql-${version}";
diff --git a/pkgs/development/tools/vim-vint/default.nix b/pkgs/development/tools/vim-vint/default.nix
index 0db25f88d768..ab90bb27bd5e 100644
--- a/pkgs/development/tools/vim-vint/default.nix
+++ b/pkgs/development/tools/vim-vint/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, lib, python3Packages, stdenv }:
+{ fetchFromGitHub, lib, python3Packages }:
 
 with python3Packages;
 
diff --git a/pkgs/development/tools/vndr/default.nix b/pkgs/development/tools/vndr/default.nix
index 2a4ddaf80398..0fbcd7b71a60 100644
--- a/pkgs/development/tools/vndr/default.nix
+++ b/pkgs/development/tools/vndr/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "vndr-${version}";
diff --git a/pkgs/development/tools/ws/default.nix b/pkgs/development/tools/ws/default.nix
index b99780d41382..17c64f0548b3 100644
--- a/pkgs/development/tools/ws/default.nix
+++ b/pkgs/development/tools/ws/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v1.2.1
-{ stdenv, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "ws-${version}";
diff --git a/pkgs/development/tools/xcbuild/wrapper.nix b/pkgs/development/tools/xcbuild/wrapper.nix
index f8b1c1bf31e9..6a3267b7c341 100644
--- a/pkgs/development/tools/xcbuild/wrapper.nix
+++ b/pkgs/development/tools/xcbuild/wrapper.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPackages, makeWrapper, writeText, runCommand
+{ lib, buildPackages, makeWrapper, writeText, runCommand
 , CoreServices, ImageIO, CoreGraphics
 , targetPlatform
 , xcodePlatform ? targetPlatform.xcodePlatform or "MacOSX"
diff --git a/pkgs/development/tools/xib2nib/default.nix b/pkgs/development/tools/xib2nib/default.nix
index d585a35b0bc5..4d62f5b85714 100644
--- a/pkgs/development/tools/xib2nib/default.nix
+++ b/pkgs/development/tools/xib2nib/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchFromGitHub, pugixml, boost, PlistCpp }:
+{ stdenv, fetchFromGitHub, pugixml, boost, PlistCpp }:
 
 stdenv.mkDerivation {
   name = "xib2nib-730e177";
diff --git a/pkgs/development/tools/yq/default.nix b/pkgs/development/tools/yq/default.nix
index 52231d0a8318..a08e01a48b7f 100644
--- a/pkgs/development/tools/yq/default.nix
+++ b/pkgs/development/tools/yq/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonApplication, fetchPypi, pyyaml, xmltodict, jq }:
+{ lib, buildPythonApplication, fetchPypi, pyyaml, xmltodict, jq }:
 
 buildPythonApplication rec {
   pname = "yq";
diff --git a/pkgs/development/web/minify/default.nix b/pkgs/development/web/minify/default.nix
index 0220fbd8df82..e63f609fc2b6 100644
--- a/pkgs/development/web/minify/default.nix
+++ b/pkgs/development/web/minify/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildGoPackage, fetchFromGitHub }:
+{ buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "minify-${version}";
diff --git a/pkgs/development/web/postman/default.nix b/pkgs/development/web/postman/default.nix
index c51e1595ee72..4b45251cde5f 100644
--- a/pkgs/development/web/postman/default.nix
+++ b/pkgs/development/web/postman/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, gnome2, fetchurl, pkgs, xorg, udev, makeWrapper, makeDesktopItem }:
+{ stdenv, lib, gnome2, fetchurl, pkgs, xorg, makeWrapper, makeDesktopItem }:
 
 stdenv.mkDerivation rec {
   name = "postman-${version}";
diff --git a/pkgs/games/0ad/game.nix b/pkgs/games/0ad/game.nix
index 0cf1b6f5e671..d05f19d3171c 100644
--- a/pkgs/games/0ad/game.nix
+++ b/pkgs/games/0ad/game.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, callPackage, perl, fetchurl, python2
+{ stdenv, lib, perl, fetchurl, python2
 , pkgconfig, spidermonkey_38, boost, icu, libxml2, libpng, libsodium
 , libjpeg, zlib, curl, libogg, libvorbis, enet, miniupnpc
 , openal, libGLU_combined, xproto, libX11, libXcursor, nspr, SDL2
diff --git a/pkgs/games/90secondportraits/default.nix b/pkgs/games/90secondportraits/default.nix
index 0ada8d64685d..f2be128fd998 100644
--- a/pkgs/games/90secondportraits/default.nix
+++ b/pkgs/games/90secondportraits/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, unzip, love, lua, makeWrapper, makeDesktopItem }:
+{ stdenv, fetchurl, love, lua, makeWrapper, makeDesktopItem }:
 
 let
   pname = "90secondportraits";
diff --git a/pkgs/games/commandergenius/default.nix b/pkgs/games/commandergenius/default.nix
index 70413f0f941b..2abc46690e94 100644
--- a/pkgs/games/commandergenius/default.nix
+++ b/pkgs/games/commandergenius/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, SDL2, SDL2_image, pkgconfig
+{ stdenv, fetchFromGitHub, SDL2, SDL2_image, pkgconfig
 , libvorbis, libGL, boost, cmake, zlib, curl, SDL2_mixer, python3
 }:
 
diff --git a/pkgs/games/dwarf-fortress/default.nix b/pkgs/games/dwarf-fortress/default.nix
index d9a5df73f17c..cb75b6802702 100644
--- a/pkgs/games/dwarf-fortress/default.nix
+++ b/pkgs/games/dwarf-fortress/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv, stdenvNoCC, buildEnv, gccStdenv, lib, recurseIntoAttrs }:
+{ pkgs, stdenv, stdenvNoCC, gccStdenv, lib, recurseIntoAttrs }:
 
 # To whomever it may concern:
 #
@@ -60,9 +60,7 @@ let
     legends-browser = callPackage ./legends-browser {};
 
     twbt = callPackage ./twbt {};
-    themes = recurseIntoAttrs (callPackage ./themes {
-      stdenv = stdenvNoCC;
-    });
+    themes = recurseIntoAttrs (callPackage ./themes { });
 
     # aliases
     phoebus-theme = themes.phoebus;
diff --git a/pkgs/games/dwarf-fortress/dfhack/default.nix b/pkgs/games/dwarf-fortress/dfhack/default.nix
index baad45298441..f781b0a71de3 100644
--- a/pkgs/games/dwarf-fortress/dfhack/default.nix
+++ b/pkgs/games/dwarf-fortress/dfhack/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildEnv, hostPlatform, lib, fetchurl, fetchFromGitHub, cmake, writeScriptBin, callPackage
+{ stdenv, buildEnv, lib, fetchFromGitHub, cmake, writeScriptBin
 , perl, XMLLibXML, XMLLibXSLT, zlib
 , enableStoneSense ? false,  allegro5, libGLU_combined
 , enableTWBT ? true, twbt
diff --git a/pkgs/games/dwarf-fortress/dwarf-therapist/default.nix b/pkgs/games/dwarf-fortress/dwarf-therapist/default.nix
index 5e92bbb285b8..4236d6bab989 100644
--- a/pkgs/games/dwarf-fortress/dwarf-therapist/default.nix
+++ b/pkgs/games/dwarf-fortress/dwarf-therapist/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, coreutils, qtbase
+{ stdenv, fetchFromGitHub, qtbase
 , qtdeclarative, cmake, texlive, ninja }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/games/dwarf-fortress/dwarf-therapist/wrapper.nix b/pkgs/games/dwarf-fortress/dwarf-therapist/wrapper.nix
index 54f0f0405ac5..322a21ec3ad9 100644
--- a/pkgs/games/dwarf-fortress/dwarf-therapist/wrapper.nix
+++ b/pkgs/games/dwarf-fortress/dwarf-therapist/wrapper.nix
@@ -1,4 +1,4 @@
-{ stdenv, symlinkJoin, lib, dwarf-therapist, dwarf-fortress, makeWrapper }:
+{ stdenv, symlinkJoin, dwarf-therapist, dwarf-fortress, makeWrapper }:
 
 let
   platformSlug = if stdenv.targetPlatform.is32bit then
diff --git a/pkgs/games/dwarf-fortress/lazy-pack.nix b/pkgs/games/dwarf-fortress/lazy-pack.nix
index 3aa9e573f61d..3e0d3dcc6d73 100644
--- a/pkgs/games/dwarf-fortress/lazy-pack.nix
+++ b/pkgs/games/dwarf-fortress/lazy-pack.nix
@@ -1,4 +1,4 @@
-{ stdenvNoCC, lib, buildEnv, callPackage
+{ stdenvNoCC, lib, buildEnv
 , dwarf-fortress, themes
   # This package should, at any given time, provide an opinionated "optimal"
   # DF experience. It's the equivalent of the Lazy Newbie Pack, that is, and
diff --git a/pkgs/games/dwarf-fortress/themes/default.nix b/pkgs/games/dwarf-fortress/themes/default.nix
index 5caaa9e05ca5..0b8eb23a7b9d 100644
--- a/pkgs/games/dwarf-fortress/themes/default.nix
+++ b/pkgs/games/dwarf-fortress/themes/default.nix
@@ -1,4 +1,4 @@
-{stdenv, lib, fetchFromGitHub}:
+{lib, fetchFromGitHub}:
 
 with builtins;
 
diff --git a/pkgs/games/gcs/default.nix b/pkgs/games/gcs/default.nix
index defee04e5c24..b718a92143cb 100644
--- a/pkgs/games/gcs/default.nix
+++ b/pkgs/games/gcs/default.nix
@@ -1,7 +1,6 @@
 { stdenv, fetchFromGitHub, runCommand
 , jdk8, ant
 , jre8, makeWrapper
-, findutils
 }:
 
 let
diff --git a/pkgs/games/gzdoom/default.nix b/pkgs/games/gzdoom/default.nix
index df1dd47905e4..ae1db1d8b4a3 100644
--- a/pkgs/games/gzdoom/default.nix
+++ b/pkgs/games/gzdoom/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, cmake, zdoom, makeWrapper
+{ stdenv, fetchFromGitHub, cmake, makeWrapper
 , openal, fluidsynth, soundfont-fluid, libGL, SDL2
 , bzip2, zlib, libjpeg, libsndfile, mpg123, game-music-emu }:
 
diff --git a/pkgs/games/meritous/default.nix b/pkgs/games/meritous/default.nix
index 8d49d38b4158..21d2ad87dfb8 100644
--- a/pkgs/games/meritous/default.nix
+++ b/pkgs/games/meritous/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitLab, SDL, SDL_image, SDL_mixer, zlib, binutils }:
+{ stdenv, fetchFromGitLab, SDL, SDL_image, SDL_mixer, zlib }:
 
 stdenv.mkDerivation rec {
   name = "meritous-${version}";
diff --git a/pkgs/games/mnemosyne/default.nix b/pkgs/games/mnemosyne/default.nix
index a5b349334923..7c32d7faa3c5 100644
--- a/pkgs/games/mnemosyne/default.nix
+++ b/pkgs/games/mnemosyne/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, fetchurl
+{ fetchurl
 , python
 }:
 
diff --git a/pkgs/games/mrrescue/default.nix b/pkgs/games/mrrescue/default.nix
index a693c79e8cec..aa4a06bc7d2b 100644
--- a/pkgs/games/mrrescue/default.nix
+++ b/pkgs/games/mrrescue/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, unzip, love, lua, makeWrapper, makeDesktopItem }:
+{ stdenv, fetchurl, love, lua, makeWrapper, makeDesktopItem }:
 
 let
   pname = "mrrescue";
diff --git a/pkgs/games/nethack/default.nix b/pkgs/games/nethack/default.nix
index db959177eb57..d4ad1119b9f5 100644
--- a/pkgs/games/nethack/default.nix
+++ b/pkgs/games/nethack/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, writeScript, coreutils, ncurses, gzip, flex, bison
+{ stdenv, lib, fetchurl, coreutils, ncurses, gzip, flex, bison
 , less, makeWrapper
 , x11Mode ? false, qtMode ? false, libXaw, libXext, mkfontdir, pkgconfig, qt5
 }:
diff --git a/pkgs/games/opendune/default.nix b/pkgs/games/opendune/default.nix
index 7b848086794b..0f045faf371e 100644
--- a/pkgs/games/opendune/default.nix
+++ b/pkgs/games/opendune/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, SDL, SDL_image, SDL_mixer, binutils }:
+{ stdenv, fetchFromGitHub, SDL, SDL_image, SDL_mixer }:
 
 # - set the opendune configuration at ~/.config/opendune/opendune.ini:
 #     [opendune]
diff --git a/pkgs/games/openmw/default.nix b/pkgs/games/openmw/default.nix
index 8080c9596388..4d01feaccc0d 100644
--- a/pkgs/games/openmw/default.nix
+++ b/pkgs/games/openmw/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, qt4, openscenegraph, mygui, bullet, ffmpeg, boost, cmake, SDL2, unshield, openal
-, giflib, libXt, pkgconfig }:
+, libXt, pkgconfig }:
 
 let
   openscenegraph_ = openscenegraph.overrideDerivation (self: {
diff --git a/pkgs/games/openrct2/default.nix b/pkgs/games/openrct2/default.nix
index 9e67c7847f83..e5783ec5396f 100644
--- a/pkgs/games/openrct2/default.nix
+++ b/pkgs/games/openrct2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub,
+{ stdenv, fetchFromGitHub,
   SDL2, cmake, curl, fontconfig, freetype, icu, jansson, libiconv, libpng,
   libpthreadstubs, libzip, libGLU, openssl, pkgconfig, speexdsp, zlib
 }:
diff --git a/pkgs/games/openspades/default.nix b/pkgs/games/openspades/default.nix
index 582cafcc4d46..b47572655559 100644
--- a/pkgs/games/openspades/default.nix
+++ b/pkgs/games/openspades/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, fetchFromGitHub, cmake, unzip, zip, file
+{ stdenv, fetchurl, fetchFromGitHub, cmake, unzip, zip, file
 , curl, glew , libGL, SDL2, SDL2_image, zlib, freetype, imagemagick
 , openal , opusfile, libogg
 }:
diff --git a/pkgs/games/openxcom/default.nix b/pkgs/games/openxcom/default.nix
index a936ca134122..9a82c678f370 100644
--- a/pkgs/games/openxcom/default.nix
+++ b/pkgs/games/openxcom/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchFromGitHub, fetchpatch, cmake, libGLU_combined, zlib, openssl, libyamlcpp, boost
+{stdenv, fetchFromGitHub, cmake, libGLU_combined, zlib, openssl, libyamlcpp, boost
 , SDL, SDL_image, SDL_mixer, SDL_gfx }:
 
 let version = "1.0.0.2018.01.28"; in
diff --git a/pkgs/games/pokerth/default.nix b/pkgs/games/pokerth/default.nix
index 122ce3f6e2fa..aae49eedd7c9 100644
--- a/pkgs/games/pokerth/default.nix
+++ b/pkgs/games/pokerth/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, qmake4Hook, qt4, protobuf, boost155, tinyxml2, libgcrypt, sqlite, gsasl, curl, SDL, SDL_mixer, libircclient }:
+{ stdenv, fetchFromGitHub, qmake4Hook, qt4, protobuf, boost155, tinyxml2, libgcrypt, sqlite, gsasl, curl, SDL, SDL_mixer, libircclient }:
 
 let boost = boost155;
 in stdenv.mkDerivation rec {
diff --git a/pkgs/games/quake3/wrapper/default.nix b/pkgs/games/quake3/wrapper/default.nix
index 69b166664be4..4ab53d677324 100644
--- a/pkgs/games/quake3/wrapper/default.nix
+++ b/pkgs/games/quake3/wrapper/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildEnv, lib, fetchurl, libGL, ioquake3, makeWrapper }:
+{ stdenv, buildEnv, lib, libGL, ioquake3, makeWrapper }:
 
 { paks, name ? (stdenv.lib.head paks).name, description ? "" }:
 
diff --git a/pkgs/games/rigsofrods/default.nix b/pkgs/games/rigsofrods/default.nix
index a038957f701e..e75698e72799 100644
--- a/pkgs/games/rigsofrods/default.nix
+++ b/pkgs/games/rigsofrods/default.nix
@@ -1,5 +1,5 @@
-{ fetchurl, fetchFromGitHub, stdenv, wxGTK30, freeimage, cmake, zziplib, libGLU_combined, boost,
-  pkgconfig, libuuid, openal, ogre, ois, curl, gtk2, pixman, mygui, unzip,
+{ fetchFromGitHub, stdenv, wxGTK30, freeimage, cmake, zziplib, libGLU_combined, boost,
+  pkgconfig, libuuid, openal, ogre, ois, curl, gtk2, mygui, unzip,
   angelscript, ogrepaged, mysocketw, libxcb
   }:
 
diff --git a/pkgs/games/sienna/default.nix b/pkgs/games/sienna/default.nix
index 2636bc9e7990..58ed85c79fdb 100644
--- a/pkgs/games/sienna/default.nix
+++ b/pkgs/games/sienna/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, unzip, love, lua, makeWrapper, makeDesktopItem }:
+{ stdenv, fetchurl, love, lua, makeWrapper, makeDesktopItem }:
 
 let
   pname = "sienna";
diff --git a/pkgs/games/spring/default.nix b/pkgs/games/spring/default.nix
index 83a85415664d..1dcf432ccd48 100644
--- a/pkgs/games/spring/default.nix
+++ b/pkgs/games/spring/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, cmake, lzma, boost, libdevil, zlib, p7zip
-, openal, libvorbis, glew, freetype, xorg, SDL2, libGLU_combined, binutils
+, openal, libvorbis, glew, freetype, xorg, SDL2, libGLU_combined
 , asciidoc, libxslt, docbook_xsl, docbook_xsl_ns, curl, makeWrapper
 , jdk ? null, python ? null, systemd, libunwind, which, minizip
 , withAI ? true # support for AI Interfaces and Skirmish AIs
diff --git a/pkgs/games/spring/springlobby.nix b/pkgs/games/spring/springlobby.nix
index 2000398b537d..632a047e96c7 100644
--- a/pkgs/games/spring/springlobby.nix
+++ b/pkgs/games/spring/springlobby.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, cmake, wxGTK30, openal, pkgconfig, curl, libtorrentRasterbar
-, libpng, libX11, gettext, bash, gawk, boost, libnotify, gtk2, doxygen, spring
+, libpng, libX11, gettext, boost, libnotify, gtk2, doxygen, spring
 , makeWrapper, glib, minizip, alure, pcre, jsoncpp }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/games/stepmania/default.nix b/pkgs/games/stepmania/default.nix
index d51d1bb154d6..4f9406abd835 100644
--- a/pkgs/games/stepmania/default.nix
+++ b/pkgs/games/stepmania/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchpatch, fetchFromGitHub, cmake, nasm
+{ stdenv, lib, fetchFromGitHub, cmake, nasm
 , gtk2, glib, ffmpeg, alsaLib, libmad, libogg, libvorbis
 , glew, libpulseaudio, udev
 }:
diff --git a/pkgs/games/tibia/default.nix b/pkgs/games/tibia/default.nix
index e0f9bae2e39b..cfef1ed0db2b 100644
--- a/pkgs/games/tibia/default.nix
+++ b/pkgs/games/tibia/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, patchelf, glibc, libX11, libGLU_combined }:
+{ stdenv, fetchurl, glibc, libX11, libGLU_combined }:
 
 with stdenv.lib;
 stdenv.mkDerivation {
diff --git a/pkgs/games/torcs/default.nix b/pkgs/games/torcs/default.nix
index 522a1a2857d5..b941f3bd2e05 100644
--- a/pkgs/games/torcs/default.nix
+++ b/pkgs/games/torcs/default.nix
@@ -1,6 +1,6 @@
 { fetchpatch, fetchurl, stdenv, libGLU, freeglut, libX11, plib, openal, freealut, libXrandr, xproto,
 libXext, libSM, libICE, libXi, libXt, libXrender, libXxf86vm, libvorbis,
-libpng, zlib, bash, makeWrapper }:
+libpng, zlib, makeWrapper }:
 
 stdenv.mkDerivation rec {
   name = "torcs-1.3.7";
diff --git a/pkgs/games/uqm/default.nix b/pkgs/games/uqm/default.nix
index dd60c0efb599..00592f7c39bb 100644
--- a/pkgs/games/uqm/default.nix
+++ b/pkgs/games/uqm/default.nix
@@ -1,5 +1,5 @@
 { stdenv, lib, fetchurl, pkgconfig, libGLU_combined
-, SDL, SDL_image, libpng, zlib, libvorbis, libogg, libmikmod
+, SDL, SDL_image, libpng, libvorbis, libogg, libmikmod
 
 , use3DOVideos ? false, requireFile ? null, writeText ? null
 , haskellPackages ? null
diff --git a/pkgs/games/vdrift/default.nix b/pkgs/games/vdrift/default.nix
index ce20d1b3f177..7e43fbf2c880 100644
--- a/pkgs/games/vdrift/default.nix
+++ b/pkgs/games/vdrift/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, fetchsvn, pkgconfig, scons, libGLU_combined, SDL2, SDL2_image
-, libvorbis, bullet, curl, gettext, writeTextFile, writeShellScriptBin
+, libvorbis, bullet, curl, gettext, writeTextFile
 
 , data ? fetchsvn {
     url = "svn://svn.code.sf.net/p/vdrift/code/vdrift-data";
diff --git a/pkgs/games/wesnoth/default.nix b/pkgs/games/wesnoth/default.nix
index 45b4e5a5891e..75afddf52c8e 100644
--- a/pkgs/games/wesnoth/default.nix
+++ b/pkgs/games/wesnoth/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, cmake, pkgconfig, SDL2, SDL2_image, SDL2_mixer, SDL2_net, SDL2_ttf
-, pango, gettext, boost, freetype, libvorbis, fribidi, dbus, libpng, pcre, openssl, icu
+, pango, gettext, boost, libvorbis, fribidi, dbus, libpng, pcre, openssl, icu
 , Cocoa, Foundation
 , enableTools ? false
 }:
diff --git a/pkgs/games/widelands/default.nix b/pkgs/games/widelands/default.nix
index 222275a2ba1a..1e2c17814d6f 100644
--- a/pkgs/games/widelands/default.nix
+++ b/pkgs/games/widelands/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, cmake, python, gettext
 , boost, libpng, zlib, glew, lua, doxygen, icu
-, SDL2, SDL2_image, SDL2_mixer, SDL2_net, SDL2_ttf, SDL2_gfx
+, SDL2, SDL2_image, SDL2_mixer, SDL2_net, SDL2_ttf
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/games/worldofgoo/default.nix b/pkgs/games/worldofgoo/default.nix
index af76e85346f7..9684f3b876a8 100644
--- a/pkgs/games/worldofgoo/default.nix
+++ b/pkgs/games/worldofgoo/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, config, requireFile, fetchurl
+{ stdenv, requireFile
 , libX11, libXext, libXau, libxcb, libXdmcp , SDL, SDL_mixer, libvorbis, libGLU_combined
 , demo ? false }:
 
diff --git a/pkgs/games/xonotic/default.nix b/pkgs/games/xonotic/default.nix
index 6d9ae55e639c..ac7bf7973d77 100644
--- a/pkgs/games/xonotic/default.nix
+++ b/pkgs/games/xonotic/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl
 , # required for both
-  unzip, libjpeg, zlib, libvorbis, curl, patchelf
+  unzip, libjpeg, zlib, libvorbis, curl
 , # glx
   libX11, libGLU_combined, libXpm, libXext, libXxf86vm, alsaLib
 , # sdl
diff --git a/pkgs/games/zandronum/sqlite.nix b/pkgs/games/zandronum/sqlite.nix
index 35fcb4a0eec7..3d60dab6fe00 100644
--- a/pkgs/games/zandronum/sqlite.nix
+++ b/pkgs/games/zandronum/sqlite.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, unzip }:
+{ lib, stdenv, fetchurl }:
 
 stdenv.mkDerivation {
   name = "sqlite-zandronum-3.0";
diff --git a/pkgs/misc/cups/drivers/brlaser/default.nix b/pkgs/misc/cups/drivers/brlaser/default.nix
index 0f5ee05349de..1786a4996a30 100644
--- a/pkgs/misc/cups/drivers/brlaser/default.nix
+++ b/pkgs/misc/cups/drivers/brlaser/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, cmake, zlib, cups, ghostscript }:
+{ stdenv, fetchFromGitHub, cmake, zlib, cups }:
 
 stdenv.mkDerivation rec {
 
diff --git a/pkgs/misc/cups/drivers/hl1110/default.nix b/pkgs/misc/cups/drivers/hl1110/default.nix
index 6f27985bdbfc..701d4b6a1002 100644
--- a/pkgs/misc/cups/drivers/hl1110/default.nix
+++ b/pkgs/misc/cups/drivers/hl1110/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, cups, dpkg, gnused, makeWrapper, ghostscript, file, a2ps, coreutils, gawk, patchelf}:
+{stdenv, fetchurl, cups, dpkg, gnused, makeWrapper, ghostscript, file, a2ps, coreutils, gawk}:
 
 let
   version = "3.0.1-1";
diff --git a/pkgs/misc/cups/drivers/mfcj470dwlpr/default.nix b/pkgs/misc/cups/drivers/mfcj470dwlpr/default.nix
index c5b63b07318d..f69c972c9996 100644
--- a/pkgs/misc/cups/drivers/mfcj470dwlpr/default.nix
+++ b/pkgs/misc/cups/drivers/mfcj470dwlpr/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, cups, dpkg, ghostscript, patchelf, a2ps, coreutils, gnused, gawk, file, makeWrapper }:
+{ stdenv, fetchurl, cups, dpkg, ghostscript, a2ps, coreutils, gnused, gawk, file, makeWrapper }:
 
 stdenv.mkDerivation rec {
   name = "mfcj470dw-cupswrapper-${version}";
diff --git a/pkgs/misc/cups/drivers/mfcj6510dwlpr/default.nix b/pkgs/misc/cups/drivers/mfcj6510dwlpr/default.nix
index 40e65136f1b0..ff71df5dc1ba 100644
--- a/pkgs/misc/cups/drivers/mfcj6510dwlpr/default.nix
+++ b/pkgs/misc/cups/drivers/mfcj6510dwlpr/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgsi686Linux, dpkg, makeWrapper, coreutils, gnused, gawk, file, cups, patchelf, utillinux, xxd
+{ stdenv, fetchurl, pkgsi686Linux, dpkg, makeWrapper, coreutils, gnused, gawk, file, cups, utillinux, xxd
 , ghostscript, a2ps }:
 
 # Why:
diff --git a/pkgs/misc/cups/drivers/samsung/default.nix b/pkgs/misc/cups/drivers/samsung/default.nix
index e8da0541f6c5..48636e1f76aa 100644
--- a/pkgs/misc/cups/drivers/samsung/default.nix
+++ b/pkgs/misc/cups/drivers/samsung/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, glibc, cups, libusb, libxml2, ghostscript }:
+{ stdenv, fetchurl, cups, libusb, libxml2 }:
 
 let
 
diff --git a/pkgs/misc/cups/drivers/splix/default.nix b/pkgs/misc/cups/drivers/splix/default.nix
index 2cdaca8d7832..bde918a7c484 100644
--- a/pkgs/misc/cups/drivers/splix/default.nix
+++ b/pkgs/misc/cups/drivers/splix/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchsvn, fetchurl, cups, zlib }:
+{ stdenv, fetchsvn, cups, zlib }:
 let rev = "315"; in
 stdenv.mkDerivation rec {
   name = "splix-svn-${rev}";
diff --git a/pkgs/misc/cups/filters.nix b/pkgs/misc/cups/filters.nix
index d15680b63639..d85331e78825 100644
--- a/pkgs/misc/cups/filters.nix
+++ b/pkgs/misc/cups/filters.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, pkgconfig, cups, poppler, poppler_utils, fontconfig
-, libjpeg, libpng, perl, ijs, qpdf, dbus, substituteAll, bash, avahi
+, libjpeg, libpng, perl, ijs, qpdf, dbus, avahi
 , makeWrapper, coreutils, gnused, bc, gawk, gnugrep, which, ghostscript
 , mupdf
 }:
diff --git a/pkgs/misc/drivers/epson-alc1100/default.nix b/pkgs/misc/drivers/epson-alc1100/default.nix
index 88b88f59afc8..1dac6034fdab 100644
--- a/pkgs/misc/drivers/epson-alc1100/default.nix
+++ b/pkgs/misc/drivers/epson-alc1100/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, stdenv_32bit, fetchurl, cups, pkgsi686Linux, dpkg, psutils, makeWrapper, ghostscript, bash }:
+{ stdenv, fetchurl, cups, pkgsi686Linux, dpkg, psutils, makeWrapper, ghostscript, bash }:
 
 let
   version = "1.2-0";
diff --git a/pkgs/misc/drivers/hplip/3.16.11.nix b/pkgs/misc/drivers/hplip/3.16.11.nix
index 37f2361b45e8..91dce834a4bd 100644
--- a/pkgs/misc/drivers/hplip/3.16.11.nix
+++ b/pkgs/misc/drivers/hplip/3.16.11.nix
@@ -1,8 +1,7 @@
 { stdenv, fetchurl, substituteAll
 , pkgconfig
-, makeWrapper
-, cups, zlib, libjpeg, libusb1, pythonPackages, sane-backends, dbus, usbutils
-, net_snmp, openssl, polkit, nettools
+, cups, libjpeg, libusb1, pythonPackages, sane-backends, dbus, usbutils
+, net_snmp, openssl, nettools
 , bash, coreutils, utillinux
 , qtSupport ? true
 , withPlugin ? false
diff --git a/pkgs/misc/drivers/hplip/default.nix b/pkgs/misc/drivers/hplip/default.nix
index 4b88d4a96fa0..59a75dab8832 100644
--- a/pkgs/misc/drivers/hplip/default.nix
+++ b/pkgs/misc/drivers/hplip/default.nix
@@ -1,9 +1,8 @@
 { stdenv, fetchurl, substituteAll
 , pkgconfig
-, makeWrapper
 , cups, zlib, libjpeg, libusb1, pythonPackages, sane-backends
 , dbus, file, ghostscript, usbutils
-, net_snmp, openssl, perl, polkit, nettools
+, net_snmp, openssl, perl, nettools
 , bash, coreutils, utillinux
 , withQt5 ? true
 , withPlugin ? false
diff --git a/pkgs/misc/drivers/postscript-lexmark/default.nix b/pkgs/misc/drivers/postscript-lexmark/default.nix
index f41104580626..a7d5710a2793 100644
--- a/pkgs/misc/drivers/postscript-lexmark/default.nix
+++ b/pkgs/misc/drivers/postscript-lexmark/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, rpmextract }:
+{ stdenv, fetchurl, rpmextract }:
 let
   version = "20160218";
 in
diff --git a/pkgs/misc/emulators/cdemu/analyzer.nix b/pkgs/misc/emulators/cdemu/analyzer.nix
index e0fe451ce24d..64b485bea310 100644
--- a/pkgs/misc/emulators/cdemu/analyzer.nix
+++ b/pkgs/misc/emulators/cdemu/analyzer.nix
@@ -1,4 +1,4 @@
-{ callPackage, gtk3, glib, libxml2, gnuplot, makeWrapper, stdenv, gnome3, gdk_pixbuf, librsvg, intltool }:
+{ callPackage, gtk3, glib, libxml2, gnuplot, makeWrapper, gnome3, gdk_pixbuf, librsvg, intltool }:
 let pkg = import ./base.nix {
   version = "3.1.0";
   pkgName = "image-analyzer";
diff --git a/pkgs/misc/emulators/cdemu/gui.nix b/pkgs/misc/emulators/cdemu/gui.nix
index d6c85c53b421..9403a969e8f4 100644
--- a/pkgs/misc/emulators/cdemu/gui.nix
+++ b/pkgs/misc/emulators/cdemu/gui.nix
@@ -1,4 +1,4 @@
-{ callPackage, pythonPackages, gtk3, glib, libnotify, intltool, makeWrapper, gobjectIntrospection, gnome3, gdk_pixbuf, librsvg }:
+{ callPackage, pythonPackages, gtk3, glib, libnotify, intltool, makeWrapper, gnome3, gdk_pixbuf, librsvg }:
 let
   pkg = import ./base.nix {
     version = "3.1.0";
diff --git a/pkgs/misc/emulators/cdemu/vhba.nix b/pkgs/misc/emulators/cdemu/vhba.nix
index 081846f78e35..73ef7bc6a180 100644
--- a/pkgs/misc/emulators/cdemu/vhba.nix
+++ b/pkgs/misc/emulators/cdemu/vhba.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, kernel, libelf }:
+{ stdenv, fetchurl, kernel }:
 
 stdenv.mkDerivation rec {
   name = "vhba-${version}";
diff --git a/pkgs/misc/emulators/dosbox/unstable.nix b/pkgs/misc/emulators/dosbox/unstable.nix
index 86dfd25d175f..aecfd7698f07 100644
--- a/pkgs/misc/emulators/dosbox/unstable.nix
+++ b/pkgs/misc/emulators/dosbox/unstable.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchsvn, SDL, SDL_net, SDL_sound, libpng, makeDesktopItem, libGLU_combined, autoreconfHook }:
+{ stdenv, fetchsvn, SDL, SDL_net, SDL_sound, libpng, makeDesktopItem, libGLU_combined, autoreconfHook }:
 
 let revision = "4025";
     revisionDate = "2017-07-02";
diff --git a/pkgs/misc/emulators/epsxe/default.nix b/pkgs/misc/emulators/epsxe/default.nix
index a0999e6caf52..5de8ac46b905 100644
--- a/pkgs/misc/emulators/epsxe/default.nix
+++ b/pkgs/misc/emulators/epsxe/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, alsaLib, curl, gdk_pixbuf, gcc, glib, gtk3,
+{ stdenv, fetchurl, alsaLib, curl, gdk_pixbuf, glib, gtk3,
   libX11, openssl, ncurses5, SDL, SDL_ttf, unzip, zlib, wrapGAppsHook }:
 
 with stdenv.lib;
diff --git a/pkgs/misc/emulators/mupen64plus/default.nix b/pkgs/misc/emulators/mupen64plus/default.nix
index 7de9b576ef37..9ff99110eccf 100644
--- a/pkgs/misc/emulators/mupen64plus/default.nix
+++ b/pkgs/misc/emulators/mupen64plus/default.nix
@@ -1,4 +1,4 @@
-{stdenv, lib, fetchurl, boost, dash, freetype, libpng, pkgconfig, SDL, which, zlib }:
+{stdenv, fetchurl, boost, dash, freetype, libpng, pkgconfig, SDL, which, zlib }:
 
 stdenv.mkDerivation rec {
   name = "mupen64plus-${version}";
diff --git a/pkgs/misc/emulators/nestopia/default.nix b/pkgs/misc/emulators/nestopia/default.nix
index 8a366ba737f3..9eb353ede583 100644
--- a/pkgs/misc/emulators/nestopia/default.nix
+++ b/pkgs/misc/emulators/nestopia/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, fetchFromGitHub, fetchpatch, pkgconfig, SDL2, alsaLib, gtk3
-, makeWrapper, libGLU_combined, libarchive, libao, unzip, xdg_utils, gsettings-desktop-schemas
+{ stdenv, fetchFromGitHub, pkgconfig, SDL2, alsaLib, gtk3
+, makeWrapper, libGLU_combined, libarchive, libao, unzip, xdg_utils
 , epoxy, gdk_pixbuf, gnome3, wrapGAppsHook
 }:
 
diff --git a/pkgs/misc/emulators/qmc2/default.nix b/pkgs/misc/emulators/qmc2/default.nix
index 2e47cead8ec2..65cc0bd9c05a 100644
--- a/pkgs/misc/emulators/qmc2/default.nix
+++ b/pkgs/misc/emulators/qmc2/default.nix
@@ -1,5 +1,5 @@
 { stdenv
-, fetchurl, qmake, qttools, pkgconfig
+, fetchurl, qttools, pkgconfig
 , minizip, zlib
 , qtbase, qtsvg, qtmultimedia, qtwebkit, qttranslations, qtxmlpatterns
 , rsync, SDL2, xwininfo
diff --git a/pkgs/misc/emulators/retrofe/default.nix b/pkgs/misc/emulators/retrofe/default.nix
index ffc494dad4ca..40c1fcc6fdef 100644
--- a/pkgs/misc/emulators/retrofe/default.nix
+++ b/pkgs/misc/emulators/retrofe/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchhg, cmake, dos2unix, glib, gst_all_1, makeWrapper, pkgconfig
+{ stdenv, fetchhg, cmake, glib, gst_all_1, makeWrapper, pkgconfig
 , python, SDL2, SDL2_image, SDL2_mixer, SDL2_ttf, sqlite, zlib
 }:
 
diff --git a/pkgs/misc/emulators/vbam/default.nix b/pkgs/misc/emulators/vbam/default.nix
index 66ea5b125757..ac078f622515 100644
--- a/pkgs/misc/emulators/vbam/default.nix
+++ b/pkgs/misc/emulators/vbam/default.nix
@@ -5,10 +5,6 @@
 , ffmpeg
 , gettext
 , gtk2-x11
-, libpng
-, libpthreadstubs
-, libXdmcp
-, libxshmfence
 , libGLU_combined
 , openal
 , pkgconfig
diff --git a/pkgs/misc/emulators/vice/default.nix b/pkgs/misc/emulators/vice/default.nix
index 010c4721dc2d..ae8fbe9e1f5e 100644
--- a/pkgs/misc/emulators/vice/default.nix
+++ b/pkgs/misc/emulators/vice/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, bison, flex, perl, libpng, giflib, libjpeg, alsaLib, readline, libGLU_combined, libX11, libXaw
+{ stdenv, fetchurl, bison, flex, perl, libpng, giflib, libjpeg, alsaLib, readline, libGLU_combined, libXaw
 , pkgconfig, gtk2, SDL, autoreconfHook, makeDesktopItem
 }:
 
diff --git a/pkgs/misc/emulators/wine/default.nix b/pkgs/misc/emulators/wine/default.nix
index ca67ca836ba0..a8eacbe234c6 100644
--- a/pkgs/misc/emulators/wine/default.nix
+++ b/pkgs/misc/emulators/wine/default.nix
@@ -6,7 +6,7 @@
 # };
 # Make additional configurations on demand:
 # wine.override { wineBuild = "wine32"; wineRelease = "staging"; };
-{ lib, pkgs, system, callPackage,
+{ lib, system, callPackage,
   wineRelease ? "stable",
   wineBuild ? (if system == "x86_64-linux" then "wineWow" else "wine32"),
   libtxc_dxtn_Name ? "libtxc_dxtn_s2tc",
diff --git a/pkgs/misc/emulators/wine/packages.nix b/pkgs/misc/emulators/wine/packages.nix
index 156db148435e..3ea60e62c665 100644
--- a/pkgs/misc/emulators/wine/packages.nix
+++ b/pkgs/misc/emulators/wine/packages.nix
@@ -1,4 +1,4 @@
-{ system, stdenv, stdenv_32bit, lib, pkgs, pkgsi686Linux, callPackage,
+{ stdenv_32bit, lib, pkgs, pkgsi686Linux, callPackage,
   wineRelease ? "stable",
   supportFlags
 }:
diff --git a/pkgs/misc/emulators/wine/staging.nix b/pkgs/misc/emulators/wine/staging.nix
index 4a7fe0ff55b6..5264e66279f7 100644
--- a/pkgs/misc/emulators/wine/staging.nix
+++ b/pkgs/misc/emulators/wine/staging.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, lib, wineUnstable, libtxc_dxtn_Name }:
+{ stdenv, callPackage, wineUnstable, libtxc_dxtn_Name }:
 
 with callPackage ./util.nix {};
 
diff --git a/pkgs/misc/ghostscript/default.nix b/pkgs/misc/ghostscript/default.nix
index 182e176cacba..5839b076c0de 100644
--- a/pkgs/misc/ghostscript/default.nix
+++ b/pkgs/misc/ghostscript/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, fetchpatch, pkgconfig, zlib, expat, openssl, autoconf
+{ stdenv, lib, fetchurl, pkgconfig, zlib, expat, openssl, autoconf
 , libjpeg, libpng, libtiff, freetype, fontconfig, lcms2, libpaper, jbig2dec
 , libiconv, ijs
 , x11Support ? false, xlibsWrapper ? null
diff --git a/pkgs/misc/jackaudio/default.nix b/pkgs/misc/jackaudio/default.nix
index 52b0abc48a7a..391ac107ab71 100644
--- a/pkgs/misc/jackaudio/default.nix
+++ b/pkgs/misc/jackaudio/default.nix
@@ -6,7 +6,6 @@
 # Optional Dependencies
 , dbus ? null, libffado ? null, alsaLib ? null
 , libopus ? null
-, darwin
 
 # Extra options
 , prefix ? ""
diff --git a/pkgs/misc/lilypond/unstable.nix b/pkgs/misc/lilypond/unstable.nix
index 046416cd9df2..df83502aa88a 100644
--- a/pkgs/misc/lilypond/unstable.nix
+++ b/pkgs/misc/lilypond/unstable.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchgit, guile, rsync, lilypond, gyre-fonts }:
+{ stdenv, fetchurl, fetchgit, rsync, lilypond, gyre-fonts }:
 
 with stdenv.lib;
 
diff --git a/pkgs/misc/my-env/default.nix b/pkgs/misc/my-env/default.nix
index d0b7458bf572..fb8de9b6a71f 100644
--- a/pkgs/misc/my-env/default.nix
+++ b/pkgs/misc/my-env/default.nix
@@ -59,7 +59,7 @@
 
 { mkDerivation, substituteAll, pkgs }:
     { stdenv ? pkgs.stdenv, name, buildInputs ? []
-    , propagatedBuildInputs ? [], gcc ? stdenv.cc, cTags ? [], extraCmds ? ""
+    , propagatedBuildInputs ? [], gcc ? stdenv.cc, extraCmds ? ""
     , cleanupCmds ? "", shell ? "${pkgs.bashInteractive}/bin/bash --norc"}:
 
 mkDerivation {
diff --git a/pkgs/misc/phabricator/default.nix b/pkgs/misc/phabricator/default.nix
index 435cf2e0c9a7..367e4e53442e 100644
--- a/pkgs/misc/phabricator/default.nix
+++ b/pkgs/misc/phabricator/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchgit, pkgs, ...  }:
+{ stdenv, pkgs }:
 
 stdenv.mkDerivation rec {
   version = "2014-07-16";
diff --git a/pkgs/misc/screensavers/slock/default.nix b/pkgs/misc/screensavers/slock/default.nix
index 82ce4c20df8e..5e658abff47d 100644
--- a/pkgs/misc/screensavers/slock/default.nix
+++ b/pkgs/misc/screensavers/slock/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, writeText
+{ stdenv, fetchurl, writeText
 , xproto, libX11, libXext, libXrandr
 # default header can be obtained from
 # https://git.suckless.org/slock/tree/config.def.h
diff --git a/pkgs/misc/themes/vertex/default.nix b/pkgs/misc/themes/vertex/default.nix
index 86a6b4883acf..06d42da79362 100644
--- a/pkgs/misc/themes/vertex/default.nix
+++ b/pkgs/misc/themes/vertex/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, autoreconfHook, pkgconfig, gnome3, gtk-engine-murrine }:
+{ stdenv, fetchFromGitHub, autoreconfHook, pkgconfig, gtk-engine-murrine }:
 
 stdenv.mkDerivation rec {
   name = "${pname}-${version}";
diff --git a/pkgs/misc/uboot/default.nix b/pkgs/misc/uboot/default.nix
index 2a628e0cdf49..2bf5274eeb46 100644
--- a/pkgs/misc/uboot/default.nix
+++ b/pkgs/misc/uboot/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, fetchpatch, bc, bison, dtc, flex, openssl, python2, swig
 , armTrustedFirmwareAllwinner
-, hostPlatform, buildPackages
+, buildPackages
 }:
 
 let
diff --git a/pkgs/misc/vim-plugins/default.nix b/pkgs/misc/vim-plugins/default.nix
index 8428a3b7894a..672e46409461 100644
--- a/pkgs/misc/vim-plugins/default.nix
+++ b/pkgs/misc/vim-plugins/default.nix
@@ -1,9 +1,9 @@
 # TODO check that no license information gets lost
-{ config, lib, fetchurl, stdenv, python, git, go, cmake, vim, vimUtils, perl, ruby
+{ config, lib, stdenv, python, cmake, vim, vimUtils, ruby
 , which, fetchgit, llvmPackages, rustPlatform
-, xkb_switch, rustracerd, fzf, skim
+, xkb_switch, fzf, skim
 , python3, boost, icu, ncurses
-, ycmd, makeWrapper, rake
+, ycmd, rake
 , pythonPackages, python3Packages
 , substituteAll
 , languagetool
diff --git a/pkgs/misc/vscode-extensions/cpptools/default.nix b/pkgs/misc/vscode-extensions/cpptools/default.nix
index 6cec206b73a4..5bc1dddeab8e 100644
--- a/pkgs/misc/vscode-extensions/cpptools/default.nix
+++ b/pkgs/misc/vscode-extensions/cpptools/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, fetchzip, vscode-utils, jq, mono46, clang-tools, writeScript
+{ stdenv, fetchzip, vscode-utils, jq, mono46, clang-tools, writeScript
 , gdbUseFixed ? true, gdb # The gdb default setting will be fixed to specified. Use version from `PATH` otherwise.
 }:
 
diff --git a/pkgs/misc/vscode-extensions/default.nix b/pkgs/misc/vscode-extensions/default.nix
index 16ddb8fd4052..68304d662243 100644
--- a/pkgs/misc/vscode-extensions/default.nix
+++ b/pkgs/misc/vscode-extensions/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, callPackage, vscode-utils }:
+{ stdenv, callPackage, vscode-utils }:
 
 let
   inherit (vscode-utils) buildVscodeExtension buildVscodeMarketplaceExtension
diff --git a/pkgs/misc/vscode-extensions/python/default.nix b/pkgs/misc/vscode-extensions/python/default.nix
index 41db2c1fcea3..c33359ccbfc8 100644
--- a/pkgs/misc/vscode-extensions/python/default.nix
+++ b/pkgs/misc/vscode-extensions/python/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, vscode-utils
+{ lib, vscode-utils
 
 , pythonUseFixed ? false, python  # When `true`, the python default setting will be fixed to specified.
                                   # Use version from `PATH` for default setting otherwise.
diff --git a/pkgs/misc/vscode-extensions/vscode-utils.nix b/pkgs/misc/vscode-extensions/vscode-utils.nix
index 4c095278f918..d7ec669204cd 100644
--- a/pkgs/misc/vscode-extensions/vscode-utils.nix
+++ b/pkgs/misc/vscode-extensions/vscode-utils.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, runCommand, vscode, unzip }:
+{ stdenv, lib, fetchurl, vscode, unzip }:
 
 let
   extendedPkgVersion = lib.getVersion vscode;
diff --git a/pkgs/os-specific/darwin/apple-source-releases/ICU/default.nix b/pkgs/os-specific/darwin/apple-source-releases/ICU/default.nix
index 6cf7ee07b70b..89ff68266a29 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/ICU/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/ICU/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, cctools, appleDerivation }:
+{ cctools, appleDerivation }:
 
 appleDerivation {
   nativeBuildInputs = [ cctools ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/Libc/825_40_1.nix b/pkgs/os-specific/darwin/apple-source-releases/Libc/825_40_1.nix
index 302a657992aa..29aa3d64cb08 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/Libc/825_40_1.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/Libc/825_40_1.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation, ed, unifdef }:
+{ appleDerivation, ed, unifdef }:
 
 appleDerivation {
   nativeBuildInputs = [ ed unifdef ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/Libc/default.nix b/pkgs/os-specific/darwin/apple-source-releases/Libc/default.nix
index d73dc8f3ec24..542ea20de11e 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/Libc/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/Libc/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation, ed, unifdef, Libc_old, Libc_10-9 }:
+{ appleDerivation, ed, unifdef, Libc_old, Libc_10-9 }:
 
 appleDerivation {
   nativeBuildInputs = [ ed unifdef ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/Libinfo/default.nix b/pkgs/os-specific/darwin/apple-source-releases/Libinfo/default.nix
index d3ffa1fa2834..add51a61d3d3 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/Libinfo/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/Libinfo/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation }:
+{ appleDerivation }:
 
 appleDerivation {
   installPhase = ''
diff --git a/pkgs/os-specific/darwin/apple-source-releases/Libm/default.nix b/pkgs/os-specific/darwin/apple-source-releases/Libm/default.nix
index 1a01d0321918..df5f6b7b8fd6 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/Libm/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/Libm/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation }:
+{ appleDerivation }:
 
 appleDerivation {
   installPhase = ''
diff --git a/pkgs/os-specific/darwin/apple-source-releases/Libnotify/default.nix b/pkgs/os-specific/darwin/apple-source-releases/Libnotify/default.nix
index de691a056f3e..2ee80d702646 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/Libnotify/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/Libnotify/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation }:
+{ appleDerivation }:
 
 appleDerivation {
   installPhase = ''
diff --git a/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix b/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix
index 386480d62902..1e27ead69f1b 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix
@@ -1,6 +1,6 @@
-{ stdenv, appleDerivation, cpio, bootstrap_cmds, xnu, Libc, Libm, libdispatch, cctools, Libinfo,
+{ stdenv, appleDerivation, cpio, xnu, Libc, Libm, libdispatch, cctools, Libinfo,
   dyld, Csu, architecture, libclosure, CarbonHeaders, ncurses, CommonCrypto, copyfile,
-  removefile, libresolv, Libnotify, libplatform, libpthread, mDNSResponder, launchd, libutil, version }:
+  removefile, libresolv, Libnotify, libplatform, libpthread, mDNSResponder, launchd, libutil }:
 
 appleDerivation rec {
   phases = [ "unpackPhase" "installPhase" ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/Security/default.nix b/pkgs/os-specific/darwin/apple-source-releases/Security/default.nix
index f09842630fdb..e04142b8b11e 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/Security/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/Security/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation }:
+{ appleDerivation }:
 
 appleDerivation {
   phases = [ "unpackPhase" "installPhase" ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/default.nix
index 35608587c569..318e2728fc2e 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation, fetchzip, version, bsdmake, perl, flex, yacc, writeScriptBin
+{ stdenv, appleDerivation, fetchzip, bsdmake, perl, flex, yacc
 }:
 
 # this derivation sucks
diff --git a/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/xcode.nix b/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/xcode.nix
index fda7cd85e4f7..7b1492799ddb 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/xcode.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/xcode.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation, fetchurl, xcbuild, ncurses, libutil-new }:
+{ stdenv, appleDerivation, xcbuild, ncurses, libutil-new }:
 
 appleDerivation {
   # We can't just run the root build, because https://github.com/facebook/xcbuild/issues/264
diff --git a/pkgs/os-specific/darwin/apple-source-releases/basic_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/basic_cmds/default.nix
index 596ca25d70a4..5d9781f3aa4a 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/basic_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/basic_cmds/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation, fetchurl, xcbuildHook }:
+{ stdenv, appleDerivation, xcbuildHook }:
 
 appleDerivation rec {
   nativeBuildInputs = [ xcbuildHook ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/bsdmake/default.nix b/pkgs/os-specific/darwin/apple-source-releases/bsdmake/default.nix
index baa3b11225d0..043c7b0bc70d 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/bsdmake/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/bsdmake/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation, fetchurl, fetchpatch, makeWrapper }:
+{ stdenv, appleDerivation, makeWrapper }:
 
 appleDerivation {
   nativeBuildInputs = [ makeWrapper ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/copyfile/default.nix b/pkgs/os-specific/darwin/apple-source-releases/copyfile/default.nix
index 37dffaa9b20e..7e1dc5309b1d 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/copyfile/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/copyfile/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation }:
+{ appleDerivation }:
 
 appleDerivation {
   dontBuild = true;
diff --git a/pkgs/os-specific/darwin/apple-source-releases/developer_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/developer_cmds/default.nix
index a572d46ceab5..4220c50d61cb 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/developer_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/developer_cmds/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, appleDerivation, xcbuildHook }:
+{ stdenv, appleDerivation, xcbuildHook }:
 
 appleDerivation rec {
   nativeBuildInputs = [ xcbuildHook ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/diskdev_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/diskdev_cmds/default.nix
index b947267ab14d..f27b5ae13022 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/diskdev_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/diskdev_cmds/default.nix
@@ -1,5 +1,5 @@
 { stdenv, appleDerivation, xcbuildHook
-, lib, hostPlatform, Libc, xnu, libutil-new }:
+, Libc, xnu, libutil-new }:
 
 appleDerivation {
   nativeBuildInputs = [ xcbuildHook ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/dtrace/default.nix b/pkgs/os-specific/darwin/apple-source-releases/dtrace/default.nix
index 5fcd04266d5a..fd2c95563b48 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/dtrace/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/dtrace/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation, cctools, zlib }:
+{ appleDerivation, cctools, zlib }:
 
 appleDerivation {
   buildInputs = [ cctools zlib ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/eap8021x/default.nix b/pkgs/os-specific/darwin/apple-source-releases/eap8021x/default.nix
index 80d629dfa3e6..b24d94b9d70d 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/eap8021x/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/eap8021x/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation }:
+{ appleDerivation }:
 
 appleDerivation {
   dontBuild = true;
diff --git a/pkgs/os-specific/darwin/apple-source-releases/launchd/default.nix b/pkgs/os-specific/darwin/apple-source-releases/launchd/default.nix
index 86bc6e598f7d..eed7982e9d8c 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/launchd/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/launchd/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation }:
+{ appleDerivation }:
 
 appleDerivation {
   # No clue why the same file has two different names. Ask Apple!
diff --git a/pkgs/os-specific/darwin/apple-source-releases/libclosure/default.nix b/pkgs/os-specific/darwin/apple-source-releases/libclosure/default.nix
index 826dbed1dfe0..ac33a24a8b4e 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/libclosure/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/libclosure/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation }:
+{ appleDerivation }:
 
 appleDerivation {
   installPhase = ''
diff --git a/pkgs/os-specific/darwin/apple-source-releases/libdispatch/default.nix b/pkgs/os-specific/darwin/apple-source-releases/libdispatch/default.nix
index a43c00f7691b..46e9e592ddc6 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/libdispatch/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/libdispatch/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation }:
+{ appleDerivation }:
 
 appleDerivation {
   dontConfigure = true;
diff --git a/pkgs/os-specific/darwin/apple-source-releases/libiconv/default.nix b/pkgs/os-specific/darwin/apple-source-releases/libiconv/default.nix
index d325e38b272e..3d62c3961221 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/libiconv/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/libiconv/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation, lib, autoreconfHook, targetPlatform
+{ stdenv, appleDerivation, lib, targetPlatform
 , enableStatic ? targetPlatform.isiOS
 , enableShared ? !targetPlatform.isiOS
 }:
diff --git a/pkgs/os-specific/darwin/apple-source-releases/libplatform/default.nix b/pkgs/os-specific/darwin/apple-source-releases/libplatform/default.nix
index 41b1bf74af9e..4fd0ab8a7fb2 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/libplatform/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/libplatform/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation }:
+{ appleDerivation }:
 
 appleDerivation {
   installPhase = ''
diff --git a/pkgs/os-specific/darwin/apple-source-releases/libresolv/default.nix b/pkgs/os-specific/darwin/apple-source-releases/libresolv/default.nix
index 5a2cd33d8a03..f3c7558cfc62 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/libresolv/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/libresolv/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation, Libinfo, configd, mDNSResponder }:
+{ appleDerivation, Libinfo, configd, mDNSResponder }:
 
 appleDerivation {
   buildInputs = [ Libinfo configd mDNSResponder ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/libsecurity_cdsa_utils/default.nix b/pkgs/os-specific/darwin/apple-source-releases/libsecurity_cdsa_utils/default.nix
index aa73c281cab2..e5637d6db410 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/libsecurity_cdsa_utils/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/libsecurity_cdsa_utils/default.nix
@@ -1,4 +1,4 @@
-{ Security, appleDerivation, libsecurity_cdsa_utilities, libsecurity_utilities, m4 }:
+{ appleDerivation, libsecurity_cdsa_utilities, libsecurity_utilities, m4 }:
 appleDerivation {
   buildInputs = [
     libsecurity_utilities
diff --git a/pkgs/os-specific/darwin/apple-source-releases/libsecurity_cssm/default.nix b/pkgs/os-specific/darwin/apple-source-releases/libsecurity_cssm/default.nix
index 053dea134c72..cf9fe411533f 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/libsecurity_cssm/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/libsecurity_cssm/default.nix
@@ -1,4 +1,4 @@
-{ appleDerivation, libsecurity_cdsa_client, libsecurity_cdsa_plugin, libsecurity_cdsa_utilities, libsecurity_codesigning, libsecurity_utilities, perl }:
+{ appleDerivation, libsecurity_cdsa_client, libsecurity_cdsa_plugin, libsecurity_cdsa_utilities, libsecurity_utilities, perl }:
 appleDerivation {
   buildInputs = [
     libsecurity_utilities
diff --git a/pkgs/os-specific/darwin/apple-source-releases/libsecurity_keychain/default.nix b/pkgs/os-specific/darwin/apple-source-releases/libsecurity_keychain/default.nix
index 07a3186caeec..609d07fda100 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/libsecurity_keychain/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/libsecurity_keychain/default.nix
@@ -1,4 +1,4 @@
-{ CF, Security, appleDerivation, apple_sdk, libsecurity_asn1, libsecurity_cdsa_client, libsecurity_cdsa_utilities, libsecurity_cdsa_utils, libsecurity_ocspd, libsecurity_pkcs12, libsecurity_utilities, libsecurityd, openssl, osx_private_sdk, security_dotmac_tp, lib }:
+{ CF, appleDerivation, apple_sdk, libsecurity_asn1, libsecurity_cdsa_client, libsecurity_cdsa_utilities, libsecurity_cdsa_utils, libsecurity_ocspd, libsecurity_pkcs12, libsecurity_utilities, libsecurityd, openssl, osx_private_sdk, security_dotmac_tp, lib }:
 appleDerivation {
   buildInputs = [
     libsecurity_utilities
diff --git a/pkgs/os-specific/darwin/apple-source-releases/libsecurity_utilities/default.nix b/pkgs/os-specific/darwin/apple-source-releases/libsecurity_utilities/default.nix
index e811c4c11a82..1ab950a9233c 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/libsecurity_utilities/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/libsecurity_utilities/default.nix
@@ -1,4 +1,4 @@
-{ IOKit, appleDerivation, apple_sdk, libauto, libobjc, libsecurity_codesigning, sqlite, stdenv, osx_private_sdk }:
+{ IOKit, appleDerivation, apple_sdk, libauto, libobjc, sqlite, stdenv, osx_private_sdk }:
 appleDerivation {
   buildInputs = [
     libauto
diff --git a/pkgs/os-specific/darwin/apple-source-releases/mDNSResponder/default.nix b/pkgs/os-specific/darwin/apple-source-releases/mDNSResponder/default.nix
index 63674808d93b..f17ed785360d 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/mDNSResponder/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/mDNSResponder/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation }:
+{ appleDerivation }:
 
 appleDerivation {
   phases = [ "unpackPhase" "installPhase" ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/objc4/default.nix b/pkgs/os-specific/darwin/apple-source-releases/objc4/default.nix
index cea5fc9a4e2c..5c78182085b5 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/objc4/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/objc4/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation }:
+{ appleDerivation }:
 
 appleDerivation {
   phases = [ "unpackPhase" "installPhase" ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/ppp/default.nix b/pkgs/os-specific/darwin/apple-source-releases/ppp/default.nix
index 17c24bebfda7..5668c376130e 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/ppp/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/ppp/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation }:
+{ appleDerivation }:
 
 appleDerivation {
   dontBuild = true;
diff --git a/pkgs/os-specific/darwin/apple-source-releases/removefile/default.nix b/pkgs/os-specific/darwin/apple-source-releases/removefile/default.nix
index 8baf62dba01b..2b45fbdb45e2 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/removefile/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/removefile/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation }:
+{ appleDerivation }:
 
 appleDerivation {
   installPhase = ''
diff --git a/pkgs/os-specific/darwin/apple-source-releases/system_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/system_cmds/default.nix
index 1bbda6ab7add..39c903a2e7b9 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/system_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/system_cmds/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation, xcbuild, lib, hostPlatform
+{ stdenv, appleDerivation, lib
 , Librpcsvc, apple_sdk, pam, CF, openbsm }:
 
 appleDerivation rec {
diff --git a/pkgs/os-specific/darwin/apple-source-releases/text_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/text_cmds/default.nix
index 08df235ed8c2..91abb3ca07a8 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/text_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/text_cmds/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation, fetchurl, xcbuildHook, ncurses, bzip2, zlib, lzma }:
+{ stdenv, appleDerivation, xcbuildHook, ncurses, bzip2, zlib, lzma }:
 
 appleDerivation {
   nativeBuildInputs = [ xcbuildHook ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/xnu/default.nix b/pkgs/os-specific/darwin/apple-source-releases/xnu/default.nix
index 2c7da5be6e4c..74c9f2543481 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/xnu/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/xnu/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appleDerivation, fetchzip, bootstrap_cmds, bison, flex, gnum4, unifdef, perl, python }:
+{ appleDerivation, bootstrap_cmds, bison, flex, gnum4, unifdef, perl, python }:
 
 appleDerivation {
   phases = [ "unpackPhase" "patchPhase" "installPhase" ];
diff --git a/pkgs/os-specific/darwin/binutils/default.nix b/pkgs/os-specific/darwin/binutils/default.nix
index 21d64979d7ea..bd10dde5572c 100644
--- a/pkgs/os-specific/darwin/binutils/default.nix
+++ b/pkgs/os-specific/darwin/binutils/default.nix
@@ -1,5 +1,4 @@
 { stdenv, binutils-unwrapped, cctools
-, hostPlatform, targetPlatform
 }:
 
 # Make sure both underlying packages claim to have prepended their binaries
diff --git a/pkgs/os-specific/darwin/cctools/port.nix b/pkgs/os-specific/darwin/cctools/port.nix
index 0c908197acb8..995e9af38cb8 100644
--- a/pkgs/os-specific/darwin/cctools/port.nix
+++ b/pkgs/os-specific/darwin/cctools/port.nix
@@ -1,5 +1,5 @@
-{ stdenv, fetchFromGitHub, makeWrapper, autoconf, automake, libtool_2, autoreconfHook
-, libcxx, libcxxabi, libuuid
+{ stdenv, fetchFromGitHub, autoconf, automake, libtool_2, autoreconfHook
+, libcxxabi, libuuid
 , libobjc ? null, maloader ? null
 , hostPlatform, targetPlatform
 , enableDumpNormalizedLibArgs ? false
diff --git a/pkgs/os-specific/darwin/darling/default.nix b/pkgs/os-specific/darwin/darling/default.nix
index c1e29843147c..6ed3b28eccc3 100644
--- a/pkgs/os-specific/darwin/darling/default.nix
+++ b/pkgs/os-specific/darwin/darling/default.nix
@@ -1,4 +1,4 @@
-{stdenv, lib, fetchzip, cmake, bison, flex}:
+{stdenv, lib, fetchzip}:
 
 stdenv.mkDerivation rec {
   pname = "darling";
diff --git a/pkgs/os-specific/darwin/security-tool/default.nix b/pkgs/os-specific/darwin/security-tool/default.nix
index 4566d82835f7..f161a7a88e17 100644
--- a/pkgs/os-specific/darwin/security-tool/default.nix
+++ b/pkgs/os-specific/darwin/security-tool/default.nix
@@ -1,4 +1,4 @@
-{ CoreServices, Foundation, PCSC, Security, GSS, Kerberos, makeWrapper, apple_sdk,
+{ Foundation, PCSC, Security, GSS, Kerberos, makeWrapper, apple_sdk,
 fetchurl, gnustep, libobjc, libsecurity_apple_csp, libsecurity_apple_cspdl,
 libsecurity_apple_file_dl, libsecurity_apple_x509_cl, libsecurity_apple_x509_tp,
 libsecurity_asn1, libsecurity_cdsa_client, libsecurity_cdsa_plugin,
diff --git a/pkgs/os-specific/darwin/swift-corelibs/default.nix b/pkgs/os-specific/darwin/swift-corelibs/default.nix
index fdc97304528d..dd652dc56273 100644
--- a/pkgs/os-specific/darwin/swift-corelibs/default.nix
+++ b/pkgs/os-specific/darwin/swift-corelibs/default.nix
@@ -1,4 +1,4 @@
-{callPackage, stdenv, darwin, xcbuild}:
+{callPackage, darwin}:
 
 rec {
   corefoundation = callPackage ./corefoundation.nix {};
diff --git a/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix b/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix
index d5ed21cd9e24..b848265736e6 100644
--- a/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix
+++ b/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix
@@ -1,4 +1,4 @@
-{ lib, hostPlatform, targetPlatform
+{ targetPlatform
 , clang-unwrapped
 , binutils-unwrapped
 , runCommand
diff --git a/pkgs/os-specific/linux/amdgpu-pro/default.nix b/pkgs/os-specific/linux/amdgpu-pro/default.nix
index df0ef80ff4d4..97658c831eb0 100644
--- a/pkgs/os-specific/linux/amdgpu-pro/default.nix
+++ b/pkgs/os-specific/linux/amdgpu-pro/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchurl, elfutils
 , xorg, patchelf, openssl, libdrm, udev
 , libxcb, libxshmfence, epoxy, perl, zlib
-, fetchFromGitHub, ncurses
+, ncurses
 , libsOnly ? false, kernel ? null
 }:
 
diff --git a/pkgs/os-specific/linux/autofs/default.nix b/pkgs/os-specific/linux/autofs/default.nix
index 859593e4b9aa..60ccad04eea4 100644
--- a/pkgs/os-specific/linux/autofs/default.nix
+++ b/pkgs/os-specific/linux/autofs/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, flex, bison, linuxHeaders, libtirpc, mount, umount, nfs-utils, e2fsprogs
+{ stdenv, fetchurl, flex, bison, linuxHeaders, libtirpc, mount, umount, nfs-utils, e2fsprogs
 , libxml2, kerberos, kmod, openldap, sssd, cyrus_sasl, openssl }:
 
 let
diff --git a/pkgs/os-specific/linux/bcc/default.nix b/pkgs/os-specific/linux/bcc/default.nix
index 3104004b3d67..2796fed17dc6 100644
--- a/pkgs/os-specific/linux/bcc/default.nix
+++ b/pkgs/os-specific/linux/bcc/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, makeWrapper, cmake, llvmPackages, kernel
+{ stdenv, fetchFromGitHub, makeWrapper, cmake, llvmPackages, kernel
 , flex, bison, elfutils, python, luajit, netperf, iperf, libelf
 , systemtap
 }:
diff --git a/pkgs/os-specific/linux/blcr/default.nix b/pkgs/os-specific/linux/blcr/default.nix
index 275600d42785..626e978f1f16 100644
--- a/pkgs/os-specific/linux/blcr/default.nix
+++ b/pkgs/os-specific/linux/blcr/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, kernel, perl, makeWrapper }:
+{ stdenv, fetchurl, kernel, perl, makeWrapper }:
 
 # BLCR version 0.8.6 should works with linux kernel up to version 3.17.x
 
diff --git a/pkgs/os-specific/linux/broadcom-sta/default.nix b/pkgs/os-specific/linux/broadcom-sta/default.nix
index 9423e7a33f4e..9848882f3b86 100644
--- a/pkgs/os-specific/linux/broadcom-sta/default.nix
+++ b/pkgs/os-specific/linux/broadcom-sta/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, kernel }:
+{ stdenv, fetchurl, kernel }:
 
 let
   version = "6.30.223.271";
diff --git a/pkgs/os-specific/linux/busybox/default.nix b/pkgs/os-specific/linux/busybox/default.nix
index 06a2d4301596..bfd79cb42dc5 100644
--- a/pkgs/os-specific/linux/busybox/default.nix
+++ b/pkgs/os-specific/linux/busybox/default.nix
@@ -1,9 +1,8 @@
-{ stdenv, lib, buildPackages, fetchurl, fetchpatch
+{ stdenv, lib, buildPackages, fetchurl
 , enableStatic ? false
 , enableMinimal ? false
 , useMusl ? stdenv.hostPlatform.libc == "musl", musl
 , extraConfig ? ""
-, buildPlatform, hostPlatform
 }:
 
 assert stdenv.hostPlatform.libc == "musl" -> useMusl;
diff --git a/pkgs/os-specific/linux/checksec/default.nix b/pkgs/os-specific/linux/checksec/default.nix
index 9b7f69d4ab89..a8ffb133a905 100644
--- a/pkgs/os-specific/linux/checksec/default.nix
+++ b/pkgs/os-specific/linux/checksec/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, file, findutils, binutils, glibc, procps, coreutils, sysctl }:
+{ stdenv, fetchurl, file, findutils, binutils, glibc, coreutils, sysctl }:
 
 stdenv.mkDerivation rec {
   name = "checksec-${version}";
diff --git a/pkgs/os-specific/linux/conky/default.nix b/pkgs/os-specific/linux/conky/default.nix
index e4c45a9440ab..eb4e6a16e38a 100644
--- a/pkgs/os-specific/linux/conky/default.nix
+++ b/pkgs/os-specific/linux/conky/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, pkgconfig, cmake
+{ stdenv, fetchFromGitHub, pkgconfig, cmake
 
 # dependencies
 , glib, libXinerama
diff --git a/pkgs/os-specific/linux/cpupower/default.nix b/pkgs/os-specific/linux/cpupower/default.nix
index d10b789f3e47..2b8efe7e7449 100644
--- a/pkgs/os-specific/linux/cpupower/default.nix
+++ b/pkgs/os-specific/linux/cpupower/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPackages, fetchurl, kernel, pciutils, gettext }:
+{ stdenv, buildPackages, kernel, pciutils, gettext }:
 
 stdenv.mkDerivation {
   name = "cpupower-${kernel.version}";
diff --git a/pkgs/os-specific/linux/criu/default.nix b/pkgs/os-specific/linux/criu/default.nix
index ad9b27f83fa9..832167b6f26a 100644
--- a/pkgs/os-specific/linux/criu/default.nix
+++ b/pkgs/os-specific/linux/criu/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, protobuf, protobufc, asciidoc
-, xmlto, utillinux, docbook_xsl, libpaper, libnl, libcap, libnet, pkgconfig
+, xmlto, docbook_xsl, libpaper, libnl, libcap, libnet, pkgconfig
 , python }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/os-specific/linux/cryptodev/default.nix b/pkgs/os-specific/linux/cryptodev/default.nix
index d25692b6cdf6..45a7fe177f2b 100644
--- a/pkgs/os-specific/linux/cryptodev/default.nix
+++ b/pkgs/os-specific/linux/cryptodev/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, kernel, onlyHeaders ? false }:
+{ fetchurl, stdenv, kernel ? false }:
 
 stdenv.mkDerivation rec {
   pname = "cryptodev-linux-1.9";
diff --git a/pkgs/os-specific/linux/dbus-broker/default.nix b/pkgs/os-specific/linux/dbus-broker/default.nix
index c57650e0806f..794ebd126fa4 100644
--- a/pkgs/os-specific/linux/dbus-broker/default.nix
+++ b/pkgs/os-specific/linux/dbus-broker/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchgit, fetchFromGitHub, docutils, meson, ninja, pkgconfig
+{ stdenv, fetchFromGitHub, docutils, meson, ninja, pkgconfig
 , dbus, glib, linuxHeaders, systemd }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/os-specific/linux/displaylink/default.nix b/pkgs/os-specific/linux/displaylink/default.nix
index 55be85d33f05..ad42590ad19c 100644
--- a/pkgs/os-specific/linux/displaylink/default.nix
+++ b/pkgs/os-specific/linux/displaylink/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, unzip, utillinux,
+{ stdenv, lib, unzip, utillinux,
   libusb1, evdi, systemd, makeWrapper, requireFile }:
 
 let
diff --git a/pkgs/os-specific/linux/ena/default.nix b/pkgs/os-specific/linux/ena/default.nix
index e3f382ababc3..180957ac2adf 100644
--- a/pkgs/os-specific/linux/ena/default.nix
+++ b/pkgs/os-specific/linux/ena/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, kernel, kmod }:
+{ stdenv, fetchFromGitHub, kernel }:
 
 stdenv.mkDerivation rec {
   version = "1.5.2";
diff --git a/pkgs/os-specific/linux/fatrace/default.nix b/pkgs/os-specific/linux/fatrace/default.nix
index 6f6418edc3e5..fb1a3e563884 100644
--- a/pkgs/os-specific/linux/fatrace/default.nix
+++ b/pkgs/os-specific/linux/fatrace/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, python3, which }:
+{ stdenv, fetchurl, python3, which }:
 
 stdenv.mkDerivation rec {
   name = "fatrace-${version}";
diff --git a/pkgs/os-specific/linux/firmware/firmware-linux-nonfree/default.nix b/pkgs/os-specific/linux/firmware/firmware-linux-nonfree/default.nix
index 724498b960c0..47d56cbf7967 100644
--- a/pkgs/os-specific/linux/firmware/firmware-linux-nonfree/default.nix
+++ b/pkgs/os-specific/linux/firmware/firmware-linux-nonfree/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchgit, runCommand, git, cacert, gnupg }:
+{ stdenv, fetchgit }:
 
 stdenv.mkDerivation rec {
   name = "firmware-linux-nonfree-${version}";
diff --git a/pkgs/os-specific/linux/fuse/common.nix b/pkgs/os-specific/linux/fuse/common.nix
index d813258f95a9..7cc58c19c07d 100644
--- a/pkgs/os-specific/linux/fuse/common.nix
+++ b/pkgs/os-specific/linux/fuse/common.nix
@@ -2,7 +2,6 @@
 
 { stdenv, fetchFromGitHub, fetchpatch
 , fusePackages, utillinux, gettext
-, autoconf, automake, libtool
 , meson, ninja, pkgconfig
 , autoreconfHook
 }:
diff --git a/pkgs/os-specific/linux/fuse/default.nix b/pkgs/os-specific/linux/fuse/default.nix
index cdbcca55d2ff..594f966c2f42 100644
--- a/pkgs/os-specific/linux/fuse/default.nix
+++ b/pkgs/os-specific/linux/fuse/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, utillinux }:
+{ callPackage, utillinux }:
 
 let
   mkFuse = args: callPackage (import ./common.nix args) {
diff --git a/pkgs/os-specific/linux/guvcview/default.nix b/pkgs/os-specific/linux/guvcview/default.nix
index 581d0f841b96..c8146c39cf59 100644
--- a/pkgs/os-specific/linux/guvcview/default.nix
+++ b/pkgs/os-specific/linux/guvcview/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, fetchurl, intltool, gettext, pkgconfig
-, gtk3, portaudio, libpng, SDL2, ffmpeg, udev, libusb1, libv4l, alsaLib, gsl
+{ stdenv, fetchurl, intltool, pkgconfig
+, gtk3, portaudio, SDL2, ffmpeg, udev, libusb1, libv4l, alsaLib, gsl
 , pulseaudioSupport ? true, libpulseaudio ? null }:
 
 assert pulseaudioSupport -> libpulseaudio != null;
diff --git a/pkgs/os-specific/linux/iproute/default.nix b/pkgs/os-specific/linux/iproute/default.nix
index 3f5ed788bb23..4204105bb605 100644
--- a/pkgs/os-specific/linux/iproute/default.nix
+++ b/pkgs/os-specific/linux/iproute/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, config, lib, flex, bash, bison, db, iptables, pkgconfig }:
+{ fetchurl, stdenv, config, flex, bash, bison, db, iptables, pkgconfig }:
 
 stdenv.mkDerivation rec {
   name = "iproute2-${version}";
diff --git a/pkgs/os-specific/linux/iputils/default.nix b/pkgs/os-specific/linux/iputils/default.nix
index d0a8950a5087..4caa0acb4b6a 100644
--- a/pkgs/os-specific/linux/iputils/default.nix
+++ b/pkgs/os-specific/linux/iputils/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl
-, sysfsutils, gnutls, openssl
+, sysfsutils, openssl
 , libcap, opensp, docbook_sgml_dtd_31
 , libidn, nettle
 , SGMLSpm, libgcrypt }:
diff --git a/pkgs/os-specific/linux/kernel-headers/default.nix b/pkgs/os-specific/linux/kernel-headers/default.nix
index 01cab57f7196..677bb076b0c8 100644
--- a/pkgs/os-specific/linux/kernel-headers/default.nix
+++ b/pkgs/os-specific/linux/kernel-headers/default.nix
@@ -1,5 +1,5 @@
 { stdenvNoCC, lib, buildPackages
-, buildPlatform, hostPlatform
+, hostPlatform
 , fetchurl, perl
 }:
 
diff --git a/pkgs/os-specific/linux/kernel/manual-config.nix b/pkgs/os-specific/linux/kernel/manual-config.nix
index fe46b9eab403..b2171067307f 100644
--- a/pkgs/os-specific/linux/kernel/manual-config.nix
+++ b/pkgs/os-specific/linux/kernel/manual-config.nix
@@ -1,8 +1,7 @@
 { buildPackages, runCommand, nettools, bc, bison, flex, perl, gmp, libmpc, mpfr, openssl
-, ncurses ? null
 , libelf
 , utillinux
-, writeTextFile, ubootTools
+, writeTextFile
 }:
 
 let
diff --git a/pkgs/os-specific/linux/kernel/patches.nix b/pkgs/os-specific/linux/kernel/patches.nix
index e0826aaa9d48..1a365046f5f3 100644
--- a/pkgs/os-specific/linux/kernel/patches.nix
+++ b/pkgs/os-specific/linux/kernel/patches.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, pkgs }:
+{ fetchpatch }:
 
 rec {
   bridge_stp_helper =
diff --git a/pkgs/os-specific/linux/keyutils/default.nix b/pkgs/os-specific/linux/keyutils/default.nix
index 201f170c2580..6932afdf478d 100644
--- a/pkgs/os-specific/linux/keyutils/default.nix
+++ b/pkgs/os-specific/linux/keyutils/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, gnumake, file }:
+{ stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
   name = "keyutils-${version}";
diff --git a/pkgs/os-specific/linux/lvm2/default.nix b/pkgs/os-specific/linux/lvm2/default.nix
index 0f542b9e3824..a24024112c95 100644
--- a/pkgs/os-specific/linux/lvm2/default.nix
+++ b/pkgs/os-specific/linux/lvm2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, pkgconfig, systemd, udev, utillinux, coreutils, libuuid
+{ stdenv, fetchurl, fetchpatch, pkgconfig, systemd, udev, utillinux, libuuid
 , thin-provisioning-tools, enable_dmeventd ? false }:
 
 let
diff --git a/pkgs/os-specific/linux/lxc/default.nix b/pkgs/os-specific/linux/lxc/default.nix
index 491f89f3cb44..3c158e228f37 100644
--- a/pkgs/os-specific/linux/lxc/default.nix
+++ b/pkgs/os-specific/linux/lxc/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, autoreconfHook, pkgconfig, perl, docbook2x
+{ stdenv, fetchurl, autoreconfHook, pkgconfig, perl, docbook2x
 , docbook_xml_dtd_45, python3Packages, pam
 
 # Optional Dependencies
diff --git a/pkgs/os-specific/linux/mbpfan/default.nix b/pkgs/os-specific/linux/mbpfan/default.nix
index a825314683ea..77b0d915edb6 100644
--- a/pkgs/os-specific/linux/mbpfan/default.nix
+++ b/pkgs/os-specific/linux/mbpfan/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, fetchpatch, gnugrep, kmod }:
+{ stdenv, lib, fetchFromGitHub }:
 
 stdenv.mkDerivation rec {
   name = "mbpfan-${version}";
diff --git a/pkgs/os-specific/linux/microcode/amd.nix b/pkgs/os-specific/linux/microcode/amd.nix
index 76a340529910..bd4b3d9377f7 100644
--- a/pkgs/os-specific/linux/microcode/amd.nix
+++ b/pkgs/os-specific/linux/microcode/amd.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, firmwareLinuxNonfree, libarchive }:
+{ stdenv, firmwareLinuxNonfree, libarchive }:
 
 stdenv.mkDerivation rec {
   name = "amd-ucode-${firmwareLinuxNonfree.version}";
diff --git a/pkgs/os-specific/linux/mkinitcpio-nfs-utils/default.nix b/pkgs/os-specific/linux/mkinitcpio-nfs-utils/default.nix
index f4e7ad1f2344..1b5925a55816 100644
--- a/pkgs/os-specific/linux/mkinitcpio-nfs-utils/default.nix
+++ b/pkgs/os-specific/linux/mkinitcpio-nfs-utils/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, xz }:
+{ stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
   name = "mkinitcpio-nfs-utils-0.3";
diff --git a/pkgs/os-specific/linux/musl/default.nix b/pkgs/os-specific/linux/musl/default.nix
index 6bcd2ea692d3..d6936ccd650e 100644
--- a/pkgs/os-specific/linux/musl/default.nix
+++ b/pkgs/os-specific/linux/musl/default.nix
@@ -1,5 +1,4 @@
 { stdenv, lib, fetchurl
-, buildPackages
 , linuxHeaders ? null
 , useBSDCompatHeaders ? true
 }:
diff --git a/pkgs/os-specific/linux/nvidia-x11/default.nix b/pkgs/os-specific/linux/nvidia-x11/default.nix
index 8eeaf502020d..6fcb28a985c8 100644
--- a/pkgs/os-specific/linux/nvidia-x11/default.nix
+++ b/pkgs/os-specific/linux/nvidia-x11/default.nix
@@ -1,4 +1,4 @@
-{ lib, callPackage, fetchurl, fetchpatch }:
+{ lib, callPackage, fetchurl }:
 
 let
   generic = args: callPackage (import ./generic.nix args) { };
diff --git a/pkgs/os-specific/linux/nvidia-x11/generic.nix b/pkgs/os-specific/linux/nvidia-x11/generic.nix
index b5435f23e71b..0ededc08050d 100644
--- a/pkgs/os-specific/linux/nvidia-x11/generic.nix
+++ b/pkgs/os-specific/linux/nvidia-x11/generic.nix
@@ -12,7 +12,7 @@
 , patches ? []
 }:
 
-{ stdenv, callPackage, pkgsi686Linux, fetchurl, fetchpatch
+{ stdenv, callPackage, pkgsi686Linux, fetchurl
 , kernel ? null, xorg, zlib, perl, nukeReferences
 , # Whether to build the libraries only (i.e. not the kernel module or
   # nvidia-settings).  Used to support 32-bit binaries on 64-bit
diff --git a/pkgs/os-specific/linux/nvidia-x11/persistenced.nix b/pkgs/os-specific/linux/nvidia-x11/persistenced.nix
index 21e6cb5d500b..474d3a69119c 100644
--- a/pkgs/os-specific/linux/nvidia-x11/persistenced.nix
+++ b/pkgs/os-specific/linux/nvidia-x11/persistenced.nix
@@ -1,6 +1,6 @@
 nvidia_x11: sha256:
 
-{ stdenv, lib, fetchurl, m4 }:
+{ stdenv, fetchurl, m4 }:
 
 stdenv.mkDerivation rec {
   name = "nvidia-persistenced-${nvidia_x11.version}";
diff --git a/pkgs/os-specific/linux/openvswitch/default.nix b/pkgs/os-specific/linux/openvswitch/default.nix
index ac8a1c7de4a8..a2a272f1b3a5 100644
--- a/pkgs/os-specific/linux/openvswitch/default.nix
+++ b/pkgs/os-specific/linux/openvswitch/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, makeWrapper, pkgconfig, utillinux, which
-, procps, libcap_ng, openssl, python27, iproute , perl
+, procps, libcap_ng, openssl, python27 , perl
 , kernel ? null }:
 
 with stdenv.lib;
diff --git a/pkgs/os-specific/linux/ply/default.nix b/pkgs/os-specific/linux/ply/default.nix
index 8ae731892768..43f184f384dd 100644
--- a/pkgs/os-specific/linux/ply/default.nix
+++ b/pkgs/os-specific/linux/ply/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, kernel, fetchFromGitHub, autoreconfHook, yacc, flex, bison, p7zip }:
+{ stdenv, kernel, fetchFromGitHub, autoreconfHook, yacc, flex, p7zip }:
 
 assert kernel != null -> stdenv.lib.versionAtLeast kernel.version "4.0";
 
diff --git a/pkgs/os-specific/linux/pmount/default.nix b/pkgs/os-specific/linux/pmount/default.nix
index 63d159e18842..1a7a31d978af 100644
--- a/pkgs/os-specific/linux/pmount/default.nix
+++ b/pkgs/os-specific/linux/pmount/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, cryptsetup, dbus, dbus-glib, intltool, ntfs3g, utillinux
+{ stdenv, fetchurl, intltool, ntfs3g, utillinux
 , mediaDir ? "/media/"
 , lockDir ? "/var/lock/pmount"
 , whiteList ? "/etc/pmount.allow"
diff --git a/pkgs/os-specific/linux/prl-tools/default.nix b/pkgs/os-specific/linux/prl-tools/default.nix
index 000d11af87d1..be93ff6f2eb9 100644
--- a/pkgs/os-specific/linux/prl-tools/default.nix
+++ b/pkgs/os-specific/linux/prl-tools/default.nix
@@ -1,8 +1,7 @@
-{ stdenv, lib, requireFile, makeWrapper, substituteAll, p7zip
+{ stdenv, lib, makeWrapper, p7zip
 , gawk, utillinux, xorg, glib, dbus-glib, zlib
 , kernel ? null, libsOnly ? false
 , undmg, fetchurl
-, libelf
 }:
 
 assert (!libsOnly) -> kernel != null;
diff --git a/pkgs/os-specific/linux/rtl8812au/default.nix b/pkgs/os-specific/linux/rtl8812au/default.nix
index 96306a9d5c6a..879c427b0494 100644
--- a/pkgs/os-specific/linux/rtl8812au/default.nix
+++ b/pkgs/os-specific/linux/rtl8812au/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, kernel, bc }:
+{ stdenv, fetchFromGitHub, kernel, bc }:
 
 stdenv.mkDerivation rec {
   name = "rtl8812au-${kernel.version}-${version}";
diff --git a/pkgs/os-specific/linux/rtl8814au/default.nix b/pkgs/os-specific/linux/rtl8814au/default.nix
index 99b42fc74007..c54d45773428 100644
--- a/pkgs/os-specific/linux/rtl8814au/default.nix
+++ b/pkgs/os-specific/linux/rtl8814au/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, kernel }:
+{ stdenv, fetchFromGitHub, kernel }:
 
 stdenv.mkDerivation rec {
   name = "rtl8814au-${kernel.version}-${version}";
diff --git a/pkgs/os-specific/linux/service-wrapper/default.nix b/pkgs/os-specific/linux/service-wrapper/default.nix
index 07a9b06ae76d..64e38b41a5fa 100644
--- a/pkgs/os-specific/linux/service-wrapper/default.nix
+++ b/pkgs/os-specific/linux/service-wrapper/default.nix
@@ -1,4 +1,4 @@
-{ lib, runCommand, substituteAll, fetchurl, systemd, coreutils }:
+{ lib, runCommand, substituteAll, coreutils }:
 
 let
   name = "service-wrapper-${version}";
diff --git a/pkgs/os-specific/linux/seturgent/default.nix b/pkgs/os-specific/linux/seturgent/default.nix
index 4491bb7bf936..42b5317d5562 100644
--- a/pkgs/os-specific/linux/seturgent/default.nix
+++ b/pkgs/os-specific/linux/seturgent/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, libX11, xproto, xdotool, unzip }:
+{ stdenv, fetchurl, libX11, xproto, unzip }:
 
 stdenv.mkDerivation {
   name = "seturgent-2012-08-17";
diff --git a/pkgs/os-specific/linux/sssd/default.nix b/pkgs/os-specific/linux/sssd/default.nix
index 99e4b09f46d8..0a55608af968 100644
--- a/pkgs/os-specific/linux/sssd/default.nix
+++ b/pkgs/os-specific/linux/sssd/default.nix
@@ -1,9 +1,9 @@
-{ stdenv, fetchurl, pkgs, lib, glibc, augeas, dnsutils, c-ares, curl,
+{ stdenv, fetchurl, pkgs, glibc, augeas, dnsutils, c-ares, curl,
   cyrus_sasl, ding-libs, libnl, libunistring, nss, samba, libnfsidmap, doxygen,
   python, python3, pam, popt, talloc, tdb, tevent, pkgconfig, ldb, openldap,
   pcre, kerberos, cifs-utils, glib, keyutils, dbus, fakeroot, libxslt, libxml2,
-  libuuid, docbook_xsl, ldap, systemd, nspr, check, cmocka, uid_wrapper,
-  nss_wrapper, docbook_xml_dtd_44, ncurses, Po4a, http-parser, jansson
+  libuuid, ldap, systemd, nspr, check, cmocka, uid_wrapper,
+  nss_wrapper, ncurses, Po4a, http-parser, jansson
   , withSudo ? false }:
 
 let
diff --git a/pkgs/os-specific/linux/sysdig/default.nix b/pkgs/os-specific/linux/sysdig/default.nix
index 6223c967619d..cdb1910d9c0e 100644
--- a/pkgs/os-specific/linux/sysdig/default.nix
+++ b/pkgs/os-specific/linux/sysdig/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, fetchFromGitHub, cmake, luajit, kernel, zlib, ncurses, perl, jsoncpp, libb64, openssl, curl, jq, gcc, fetchpatch}:
+{stdenv, fetchFromGitHub, cmake, luajit, kernel, zlib, ncurses, perl, jsoncpp, libb64, openssl, curl, jq, gcc}:
 
 with stdenv.lib;
 stdenv.mkDerivation rec {
diff --git a/pkgs/os-specific/linux/systemd/default.nix b/pkgs/os-specific/linux/systemd/default.nix
index 307ba9f43fa1..abb6efa29bfb 100644
--- a/pkgs/os-specific/linux/systemd/default.nix
+++ b/pkgs/os-specific/linux/systemd/default.nix
@@ -1,10 +1,10 @@
 { stdenv, fetchFromGitHub, fetchpatch, pkgconfig, intltool, gperf, libcap, kmod
-, zlib, xz, pam, acl, cryptsetup, libuuid, m4, utillinux, libffi
+, xz, pam, acl, libuuid, m4, utillinux, libffi
 , glib, kbd, libxslt, coreutils, libgcrypt, libgpgerror, libidn2, libapparmor
 , audit, lz4, bzip2, libmicrohttpd, pcre2
 , linuxHeaders ? stdenv.cc.libc.linuxHeaders
 , iptables, gnu-efi
-, autoreconfHook, gettext, docbook_xsl, docbook_xml_dtd_42, docbook_xml_dtd_45
+, gettext, docbook_xsl, docbook_xml_dtd_42, docbook_xml_dtd_45
 , ninja, meson, python3Packages, glibcLocales
 , patchelf
 , getent
diff --git a/pkgs/os-specific/linux/tbs/default.nix b/pkgs/os-specific/linux/tbs/default.nix
index 291666c0b450..fec70e8c485e 100644
--- a/pkgs/os-specific/linux/tbs/default.nix
+++ b/pkgs/os-specific/linux/tbs/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, kernel, kmod, perl, patchutils, perlPackages, libelf }:
+{ stdenv, lib, fetchFromGitHub, kernel, kmod, perl, patchutils, perlPackages }:
 let
 
   media = fetchFromGitHub rec {
diff --git a/pkgs/os-specific/linux/thunderbolt/default.nix b/pkgs/os-specific/linux/thunderbolt/default.nix
index 9d919aaaa938..ac687de8c9ab 100644
--- a/pkgs/os-specific/linux/thunderbolt/default.nix
+++ b/pkgs/os-specific/linux/thunderbolt/default.nix
@@ -4,7 +4,6 @@
 , fetchFromGitHub
 , pkgconfig
 , txt2tags
-, udev
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/os-specific/linux/trinity/default.nix b/pkgs/os-specific/linux/trinity/default.nix
index 4c3a92cd87e6..46b09dce4379 100644
--- a/pkgs/os-specific/linux/trinity/default.nix
+++ b/pkgs/os-specific/linux/trinity/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub, linuxHeaders }:
+{ stdenv, fetchFromGitHub }:
 
 stdenv.mkDerivation rec {
   name = "trinity-${version}";
diff --git a/pkgs/os-specific/linux/udisks/2-default.nix b/pkgs/os-specific/linux/udisks/2-default.nix
index 9f65d0a0316c..65c995558a4f 100644
--- a/pkgs/os-specific/linux/udisks/2-default.nix
+++ b/pkgs/os-specific/linux/udisks/2-default.nix
@@ -2,7 +2,7 @@
 , gnome3, gtk-doc, acl, systemd, glib, libatasmart, polkit, coreutils, bash
 , expat, libxslt, docbook_xsl, utillinux, mdadm, libgudev, libblockdev, parted
 , gobjectIntrospection, docbook_xml_dtd_412, docbook_xml_dtd_43
-, libxfs, f2fs-tools, dosfstools, e2fsprogs, btrfs-progs, exfat, nilfs-utils, udftools, ntfs3g
+, libxfs, f2fs-tools, dosfstools, e2fsprogs, btrfs-progs, exfat, nilfs-utils, ntfs3g
 }:
 
 let
diff --git a/pkgs/os-specific/linux/upower/default.nix b/pkgs/os-specific/linux/upower/default.nix
index 1e9101b68afe..c4af0bec9a23 100644
--- a/pkgs/os-specific/linux/upower/default.nix
+++ b/pkgs/os-specific/linux/upower/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, glib, dbus-glib
+{ stdenv, fetchurl, pkgconfig, dbus-glib
 , intltool, libxslt, docbook_xsl, udev, libgudev, libusb1
 , useSystemd ? true, systemd, gobjectIntrospection
 }:
diff --git a/pkgs/os-specific/linux/util-linux/default.nix b/pkgs/os-specific/linux/util-linux/default.nix
index 9ec6c22d32a5..35f32b0afdd8 100644
--- a/pkgs/os-specific/linux/util-linux/default.nix
+++ b/pkgs/os-specific/linux/util-linux/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pkgconfig, zlib, fetchpatch, shadow
+{ lib, stdenv, fetchurl, pkgconfig, zlib, shadow
 , ncurses ? null, perl ? null, pam, systemd, minimal ? false }:
 
 let
diff --git a/pkgs/os-specific/linux/virtualbox/default.nix b/pkgs/os-specific/linux/virtualbox/default.nix
index 72d7690d2f8a..9e2dee099cec 100644
--- a/pkgs/os-specific/linux/virtualbox/default.nix
+++ b/pkgs/os-specific/linux/virtualbox/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, virtualbox, kernel, strace }:
+{ stdenv, virtualbox, kernel }:
 
 stdenv.mkDerivation {
   name = "virtualbox-modules-${virtualbox.version}-${kernel.version}";
diff --git a/pkgs/os-specific/linux/wireguard/default.nix b/pkgs/os-specific/linux/wireguard/default.nix
index 42982d49ce87..8f9a565ecc77 100644
--- a/pkgs/os-specific/linux/wireguard/default.nix
+++ b/pkgs/os-specific/linux/wireguard/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchzip, kernel, wireguard-tools }:
+{ stdenv, kernel, wireguard-tools }:
 
 # module requires Linux >= 3.10 https://www.wireguard.io/install/#kernel-requirements
 assert stdenv.lib.versionAtLeast kernel.version "3.10";
diff --git a/pkgs/os-specific/linux/wpa_supplicant/default.nix b/pkgs/os-specific/linux/wpa_supplicant/default.nix
index 7b421aaff3d7..add7c6488562 100644
--- a/pkgs/os-specific/linux/wpa_supplicant/default.nix
+++ b/pkgs/os-specific/linux/wpa_supplicant/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchpatch, fetchurl, lib, openssl, pkgconfig, libnl
+{ stdenv, fetchurl, openssl, pkgconfig, libnl
 , dbus, readline ? null, pcsclite ? null
 }:
 
diff --git a/pkgs/os-specific/linux/wpa_supplicant/gui.nix b/pkgs/os-specific/linux/wpa_supplicant/gui.nix
index 06a38b291661..f4ef1b1498f8 100644
--- a/pkgs/os-specific/linux/wpa_supplicant/gui.nix
+++ b/pkgs/os-specific/linux/wpa_supplicant/gui.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, qtbase, qmake, inkscape, imagemagick, wpa_supplicant }:
+{ stdenv, qtbase, qmake, inkscape, imagemagick, wpa_supplicant }:
 
 stdenv.mkDerivation {
   name = "wpa_gui-${wpa_supplicant.version}";
diff --git a/pkgs/os-specific/linux/xf86-input-wacom/default.nix b/pkgs/os-specific/linux/xf86-input-wacom/default.nix
index b5937dff3752..e0e211642af7 100644
--- a/pkgs/os-specific/linux/xf86-input-wacom/default.nix
+++ b/pkgs/os-specific/linux/xf86-input-wacom/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl
-, file, inputproto, libX11, libXext, libXi, libXrandr, libXrender
+, inputproto, libX11, libXext, libXi, libXrandr, libXrender
 , ncurses, pkgconfig, randrproto, xorgserver, xproto, udev, libXinerama, pixman }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/os-specific/windows/pthread-w32/default.nix b/pkgs/os-specific/windows/pthread-w32/default.nix
index ef42dadc2973..7cd414a97b08 100644
--- a/pkgs/os-specific/windows/pthread-w32/default.nix
+++ b/pkgs/os-specific/windows/pthread-w32/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, mingw_header, hostPlatform, buildPlatform }:
+{ fetchurl, stdenv, hostPlatform, buildPlatform }:
 
 # This file is tweaked for cross-compilation only.
 assert hostPlatform != buildPlatform;
diff --git a/pkgs/servers/amqp/rabbitmq-server/default.nix b/pkgs/servers/amqp/rabbitmq-server/default.nix
index 4cc187846d0d..22a9aef8edab 100644
--- a/pkgs/servers/amqp/rabbitmq-server/default.nix
+++ b/pkgs/servers/amqp/rabbitmq-server/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, runCommand
+{ stdenv, fetchurl
 , erlang, python, libxml2, libxslt, xmlto
 , docbook_xml_dtd_45, docbook_xsl, zip, unzip, rsync
 , AppKit, Carbon, Cocoa
diff --git a/pkgs/servers/asterisk/default.nix b/pkgs/servers/asterisk/default.nix
index b1d60d8c1456..b2b681bcc8bd 100644
--- a/pkgs/servers/asterisk/default.nix
+++ b/pkgs/servers/asterisk/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, pkgs, lib, fetchurl, fetchgit, fetchsvn, fetchpatch,
+{ stdenv, lib, fetchurl, fetchsvn,
   jansson, libxml2, libxslt, ncurses, openssl, sqlite,
   utillinux, dmidecode, libuuid, newt,
   lua, speex,
diff --git a/pkgs/servers/caddy/default.nix b/pkgs/servers/caddy/default.nix
index 548d01c249d2..ee403ab49f09 100644
--- a/pkgs/servers/caddy/default.nix
+++ b/pkgs/servers/caddy/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildGoPackage, fetchFromGitHub, fetchpatch }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "caddy-${version}";
diff --git a/pkgs/servers/computing/storm/default.nix b/pkgs/servers/computing/storm/default.nix
index 90c87f8019d0..8335e40de98f 100644
--- a/pkgs/servers/computing/storm/default.nix
+++ b/pkgs/servers/computing/storm/default.nix
@@ -1,6 +1,6 @@
-{ stdenv, lib, fetchurl, zip, unzip, makeWrapper
+{ stdenv, lib, fetchurl, zip, unzip
 , jzmq, jdk, python
-, logsDir ? "", confFile ? "", extraLibraryPaths ? [], extraJars ? [] }:
+, confFile ? "", extraLibraryPaths ? [], extraJars ? [] }:
 
 stdenv.mkDerivation rec {
   name = "apache-storm-" + version;
diff --git a/pkgs/servers/consul/default.nix b/pkgs/servers/consul/default.nix
index d2ad5d0bd8e8..5cf192791000 100644
--- a/pkgs/servers/consul/default.nix
+++ b/pkgs/servers/consul/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, consul-ui, fetchFromGitHub }:
+{ stdenv, buildGoPackage, consul-ui, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "consul-${version}";
diff --git a/pkgs/servers/dict/dictd-wordnet.nix b/pkgs/servers/dict/dictd-wordnet.nix
index 13a78d61098b..8a1bb6313ad2 100644
--- a/pkgs/servers/dict/dictd-wordnet.nix
+++ b/pkgs/servers/dict/dictd-wordnet.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchsvn, python, wordnet, writeScript}:
+{stdenv, python, wordnet, writeScript}:
 
 stdenv.mkDerivation rec {
   version = "542";
diff --git a/pkgs/servers/dns/knot-resolver/default.nix b/pkgs/servers/dns/knot-resolver/default.nix
index bfa610b57d8a..90cbc6cec55d 100644
--- a/pkgs/servers/dns/knot-resolver/default.nix
+++ b/pkgs/servers/dns/knot-resolver/default.nix
@@ -2,7 +2,7 @@
 , knot-dns, luajit, libuv, lmdb, gnutls, nettle
 , cmocka, systemd, dns-root-data, makeWrapper
 , extraFeatures ? false /* catch-all if defaults aren't enough */
-, hiredis, libmemcached, luajitPackages
+, luajitPackages
 }:
 let # un-indented, over the whole file
 
diff --git a/pkgs/servers/dns/nsd/default.nix b/pkgs/servers/dns/nsd/default.nix
index 2c82b0bf33a8..1ac1d3948942 100644
--- a/pkgs/servers/dns/nsd/default.nix
+++ b/pkgs/servers/dns/nsd/default.nix
@@ -1,4 +1,4 @@
-{ config, stdenv, fetchurl, libevent, openssl
+{ stdenv, fetchurl, libevent, openssl
 , bind8Stats       ? false
 , checking         ? false
 , ipv6             ? true
diff --git a/pkgs/servers/etcd/default.nix b/pkgs/servers/etcd/default.nix
index 29cb8c2223c0..d6b71f816083 100644
--- a/pkgs/servers/etcd/default.nix
+++ b/pkgs/servers/etcd/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, libpcap, buildGoPackage, fetchFromGitHub }:
+{ lib, libpcap, buildGoPackage, fetchFromGitHub }:
 
 with lib;
 
diff --git a/pkgs/servers/exhibitor/default.nix b/pkgs/servers/exhibitor/default.nix
index c1234606291d..5e2381ada1d1 100644
--- a/pkgs/servers/exhibitor/default.nix
+++ b/pkgs/servers/exhibitor/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, buildMaven, maven, jdk, makeWrapper, stdenv, ... }:
+{ fetchFromGitHub, maven, jdk, makeWrapper, stdenv, ... }:
 stdenv.mkDerivation rec {
   name = "exhibitor-${version}";
   version = "1.5.6";
diff --git a/pkgs/servers/firebird/default.nix b/pkgs/servers/firebird/default.nix
index 24ed1dffd4d8..caf7d8360f07 100644
--- a/pkgs/servers/firebird/default.nix
+++ b/pkgs/servers/firebird/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, libedit, ncurses, automake, autoconf, libtool
+{stdenv, fetchurl, libedit, automake, autoconf, libtool
 ,
   # icu = null: use icu which comes with firebird
 
diff --git a/pkgs/servers/gotty/default.nix b/pkgs/servers/gotty/default.nix
index 89f1821981fc..ebade244bdf7 100644
--- a/pkgs/servers/gotty/default.nix
+++ b/pkgs/servers/gotty/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "gotty-${version}";
diff --git a/pkgs/servers/h2/default.nix b/pkgs/servers/h2/default.nix
index fc9d4c0508ed..c4be1f3c3b34 100644
--- a/pkgs/servers/h2/default.nix
+++ b/pkgs/servers/h2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchzip, jre, makeWrapper, unzip }:
+{ stdenv, fetchzip, jre, makeWrapper }:
 stdenv.mkDerivation rec {
   name = "h2-${version}";
 
diff --git a/pkgs/servers/hbase/default.nix b/pkgs/servers/hbase/default.nix
index dcd81fa44b05..6a33ac638d21 100644
--- a/pkgs/servers/hbase/default.nix
+++ b/pkgs/servers/hbase/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, jre, makeWrapper }:
+{ stdenv, fetchurl, makeWrapper }:
 stdenv.mkDerivation rec {
   name = "hbase-${version}";
   version = "0.98.24";
diff --git a/pkgs/servers/home-assistant/appdaemon.nix b/pkgs/servers/home-assistant/appdaemon.nix
index 493131795034..d921eee49cfc 100644
--- a/pkgs/servers/home-assistant/appdaemon.nix
+++ b/pkgs/servers/home-assistant/appdaemon.nix
@@ -1,4 +1,4 @@
-{ lib, python3, fetchpatch }:
+{ lib, python3 }:
 
 let
   python = python3.override {
diff --git a/pkgs/servers/http/couchdb/default.nix b/pkgs/servers/http/couchdb/default.nix
index 43334819dc56..5a873c7e84b1 100644
--- a/pkgs/servers/http/couchdb/default.nix
+++ b/pkgs/servers/http/couchdb/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, erlang, icu, openssl, spidermonkey, curl, help2man, python
+{ stdenv, fetchurl, erlang, icu, openssl, spidermonkey, curl, help2man
 , sphinx, which, file, pkgconfig, getopt }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/servers/http/jboss/jdbc/mysql/default.nix b/pkgs/servers/http/jboss/jdbc/mysql/default.nix
index dbc5c73414cd..fd2dec44c7f3 100644
--- a/pkgs/servers/http/jboss/jdbc/mysql/default.nix
+++ b/pkgs/servers/http/jboss/jdbc/mysql/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, jboss, mysql_jdbc }:
+{ stdenv, mysql_jdbc }:
 
 stdenv.mkDerivation {
   name = "jboss-mysql-jdbc";
diff --git a/pkgs/servers/http/nginx/generic.nix b/pkgs/servers/http/nginx/generic.nix
index 448695930039..643e7ed719a4 100644
--- a/pkgs/servers/http/nginx/generic.nix
+++ b/pkgs/servers/http/nginx/generic.nix
@@ -1,10 +1,9 @@
-{ stdenv, fetchurl, fetchFromGitHub, openssl, zlib, pcre, libxml2, libxslt, expat
+{ stdenv, fetchurl, openssl, zlib, pcre, libxml2, libxslt
 , gd, geoip
 , withDebug ? false
 , withStream ? true
 , withMail ? false
 , modules ? []
-, hardening ? true
 , version, sha256, ...
 }:
 
diff --git a/pkgs/servers/http/nginx/modules.nix b/pkgs/servers/http/nginx/modules.nix
index 1f6fcc319435..0910a6d05844 100644
--- a/pkgs/servers/http/nginx/modules.nix
+++ b/pkgs/servers/http/nginx/modules.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, fetchurl, lib, pkgs }:
+{ fetchFromGitHub, lib, pkgs }:
 
 {
   brotli = {
diff --git a/pkgs/servers/http/nix-binary-cache/default.nix b/pkgs/servers/http/nix-binary-cache/default.nix
index 33801c8cd326..479c9e41aa91 100644
--- a/pkgs/servers/http/nix-binary-cache/default.nix
+++ b/pkgs/servers/http/nix-binary-cache/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl
+{stdenv
 , coreutils, findutils, nix, xz, bzip2, gnused, gnugrep, openssl
 , lighttpd, iproute }:
 stdenv.mkDerivation rec {
diff --git a/pkgs/servers/http/openresty/default.nix b/pkgs/servers/http/openresty/default.nix
index 1155bac75703..1fe48e84fac7 100644
--- a/pkgs/servers/http/openresty/default.nix
+++ b/pkgs/servers/http/openresty/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchgit, openssl, zlib, pcre, postgresql, libxml2, libxslt,
+{ stdenv, fetchurl, openssl, zlib, pcre, postgresql, libxml2, libxslt,
 gd, geoip, perl }:
 
 with stdenv.lib;
diff --git a/pkgs/servers/interlock/default.nix b/pkgs/servers/interlock/default.nix
index 0df055f9690f..f57c94cd1084 100644
--- a/pkgs/servers/interlock/default.nix
+++ b/pkgs/servers/interlock/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, sudo, coreutils, systemd, cryptsetup
+{ sudo, coreutils, systemd, cryptsetup
 , mount, umount
 , buildGoPackage, fetchFromGitHub }:
 
diff --git a/pkgs/servers/isso/default.nix b/pkgs/servers/isso/default.nix
index 5aafe55512be..9e8a9dc9ec60 100644
--- a/pkgs/servers/isso/default.nix
+++ b/pkgs/servers/isso/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, python2, fetchurl, fetchFromGitHub }:
+{ stdenv, python2, fetchFromGitHub }:
 
 let python = python2.override {
   packageOverrides = self: super: {
diff --git a/pkgs/servers/ldap/389/default.nix b/pkgs/servers/ldap/389/default.nix
index 6826df5f6e86..4276a51715a6 100644
--- a/pkgs/servers/ldap/389/default.nix
+++ b/pkgs/servers/ldap/389/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, pkgconfig, perl, pam, nspr, nss, openldap
+{ stdenv, fetchurl, pkgconfig, perl, pam, nspr, nss, openldap
 , db, cyrus_sasl, svrcore, icu, net_snmp, kerberos, pcre, perlPackages
 }:
 let
diff --git a/pkgs/servers/mail/dovecot/default.nix b/pkgs/servers/mail/dovecot/default.nix
index e676246a08ec..5a9d8e61b1fe 100644
--- a/pkgs/servers/mail/dovecot/default.nix
+++ b/pkgs/servers/mail/dovecot/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, fetchpatch, perl, pkgconfig, systemd, openssl
+{ stdenv, lib, fetchurl, perl, pkgconfig, systemd, openssl
 , bzip2, zlib, lz4, inotify-tools, pam, libcap
 , clucene_core_2, icu, openldap, libsodium, libstemmer
 # Auth modules
diff --git a/pkgs/servers/mail/mlmmj/default.nix b/pkgs/servers/mail/mlmmj/default.nix
index f11400c190af..98b270ad7d41 100644
--- a/pkgs/servers/mail/mlmmj/default.nix
+++ b/pkgs/servers/mail/mlmmj/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig }:
+{ stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
 
diff --git a/pkgs/servers/matrix-synapse/default.nix b/pkgs/servers/matrix-synapse/default.nix
index 302aa8d55932..8c86cc6577a7 100644
--- a/pkgs/servers/matrix-synapse/default.nix
+++ b/pkgs/servers/matrix-synapse/default.nix
@@ -1,4 +1,4 @@
-{ lib, pkgs, stdenv, pythonPackages, fetchurl, fetchFromGitHub, fetchpatch }:
+{ stdenv, pythonPackages, fetchurl, fetchFromGitHub }:
 let
   matrix-angular-sdk = pythonPackages.buildPythonPackage rec {
     name = "matrix-angular-sdk-${version}";
diff --git a/pkgs/servers/mesos-dns/default.nix b/pkgs/servers/mesos-dns/default.nix
index 53c87745e67a..fe1f1c6760d8 100644
--- a/pkgs/servers/mesos-dns/default.nix
+++ b/pkgs/servers/mesos-dns/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "mesos-dns-${version}";
diff --git a/pkgs/servers/mirrorbits/default.nix b/pkgs/servers/mirrorbits/default.nix
index 98ac1534cf8a..10c8811c548f 100644
--- a/pkgs/servers/mirrorbits/default.nix
+++ b/pkgs/servers/mirrorbits/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub, fetchpatch
+{ lib, buildGoPackage, fetchFromGitHub, fetchpatch
 , pkgconfig, zlib, geoip }:
 
 buildGoPackage rec {
diff --git a/pkgs/servers/monitoring/cadvisor/default.nix b/pkgs/servers/monitoring/cadvisor/default.nix
index 0480d056c592..0e256d907dc2 100644
--- a/pkgs/servers/monitoring/cadvisor/default.nix
+++ b/pkgs/servers/monitoring/cadvisor/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, go, fetchFromGitHub }:
+{ stdenv, go, fetchFromGitHub }:
 
 stdenv.mkDerivation rec {
   name = "cadvisor-${version}";
diff --git a/pkgs/servers/monitoring/consul-alerts/default.nix b/pkgs/servers/monitoring/consul-alerts/default.nix
index 646a7856788b..a888549bb6aa 100644
--- a/pkgs/servers/monitoring/consul-alerts/default.nix
+++ b/pkgs/servers/monitoring/consul-alerts/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "consul-alerts-${version}";
diff --git a/pkgs/servers/monitoring/fusion-inventory/default.nix b/pkgs/servers/monitoring/fusion-inventory/default.nix
index 34b4e87bf65c..96eaa5ef0cc4 100644
--- a/pkgs/servers/monitoring/fusion-inventory/default.nix
+++ b/pkgs/servers/monitoring/fusion-inventory/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, buildPerlPackage, perlPackages, gnused, nix, dmidecode, pciutils, usbutils, iproute, nettools
+{ stdenv, lib, fetchurl, buildPerlPackage, perlPackages, nix, dmidecode, pciutils, usbutils, iproute, nettools
 , fetchFromGitHub, makeWrapper
 }:
 
diff --git a/pkgs/servers/monitoring/kapacitor/default.nix b/pkgs/servers/monitoring/kapacitor/default.nix
index 409801e8b7dc..0e21069bbb0e 100644
--- a/pkgs/servers/monitoring/kapacitor/default.nix
+++ b/pkgs/servers/monitoring/kapacitor/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 
 buildGoPackage rec {
   name = "kapacitor-${version}";
diff --git a/pkgs/servers/monitoring/lcdproc/default.nix b/pkgs/servers/monitoring/lcdproc/default.nix
index 859849f7b2c7..af5f2880a0f8 100644
--- a/pkgs/servers/monitoring/lcdproc/default.nix
+++ b/pkgs/servers/monitoring/lcdproc/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, autoreconfHook, makeWrapper, pkgconfig
-, doxygen, freetype, libX11, libftdi, libftdi1, libusb, libusb1, ncurses, perl }:
+, doxygen, freetype, libX11, libftdi, libusb, libusb1, ncurses, perl }:
 
 stdenv.mkDerivation rec {
   name = "lcdproc-${version}";
diff --git a/pkgs/servers/monitoring/plugins/labs_consol_de.nix b/pkgs/servers/monitoring/plugins/labs_consol_de.nix
index 957aee43691a..5d93f4c53496 100644
--- a/pkgs/servers/monitoring/plugins/labs_consol_de.nix
+++ b/pkgs/servers/monitoring/plugins/labs_consol_de.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchurl, buildPerlPackage, autoreconfHook, makeWrapper
+{ stdenv, fetchFromGitHub, fetchurl, autoreconfHook, makeWrapper
 , perl, DBDsybase, NetSNMP, coreutils, gnused, gnugrep }:
 
 let
diff --git a/pkgs/servers/monitoring/prometheus/blackbox-exporter.nix b/pkgs/servers/monitoring/prometheus/blackbox-exporter.nix
index 798f31c3458e..1f342adebaa0 100644
--- a/pkgs/servers/monitoring/prometheus/blackbox-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/blackbox-exporter.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "blackbox_exporter-${version}";
diff --git a/pkgs/servers/monitoring/prometheus/collectd-exporter.nix b/pkgs/servers/monitoring/prometheus/collectd-exporter.nix
index 2bd9b6af0748..0d6fbac60e5d 100644
--- a/pkgs/servers/monitoring/prometheus/collectd-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/collectd-exporter.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "collectd-exporter-${version}";
diff --git a/pkgs/servers/monitoring/prometheus/fritzbox-exporter.nix b/pkgs/servers/monitoring/prometheus/fritzbox-exporter.nix
index 2e7a4932de62..1271b3d40e14 100644
--- a/pkgs/servers/monitoring/prometheus/fritzbox-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/fritzbox-exporter.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "fritzbox-exporter-${version}";
diff --git a/pkgs/servers/monitoring/prometheus/json-exporter.nix b/pkgs/servers/monitoring/prometheus/json-exporter.nix
index ea17c0b18b23..ffba472bdc33 100644
--- a/pkgs/servers/monitoring/prometheus/json-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/json-exporter.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ stdenv, buildGoPackage, fetchFromGitHub, lib }:
+{ buildGoPackage, fetchFromGitHub, lib }:
 
 buildGoPackage rec {
   name = "prometheus-json-exporter-${version}";
diff --git a/pkgs/servers/monitoring/prometheus/mesos-exporter.nix b/pkgs/servers/monitoring/prometheus/mesos-exporter.nix
index 42ff2496df12..ade9bb87d993 100644
--- a/pkgs/servers/monitoring/prometheus/mesos-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/mesos-exporter.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "mesos_exporter-${version}";
diff --git a/pkgs/servers/monitoring/prometheus/minio-exporter/default.nix b/pkgs/servers/monitoring/prometheus/minio-exporter/default.nix
index 59314f1f282a..8b6c54d41f91 100644
--- a/pkgs/servers/monitoring/prometheus/minio-exporter/default.nix
+++ b/pkgs/servers/monitoring/prometheus/minio-exporter/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub, fetchpatch }:
+{ stdenv, buildGoPackage, fetchFromGitHub, fetchpatch }:
 
 buildGoPackage rec {
   name = "minio-exporter-${version}";
diff --git a/pkgs/servers/monitoring/prometheus/prom2json.nix b/pkgs/servers/monitoring/prometheus/prom2json.nix
index 788fe8633967..5e4ebb581400 100644
--- a/pkgs/servers/monitoring/prometheus/prom2json.nix
+++ b/pkgs/servers/monitoring/prometheus/prom2json.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "prom2json-${version}";
diff --git a/pkgs/servers/monitoring/prometheus/snmp-exporter.nix b/pkgs/servers/monitoring/prometheus/snmp-exporter.nix
index 9692354ad8a8..29454dd44d2b 100644
--- a/pkgs/servers/monitoring/prometheus/snmp-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/snmp-exporter.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, go, buildGoPackage, fetchFromGitHub, net_snmp }:
+{ stdenv, buildGoPackage, fetchFromGitHub, net_snmp }:
 
 buildGoPackage rec {
   name = "snmp_exporter-${version}";
diff --git a/pkgs/servers/monitoring/prometheus/statsd-bridge.nix b/pkgs/servers/monitoring/prometheus/statsd-bridge.nix
index f4d9f5a85037..e5480e020372 100644
--- a/pkgs/servers/monitoring/prometheus/statsd-bridge.nix
+++ b/pkgs/servers/monitoring/prometheus/statsd-bridge.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "statsd_exporter-${version}";
diff --git a/pkgs/servers/monitoring/prometheus/surfboard-exporter.nix b/pkgs/servers/monitoring/prometheus/surfboard-exporter.nix
index 13e17d0b0192..0c5cc6267659 100644
--- a/pkgs/servers/monitoring/prometheus/surfboard-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/surfboard-exporter.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "surfboard_exporter-${version}";
diff --git a/pkgs/servers/monitoring/prometheus/unifi-exporter/default.nix b/pkgs/servers/monitoring/prometheus/unifi-exporter/default.nix
index 44a670b95ab4..18fa3f98db23 100644
--- a/pkgs/servers/monitoring/prometheus/unifi-exporter/default.nix
+++ b/pkgs/servers/monitoring/prometheus/unifi-exporter/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "unifi-exporter-${version}";
diff --git a/pkgs/servers/monitoring/prometheus/varnish-exporter.nix b/pkgs/servers/monitoring/prometheus/varnish-exporter.nix
index d83aa5b46658..b23270cd8c1e 100644
--- a/pkgs/servers/monitoring/prometheus/varnish-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/varnish-exporter.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ stdenv, lib, buildGoPackage, fetchFromGitHub, makeWrapper, varnish }:
+{ lib, buildGoPackage, fetchFromGitHub, makeWrapper, varnish }:
 
 buildGoPackage rec {
   name = "prometheus_varnish_exporter-${version}";
diff --git a/pkgs/servers/monitoring/zabbix/2.0.nix b/pkgs/servers/monitoring/zabbix/2.0.nix
index d3816cf1ecdb..9f1a2baeb9ac 100644
--- a/pkgs/servers/monitoring/zabbix/2.0.nix
+++ b/pkgs/servers/monitoring/zabbix/2.0.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, postgresql, curl, openssl, zlib, gettext
+{ stdenv, fetchurl, pkgconfig, postgresql, curl, openssl, zlib
 , enableJabber ? false, minmay ? null }:
 
 assert enableJabber -> minmay != null;
diff --git a/pkgs/servers/monitoring/zabbix/2.2.nix b/pkgs/servers/monitoring/zabbix/2.2.nix
index bc5556d4bc00..bf3849e6524b 100644
--- a/pkgs/servers/monitoring/zabbix/2.2.nix
+++ b/pkgs/servers/monitoring/zabbix/2.2.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, postgresql, curl, openssl, zlib, gettext
+{ stdenv, fetchurl, pkgconfig, postgresql, curl, openssl, zlib
 , net_snmp , libssh2, openldap
 , enableJabber ? false, minmay ? null
 , enableSnmp ? false
diff --git a/pkgs/servers/monitoring/zabbix/3.4.nix b/pkgs/servers/monitoring/zabbix/3.4.nix
index 69b3577720f5..047ce0a5130e 100644
--- a/pkgs/servers/monitoring/zabbix/3.4.nix
+++ b/pkgs/servers/monitoring/zabbix/3.4.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, postgresql, curl, openssl, zlib, pcre, libevent, libiconv }:
+{ stdenv, fetchurl, pcre, libiconv }:
 
 
 let
diff --git a/pkgs/servers/mpd/default.nix b/pkgs/servers/mpd/default.nix
index 35637e7f73ac..f8523e8607d3 100644
--- a/pkgs/servers/mpd/default.nix
+++ b/pkgs/servers/mpd/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, autoreconfHook, pkgconfig, glib, systemd, boost, darwin
+{ stdenv, fetchFromGitHub, autoreconfHook, pkgconfig, glib, systemd, boost, darwin
 , alsaSupport ? true, alsaLib
 , avahiSupport ? true, avahi, dbus
 , flacSupport ? true, flac
diff --git a/pkgs/servers/nextcloud/default.nix b/pkgs/servers/nextcloud/default.nix
index 0121d748129b..3d6a1aa9c6fa 100644
--- a/pkgs/servers/nextcloud/default.nix
+++ b/pkgs/servers/nextcloud/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch }:
+{ stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
   name= "nextcloud-${version}";
diff --git a/pkgs/servers/nosql/arangodb/default.nix b/pkgs/servers/nosql/arangodb/default.nix
index 9b21deecf4b3..f3d3fed23a41 100644
--- a/pkgs/servers/nosql/arangodb/default.nix
+++ b/pkgs/servers/nosql/arangodb/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub
-, openssl, zlib, python2Packages, readline, cmake, python }:
+, openssl, zlib, readline, cmake, python }:
 
 let
 in stdenv.mkDerivation rec {
diff --git a/pkgs/servers/nosql/eventstore/default.nix b/pkgs/servers/nosql/eventstore/default.nix
index f97a3a5c1842..1d3240fae716 100644
--- a/pkgs/servers/nosql/eventstore/default.nix
+++ b/pkgs/servers/nosql/eventstore/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, git, mono, v8 }:
+{ stdenv, fetchFromGitHub, git, mono, v8 }:
 
 # There are some similarities with the pinta derivation. We should
 # have a helper to make it easy to package these Mono apps.
diff --git a/pkgs/servers/nosql/mongodb/default.nix b/pkgs/servers/nosql/mongodb/default.nix
index b9e850e8dfd4..c62ade1a20bb 100644
--- a/pkgs/servers/nosql/mongodb/default.nix
+++ b/pkgs/servers/nosql/mongodb/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, fetchpatch, scons, boost, gperftools, pcre-cpp, snappy
-, zlib, libyamlcpp, sasl, openssl, libpcap, wiredtiger, Security
+, zlib, libyamlcpp, sasl, openssl, libpcap, Security
 }:
 
 # Note:
diff --git a/pkgs/servers/nosql/rethinkdb/default.nix b/pkgs/servers/nosql/rethinkdb/default.nix
index e935b5d09879..d6ee407e3418 100644
--- a/pkgs/servers/nosql/rethinkdb/default.nix
+++ b/pkgs/servers/nosql/rethinkdb/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, which, m4, python
+{ stdenv, fetchurl, which, m4
 , protobuf, boost, zlib, curl, openssl, icu, jemalloc, libtool
 , python2Packages, makeWrapper
 }:
diff --git a/pkgs/servers/nosql/riak-cs/2.1.1.nix b/pkgs/servers/nosql/riak-cs/2.1.1.nix
index 9075756c1621..cf807e70596d 100644
--- a/pkgs/servers/nosql/riak-cs/2.1.1.nix
+++ b/pkgs/servers/nosql/riak-cs/2.1.1.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, unzip, erlang, git, wget, which, pam, coreutils, riak
+{ stdenv, lib, fetchurl, unzip, erlang, git, wget, which, pam
 , Carbon ? null, Cocoa ? null }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/servers/nosql/riak-cs/stanchion.nix b/pkgs/servers/nosql/riak-cs/stanchion.nix
index a064049072c9..1524ca207009 100644
--- a/pkgs/servers/nosql/riak-cs/stanchion.nix
+++ b/pkgs/servers/nosql/riak-cs/stanchion.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, unzip, erlang, git, wget, which, pam, coreutils, riak 
+{ stdenv, lib, fetchurl, unzip, erlang, git, wget, which, pam 
 , Carbon ? null, Cocoa ? null }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/servers/nosql/riak/2.2.0.nix b/pkgs/servers/nosql/riak/2.2.0.nix
index e4c9b90ab145..b041aa9f35fc 100644
--- a/pkgs/servers/nosql/riak/2.2.0.nix
+++ b/pkgs/servers/nosql/riak/2.2.0.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, unzip, erlang, which, pam, coreutils }:
+{ stdenv, lib, fetchurl, unzip, erlang, which, pam }:
 
 let
   solrName = "solr-4.10.4-yz-2.tgz";
diff --git a/pkgs/servers/nsq/default.nix b/pkgs/servers/nsq/default.nix
index fa78c876c1ec..d48587c924e7 100644
--- a/pkgs/servers/nsq/default.nix
+++ b/pkgs/servers/nsq/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "nsq-${version}";
diff --git a/pkgs/servers/openafs/1.6/default.nix b/pkgs/servers/openafs/1.6/default.nix
index 3f92299c2a0a..22f09994ebf0 100644
--- a/pkgs/servers/openafs/1.6/default.nix
+++ b/pkgs/servers/openafs/1.6/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchgit, which, autoconf, automake, flex, yacc
+{ stdenv, fetchurl, which, autoconf, automake, flex, yacc
 , glibc, perl, kerberos, libxslt, docbook_xsl, docbook_xml_dtd_43
 , ncurses # Extra ncurses utilities. Only needed for debugging.
 , tsmbac ? null # Tivoli Storage Manager Backup Client from IBM
diff --git a/pkgs/servers/openafs/1.8/default.nix b/pkgs/servers/openafs/1.8/default.nix
index 59c15839b393..fc6b1bc2426b 100644
--- a/pkgs/servers/openafs/1.8/default.nix
+++ b/pkgs/servers/openafs/1.8/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchgit, which, autoconf, automake, flex, yacc
+{ stdenv, fetchurl, which, autoconf, automake, flex, yacc
 , glibc, perl, kerberos, libxslt, docbook_xsl, docbook_xml_dtd_43
 , libtool_2, removeReferencesTo
 , ncurses # Extra ncurses utilities. Only needed for debugging.
diff --git a/pkgs/servers/pulseaudio/default.nix b/pkgs/servers/pulseaudio/default.nix
index ed4a8889c67d..73af65ef2561 100644
--- a/pkgs/servers/pulseaudio/default.nix
+++ b/pkgs/servers/pulseaudio/default.nix
@@ -5,9 +5,6 @@
 , sbc, bluez5, udev, openssl, fftwFloat
 , speexdsp, systemd, webrtc-audio-processing, gconf ? null
 
-# Database selection
-, tdb ? null, gdbm ? null
-
 , x11Support ? false
 
 , useSystemd ? true
diff --git a/pkgs/servers/rippled/data-api.nix b/pkgs/servers/rippled/data-api.nix
index 230e0aee2181..04d520b412c1 100644
--- a/pkgs/servers/rippled/data-api.nix
+++ b/pkgs/servers/rippled/data-api.nix
@@ -1,4 +1,4 @@
-{ lib, fetchgit, fetchurl, nodePackages }:
+{ lib, fetchgit, nodePackages }:
 
 with lib;
 
diff --git a/pkgs/servers/rippled/package.nix b/pkgs/servers/rippled/package.nix
index 6f5bb1d3a71f..87f4326c48c3 100644
--- a/pkgs/servers/rippled/package.nix
+++ b/pkgs/servers/rippled/package.nix
@@ -1,4 +1,4 @@
-{ self, fetchurl, fetchgit ? null, lib }:
+{ self, fetchurl ? null }:
 
 {
   by-spec."abbrev"."1" =
diff --git a/pkgs/servers/samba/4.x.nix b/pkgs/servers/samba/4.x.nix
index 0ff7f88911f2..eec80cb66bcc 100644
--- a/pkgs/servers/samba/4.x.nix
+++ b/pkgs/servers/samba/4.x.nix
@@ -1,9 +1,9 @@
 { lib, stdenv, fetchurl, python, pkgconfig, perl, libxslt, docbook_xsl
 , fetchpatch
-, docbook_xml_dtd_42, docbook_xml_dtd_45, readline, talloc
+, docbook_xml_dtd_42, readline, talloc
 , popt, iniparser, libbsd, libarchive, libiconv, gettext
 , krb5Full, zlib, openldap, cups, pam, avahi, acl, libaio, fam, libceph, glusterfs
-, gnutls, libgcrypt, libgpgerror
+, gnutls
 , ncurses, libunwind, libibverbs, librdmacm, systemd
 
 , enableInfiniband ? false
diff --git a/pkgs/servers/samba/master.nix b/pkgs/servers/samba/master.nix
index df1f9feb4de5..21038a0f2183 100644
--- a/pkgs/servers/samba/master.nix
+++ b/pkgs/servers/samba/master.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub
+{ fetchFromGitHub
 , samba4
 , nettle
 } :
diff --git a/pkgs/servers/search/elasticsearch/plugins.nix b/pkgs/servers/search/elasticsearch/plugins.nix
index ade2ea944534..b93d8c2203d7 100644
--- a/pkgs/servers/search/elasticsearch/plugins.nix
+++ b/pkgs/servers/search/elasticsearch/plugins.nix
@@ -1,4 +1,4 @@
-{ pkgs,  stdenv, fetchurl, fetchFromGitHub, unzip, elasticsearch }:
+{ pkgs,  stdenv, fetchurl, unzip, elasticsearch }:
 
 with pkgs.lib;
 
diff --git a/pkgs/servers/skydns/default.nix b/pkgs/servers/skydns/default.nix
index ccb174371e0c..7bfea23c78b5 100644
--- a/pkgs/servers/skydns/default.nix
+++ b/pkgs/servers/skydns/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "skydns-${version}";
diff --git a/pkgs/servers/sql/mariadb/default.nix b/pkgs/servers/sql/mariadb/default.nix
index 126a8cf0690e..121e42f7a978 100644
--- a/pkgs/servers/sql/mariadb/default.nix
+++ b/pkgs/servers/sql/mariadb/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, cmake, pkgconfig, ncurses, zlib, xz, lzo, lz4, bzip2, snappy
 , libiconv, openssl, pcre, boost, judy, bison, libxml2
-, libaio, libevent, groff, jemalloc, cracklib, systemd, numactl, perl
+, libaio, libevent, jemalloc, cracklib, systemd, numactl, perl
 , fixDarwinDylibNames, cctools, CoreServices
 , asio, buildEnv, check, scons
 }:
diff --git a/pkgs/servers/x11/xquartz/default.nix b/pkgs/servers/x11/xquartz/default.nix
index 9c133f9d5d99..3fc7aaea9c93 100644
--- a/pkgs/servers/x11/xquartz/default.nix
+++ b/pkgs/servers/x11/xquartz/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, lib, buildEnv, makeFontsConf, gnused, writeScript, xorg, bashInteractive, substituteAll, xterm, makeWrapper, ruby
-, openssl, quartz-wm, fontconfig, xlsfonts, xfontsel
+{ stdenv, lib, buildEnv, makeFontsConf, gnused, writeScript, xorg, bashInteractive, xterm, makeWrapper, ruby
+, quartz-wm, fontconfig, xlsfonts, xfontsel
 , ttf_bitstream_vera, freefont_ttf, liberation_ttf
 , shell ? "${bashInteractive}/bin/bash"
 }:
diff --git a/pkgs/shells/bash/4.4.nix b/pkgs/shells/bash/4.4.nix
index 72ce29bf3f2b..ab89dc28828b 100644
--- a/pkgs/shells/bash/4.4.nix
+++ b/pkgs/shells/bash/4.4.nix
@@ -5,7 +5,6 @@
 # patch for cygwin requires readline support
 , interactive ? stdenv.isCygwin, readline70 ? null
 , withDocs ? false, texinfo ? null
-, self
 }:
 
 with stdenv.lib;
diff --git a/pkgs/shells/elvish/default.nix b/pkgs/shells/elvish/default.nix
index 086fca480bb3..5a7128fa6463 100644
--- a/pkgs/shells/elvish/default.nix
+++ b/pkgs/shells/elvish/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "elvish-${version}";
diff --git a/pkgs/shells/fish/default.nix b/pkgs/shells/fish/default.nix
index d6c107e99532..2ef0480942c4 100644
--- a/pkgs/shells/fish/default.nix
+++ b/pkgs/shells/fish/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, coreutils, utillinux,
-  nettools, kbd, bc, which, gnused, gnugrep,
+  nettools, bc, which, gnused, gnugrep,
   groff, man-db, getent, libiconv, pcre2,
   gettext, ncurses, python3
 
diff --git a/pkgs/shells/oh/default.nix b/pkgs/shells/oh/default.nix
index c118cea11729..2e200a74f7b4 100644
--- a/pkgs/shells/oh/default.nix
+++ b/pkgs/shells/oh/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "oh-${version}";
diff --git a/pkgs/shells/oil/default.nix b/pkgs/shells/oil/default.nix
index ab475a63499c..8d3452b912bd 100644
--- a/pkgs/shells/oil/default.nix
+++ b/pkgs/shells/oil/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, coreutils }:
+{ stdenv, lib, fetchurl }:
 let
   version = "0.3.0";
 in
diff --git a/pkgs/shells/powershell/default.nix b/pkgs/shells/powershell/default.nix
index a053884bb885..93488d9e87f3 100644
--- a/pkgs/shells/powershell/default.nix
+++ b/pkgs/shells/powershell/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchgit, autoPatchelfHook, fetchzip, libunwind, libuuid, icu, curl,
+{ stdenv, autoPatchelfHook, fetchzip, libunwind, libuuid, icu, curl,
   makeWrapper, less, openssl, pam, lttng-ust }:
 
 let platformString = if stdenv.isDarwin then "osx"
diff --git a/pkgs/shells/zsh/antibody/default.nix b/pkgs/shells/zsh/antibody/default.nix
index 665f403047f3..98ca9ce8f999 100644
--- a/pkgs/shells/zsh/antibody/default.nix
+++ b/pkgs/shells/zsh/antibody/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "antibody-${version}";
diff --git a/pkgs/shells/zsh/zsh-powerlevel9k/default.nix b/pkgs/shells/zsh/zsh-powerlevel9k/default.nix
index 2babf35f2b68..30c45ea3c9bf 100644
--- a/pkgs/shells/zsh/zsh-powerlevel9k/default.nix
+++ b/pkgs/shells/zsh/zsh-powerlevel9k/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, zsh }:
+{ stdenv, fetchFromGitHub }:
 
 # To make use of this derivation, use
 # `programs.zsh.promptInit = "source ${pkgs.zsh-powerlevel9k}/share/zsh-powerlevel9k/powerlevel9k.zsh-theme";`
diff --git a/pkgs/shells/zsh/zsh-prezto/default.nix b/pkgs/shells/zsh/zsh-prezto/default.nix
index 7bef904081e0..8acdd8bb5161 100644
--- a/pkgs/shells/zsh/zsh-prezto/default.nix
+++ b/pkgs/shells/zsh/zsh-prezto/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchpatch, fetchgit, fetchFromGitHub }:
+{ stdenv, fetchgit }:
 
 stdenv.mkDerivation rec {
   name = "zsh-prezto-2017-12-03";
diff --git a/pkgs/tools/X11/bumblebee/default.nix b/pkgs/tools/X11/bumblebee/default.nix
index 7345528dad2b..0d764a4cbd10 100644
--- a/pkgs/tools/X11/bumblebee/default.nix
+++ b/pkgs/tools/X11/bumblebee/default.nix
@@ -18,15 +18,14 @@
 
 { stdenv, lib, fetchurl, fetchpatch, pkgconfig, help2man, makeWrapper
 , glib, libbsd
-, libX11, libXext, xorgserver, xkbcomp, kmod, xf86videonouveau
-, nvidia_x11, virtualgl, libglvnd, primusLib
+, libX11, xorgserver, kmod, xf86videonouveau
+, nvidia_x11, virtualgl, libglvnd
 , automake111x, autoconf
 # The below should only be non-null in a x86_64 system. On a i686
 # system the above nvidia_x11 and virtualgl will be the i686 packages.
 # TODO: Confusing. Perhaps use "SubArch" instead of i686?
 , nvidia_x11_i686 ? null
 , libglvnd_i686 ? null
-, primusLib_i686 ? null
 , useDisplayDevice ? false
 , extraNvidiaDeviceOptions ? ""
 , extraNouveauDeviceOptions ? ""
diff --git a/pkgs/tools/X11/go-sct/default.nix b/pkgs/tools/X11/go-sct/default.nix
index aeb4546ff4d3..189dc56975f3 100644
--- a/pkgs/tools/X11/go-sct/default.nix
+++ b/pkgs/tools/X11/go-sct/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, xorg, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, xorg, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "go-sct-${version}";
diff --git a/pkgs/tools/X11/primus/default.nix b/pkgs/tools/X11/primus/default.nix
index d130c9bac7cc..669cb4b4844a 100644
--- a/pkgs/tools/X11/primus/default.nix
+++ b/pkgs/tools/X11/primus/default.nix
@@ -6,7 +6,6 @@
 { stdenv
 , stdenv_i686
 , lib
-, bumblebee
 , primusLib
 , writeScriptBin
 , primusLib_i686 ? null
diff --git a/pkgs/tools/X11/setroot/default.nix b/pkgs/tools/X11/setroot/default.nix
index 669da86621fd..45cb1966a4ff 100644
--- a/pkgs/tools/X11/setroot/default.nix
+++ b/pkgs/tools/X11/setroot/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, libX11, imlib2
+{ stdenv, fetchFromGitHub, libX11, imlib2
 , enableXinerama ? true, libXinerama ? null
 }:
 
diff --git a/pkgs/tools/X11/vdpauinfo/default.nix b/pkgs/tools/X11/vdpauinfo/default.nix
index 21d7a50566db..153ff45d2a70 100644
--- a/pkgs/tools/X11/vdpauinfo/default.nix
+++ b/pkgs/tools/X11/vdpauinfo/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, xorg, libvdpau }:
+{ stdenv, fetchurl, pkgconfig, libvdpau }:
 
 stdenv.mkDerivation rec {
   name = "vdpauinfo-1.0";
diff --git a/pkgs/tools/X11/xbindkeys-config/default.nix b/pkgs/tools/X11/xbindkeys-config/default.nix
index e3d9ecd5953e..987293878d82 100644
--- a/pkgs/tools/X11/xbindkeys-config/default.nix
+++ b/pkgs/tools/X11/xbindkeys-config/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, libX11, gtk, pkgconfig, procps, makeWrapper, ... }:
+{ stdenv, fetchurl, gtk, pkgconfig, procps, makeWrapper, ... }:
 
 stdenv.mkDerivation rec {
   name = "xbindkeys-config-${version}";
diff --git a/pkgs/tools/X11/xdg-utils/default.nix b/pkgs/tools/X11/xdg-utils/default.nix
index 28839891aa55..d8ae32c6ee4c 100644
--- a/pkgs/tools/X11/xdg-utils/default.nix
+++ b/pkgs/tools/X11/xdg-utils/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, fetchFromGitHub
 , file, libxslt, docbook_xml_dtd_412, docbook_xsl, xmlto
-, w3m, which, gnugrep, gnused, coreutils, xset
+, w3m, gnugrep, gnused, coreutils, xset
 , mimiSupport ? false, gawk ? null }:
 
 assert mimiSupport -> gawk != null;
diff --git a/pkgs/tools/X11/xpra/default.nix b/pkgs/tools/X11/xpra/default.nix
index 8bff5a2e714a..e3f815621e7b 100644
--- a/pkgs/tools/X11/xpra/default.nix
+++ b/pkgs/tools/X11/xpra/default.nix
@@ -1,6 +1,6 @@
 { stdenv, lib, fetchurl, python2Packages, pkgconfig
 , xorg, gtk2, glib, pango, cairo, gdk_pixbuf, atk
-, makeWrapper, xkbcomp, xorgserver, getopt, xauth, utillinux, which, fontsConf
+, makeWrapper, xorgserver, getopt, xauth, utillinux, which
 , ffmpeg, x264, libvpx, libwebp
 , libfakeXinerama
 , gst_all_1, pulseaudio, gobjectIntrospection
diff --git a/pkgs/tools/X11/xpra/gtk3.nix b/pkgs/tools/X11/xpra/gtk3.nix
index a0c2ee8f995f..16693b08e110 100644
--- a/pkgs/tools/X11/xpra/gtk3.nix
+++ b/pkgs/tools/X11/xpra/gtk3.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchurl, buildPythonApplication
 , python, cython, pkgconfig
 , xorg, gtk3, glib, pango, cairo, gdk_pixbuf, atk, pygobject3, pycairo, gobjectIntrospection
-, makeWrapper, xkbcomp, xorgserver, getopt, xauth, utillinux, which, fontsConf
+, makeWrapper, xorgserver, getopt, xauth, utillinux, which, fontsConf
 , ffmpeg, x264, libvpx, libwebp
 , libfakeXinerama, pam }:
 
diff --git a/pkgs/tools/admin/ansible/default.nix b/pkgs/tools/admin/ansible/default.nix
index b942ae6a006c..d18fe4eafd34 100644
--- a/pkgs/tools/admin/ansible/default.nix
+++ b/pkgs/tools/admin/ansible/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub, python2
+{ stdenv, fetchurl, python2
 , windowsSupport ? false
 }:
 
diff --git a/pkgs/tools/admin/dehydrated/default.nix b/pkgs/tools/admin/dehydrated/default.nix
index 38b70d1b5d07..c9c879becaa0 100644
--- a/pkgs/tools/admin/dehydrated/default.nix
+++ b/pkgs/tools/admin/dehydrated/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, bash, coreutils, curl, diffutils, gawk, gnugrep, gnused, openssl, makeWrapper, fetchFromGitHub }:
+{ stdenv, coreutils, curl, diffutils, gawk, gnugrep, gnused, openssl, makeWrapper, fetchFromGitHub }:
 let
   pkgName = "dehydrated";
   version = "0.6.2";
diff --git a/pkgs/tools/admin/gtk-vnc/default.nix b/pkgs/tools/admin/gtk-vnc/default.nix
index 59a5ec8d4dad..cd6cf90a5aa5 100644
--- a/pkgs/tools/admin/gtk-vnc/default.nix
+++ b/pkgs/tools/admin/gtk-vnc/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchurl, gobjectIntrospection
-, gnutls, cairo, libtool, glib, pkgconfig, libtasn1
+, gnutls, cairo, libtool, glib, pkgconfig
 , libffi, cyrus_sasl, intltool, perl, perlPackages, libpulseaudio
-, kbproto, libX11, libXext, xextproto, libgcrypt, gtk3, vala_0_32
+, libgcrypt, gtk3, vala_0_32
 , libogg, libgpgerror, pythonPackages }:
 
 let
diff --git a/pkgs/tools/admin/intecture/agent.nix b/pkgs/tools/admin/intecture/agent.nix
index 2b663cd3bcee..780eb4e9aa52 100644
--- a/pkgs/tools/admin/intecture/agent.nix
+++ b/pkgs/tools/admin/intecture/agent.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, rustPlatform
+{ lib, fetchFromGitHub, rustPlatform
 , openssl, zeromq, czmq, pkgconfig, cmake, zlib }:
 
 with rustPlatform;
diff --git a/pkgs/tools/admin/intecture/auth.nix b/pkgs/tools/admin/intecture/auth.nix
index 759230c6a293..2a02873a8b5c 100644
--- a/pkgs/tools/admin/intecture/auth.nix
+++ b/pkgs/tools/admin/intecture/auth.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, rustPlatform
+{ lib, fetchFromGitHub, rustPlatform
 , openssl, zeromq, czmq, pkgconfig, cmake, zlib }:
 
 with rustPlatform;
diff --git a/pkgs/tools/admin/intecture/cli.nix b/pkgs/tools/admin/intecture/cli.nix
index a4ac74e9f2da..fef0e50cd5b1 100644
--- a/pkgs/tools/admin/intecture/cli.nix
+++ b/pkgs/tools/admin/intecture/cli.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, rustPlatform
+{ lib, fetchFromGitHub, rustPlatform
 , openssl, zeromq, czmq, pkgconfig, cmake, zlib }:
 
 with rustPlatform;
diff --git a/pkgs/tools/admin/lxd/default.nix b/pkgs/tools/admin/lxd/default.nix
index dfe4c099bebb..2fbfff287cb9 100644
--- a/pkgs/tools/admin/lxd/default.nix
+++ b/pkgs/tools/admin/lxd/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, pkgconfig, lxc, buildGoPackage, fetchurl
+{ stdenv, pkgconfig, lxc, buildGoPackage, fetchurl
 , makeWrapper, acl, rsync, gnutar, xz, btrfs-progs, gzip, dnsmasq
 , squashfsTools, iproute, iptables, ebtables
 }:
diff --git a/pkgs/tools/admin/simp_le/default.nix b/pkgs/tools/admin/simp_le/default.nix
index 47bf848578d9..ca0e16c1185a 100644
--- a/pkgs/tools/admin/simp_le/default.nix
+++ b/pkgs/tools/admin/simp_le/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, pythonPackages, bash }:
+{ stdenv, pythonPackages, bash }:
  
 pythonPackages.buildPythonApplication rec {
   pname = "simp_le-client";
diff --git a/pkgs/tools/admin/ssl-cert-check/default.nix b/pkgs/tools/admin/ssl-cert-check/default.nix
index 8d30307af2d3..f8e893078157 100644
--- a/pkgs/tools/admin/ssl-cert-check/default.nix
+++ b/pkgs/tools/admin/ssl-cert-check/default.nix
@@ -1,5 +1,4 @@
 { stdenv
-, lib
 , fetchFromGitHub
 , makeWrapper
 , openssl
diff --git a/pkgs/tools/archivers/innoextract/default.nix b/pkgs/tools/archivers/innoextract/default.nix
index 14b128d15c7a..dc9796cc9e3a 100644
--- a/pkgs/tools/archivers/innoextract/default.nix
+++ b/pkgs/tools/archivers/innoextract/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, cmake, doxygen, makeWrapper, python
+{ stdenv, fetchurl, cmake, makeWrapper, python
 , boost, lzma
 , withGog ? false, unar ? null }:
 
diff --git a/pkgs/tools/archivers/rpmextract/default.nix b/pkgs/tools/archivers/rpmextract/default.nix
index c9ce6ac4d10b..8d4d5fd8dddd 100644
--- a/pkgs/tools/archivers/rpmextract/default.nix
+++ b/pkgs/tools/archivers/rpmextract/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, rpm, cpio, substituteAll }:
+{ stdenv, rpm, cpio, substituteAll }:
 
 stdenv.mkDerivation rec {
   name = "rpmextract";
diff --git a/pkgs/tools/archivers/unp/default.nix b/pkgs/tools/archivers/unp/default.nix
index 7583663ebf0a..79c8e2f20ecc 100644
--- a/pkgs/tools/archivers/unp/default.nix
+++ b/pkgs/tools/archivers/unp/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, pkgs, lib, fetchurl, makeWrapper, perl, unrar, unzip, gzip, file, extraBackends ? [] }:
+{ stdenv, lib, fetchurl, makeWrapper, perl, unrar, unzip, gzip, file, extraBackends ? [] }:
 
 stdenv.mkDerivation rec {
   name = "unp-${version}";
diff --git a/pkgs/tools/archivers/zpaq/zpaqd.nix b/pkgs/tools/archivers/zpaq/zpaqd.nix
index 3004c7e2132c..0d60e7962460 100644
--- a/pkgs/tools/archivers/zpaq/zpaqd.nix
+++ b/pkgs/tools/archivers/zpaq/zpaqd.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, unzip
-, buildPlatform, hostPlatform
+, hostPlatform
 }:
 
 let
diff --git a/pkgs/tools/backup/bareos/default.nix b/pkgs/tools/backup/bareos/default.nix
index 691568673df3..e93b02e062e2 100644
--- a/pkgs/tools/backup/bareos/default.nix
+++ b/pkgs/tools/backup/bareos/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, pkgconfig, nettools, gettext, libtool, flex
+{ stdenv, fetchFromGitHub, pkgconfig, nettools, gettext, flex
 , readline ? null, openssl ? null, python2 ? null, ncurses ? null, rocksdb
 , sqlite ? null, postgresql ? null, mysql ? null, zlib ? null, lzo ? null
 , jansson ? null, acl ? null, glusterfs ? null, libceph ? null, libcap ? null
diff --git a/pkgs/tools/backup/ddar/default.nix b/pkgs/tools/backup/ddar/default.nix
index eac589813f47..ce65ef4eb80b 100644
--- a/pkgs/tools/backup/ddar/default.nix
+++ b/pkgs/tools/backup/ddar/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonApplication, fetchFromGitHub, python, protobuf, roundup }:
+{ lib, buildPythonApplication, fetchFromGitHub, protobuf, roundup }:
 
 buildPythonApplication rec {
   pname = "ddar";
diff --git a/pkgs/tools/backup/partimage/default.nix b/pkgs/tools/backup/partimage/default.nix
index c902802abce2..8781c2d2cada 100644
--- a/pkgs/tools/backup/partimage/default.nix
+++ b/pkgs/tools/backup/partimage/default.nix
@@ -1,5 +1,4 @@
 {stdenv, fetchurl, fetchpatch, bzip2, zlib, newt, openssl, pkgconfig, slang
-, automake, autoconf, libtool, gettext
 }:
 stdenv.mkDerivation {
   name = "partimage-0.6.9";
diff --git a/pkgs/tools/backup/rsnapshot/default.nix b/pkgs/tools/backup/rsnapshot/default.nix
index 77f5951d39e2..6abd7002f8d7 100644
--- a/pkgs/tools/backup/rsnapshot/default.nix
+++ b/pkgs/tools/backup/rsnapshot/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, writeText, perl, openssh, rsync, logger }:
+{ fetchurl, stdenv, perl, openssh, rsync, logger }:
 
 stdenv.mkDerivation rec {
   name = "rsnapshot-1.4.2";
diff --git a/pkgs/tools/backup/ugarit-manifest-maker/default.nix b/pkgs/tools/backup/ugarit-manifest-maker/default.nix
index 00651806a10a..8f93474f8f16 100644
--- a/pkgs/tools/backup/ugarit-manifest-maker/default.nix
+++ b/pkgs/tools/backup/ugarit-manifest-maker/default.nix
@@ -1,6 +1,6 @@
 { pkgs, stdenv, eggDerivation, fetchegg }:
 let
-  eggs = import ./eggs.nix { inherit pkgs stdenv eggDerivation fetchegg; };
+  eggs = import ./eggs.nix { inherit eggDerivation fetchegg; };
 in with pkgs; eggDerivation rec {
   pname = "ugarit-manifest-maker";
   version = "0.1";
diff --git a/pkgs/tools/backup/ugarit-manifest-maker/eggs.nix b/pkgs/tools/backup/ugarit-manifest-maker/eggs.nix
index 0af5dd5bfff1..889d698188e2 100644
--- a/pkgs/tools/backup/ugarit-manifest-maker/eggs.nix
+++ b/pkgs/tools/backup/ugarit-manifest-maker/eggs.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv, eggDerivation, fetchegg }:
+{ eggDerivation, fetchegg }:
 rec {
   blob-utils = eggDerivation {
     name = "blob-utils-1.0.3";
diff --git a/pkgs/tools/backup/ugarit/default.nix b/pkgs/tools/backup/ugarit/default.nix
index 56da9a810208..e8f0ea22df10 100644
--- a/pkgs/tools/backup/ugarit/default.nix
+++ b/pkgs/tools/backup/ugarit/default.nix
@@ -1,6 +1,6 @@
 { pkgs, stdenv, eggDerivation, fetchegg }:
 let
-  eggs = import ./eggs.nix { inherit pkgs stdenv eggDerivation fetchegg; };
+  eggs = import ./eggs.nix { inherit eggDerivation fetchegg; };
 in with pkgs; eggDerivation rec {
   pname = "ugarit";
   version = "2.0";
diff --git a/pkgs/tools/backup/ugarit/eggs.nix b/pkgs/tools/backup/ugarit/eggs.nix
index 9329618887fb..fe958cb55cc6 100644
--- a/pkgs/tools/backup/ugarit/eggs.nix
+++ b/pkgs/tools/backup/ugarit/eggs.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv, eggDerivation, fetchegg }:
+{ eggDerivation, fetchegg }:
 rec {
   aes = eggDerivation {
     name = "aes-1.5";
diff --git a/pkgs/tools/backup/znapzend/default.nix b/pkgs/tools/backup/znapzend/default.nix
index f78c300afd0a..bc57215c0c4b 100644
--- a/pkgs/tools/backup/znapzend/default.nix
+++ b/pkgs/tools/backup/znapzend/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchurl, zfs, mbuffer, perl, perlPackages, wget, autoconf, automake }:
+{ stdenv, fetchFromGitHub, fetchurl, perl, perlPackages, wget, autoconf, automake }:
 
 let
   # when upgrade znapzend, check versions of Perl libs here: https://github.com/oetiker/znapzend/blob/master/PERL_MODULES
diff --git a/pkgs/tools/bluetooth/blueman/default.nix b/pkgs/tools/bluetooth/blueman/default.nix
index 394f3fe5b980..da562fde1603 100644
--- a/pkgs/tools/bluetooth/blueman/default.nix
+++ b/pkgs/tools/bluetooth/blueman/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, intltool, pkgconfig, pythonPackages, bluez, polkit, gtk3
+{ stdenv, lib, fetchurl, intltool, pkgconfig, pythonPackages, bluez, gtk3
 , obex_data_server, xdg_utils, libnotify, dnsmasq, dhcp
 , hicolor-icon-theme, librsvg, wrapGAppsHook, gobjectIntrospection
 , withPulseAudio ? true, libpulseaudio }:
diff --git a/pkgs/tools/bootloaders/refind/default.nix b/pkgs/tools/bootloaders/refind/default.nix
index 80add316094c..674bb5b552b9 100644
--- a/pkgs/tools/bootloaders/refind/default.nix
+++ b/pkgs/tools/bootloaders/refind/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, gnu-efi }:
+{ stdenv, fetchurl, gnu-efi }:
 
 let
   archids = {
diff --git a/pkgs/tools/cd-dvd/brasero/default.nix b/pkgs/tools/cd-dvd/brasero/default.nix
index 8223ba2be4bb..9587416a96af 100644
--- a/pkgs/tools/cd-dvd/brasero/default.nix
+++ b/pkgs/tools/cd-dvd/brasero/default.nix
@@ -1,5 +1,5 @@
 { stdenv, lib, fetchurl, pkgconfig, gtk3, itstool, gst_all_1, libxml2, libnotify
-, libcanberra-gtk3, intltool, makeWrapper, dvdauthor, libburn, libisofs
+, libcanberra-gtk3, intltool, dvdauthor, libburn, libisofs
 , vcdimager, wrapGAppsHook, hicolor-icon-theme }:
 
 # libdvdcss is "too old" (in fast "too new"), see https://bugs.launchpad.net/ubuntu/+source/brasero/+bug/611590
diff --git a/pkgs/tools/compression/bzip2/default.nix b/pkgs/tools/compression/bzip2/default.nix
index 3a06a39dcad7..0d2e63c7d59d 100644
--- a/pkgs/tools/compression/bzip2/default.nix
+++ b/pkgs/tools/compression/bzip2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch
+{ stdenv, fetchurl
 , linkStatic ? (stdenv.system == "i686-cygwin")
 }:
 
diff --git a/pkgs/tools/compression/gzip/default.nix b/pkgs/tools/compression/gzip/default.nix
index c39216f1e0cc..09065ede6827 100644
--- a/pkgs/tools/compression/gzip/default.nix
+++ b/pkgs/tools/compression/gzip/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, hostPlatform, fetchurl, xz }:
+{ stdenv, fetchurl, xz }:
 
 stdenv.mkDerivation rec {
   name = "gzip-${version}";
diff --git a/pkgs/tools/compression/lzbench/default.nix b/pkgs/tools/compression/lzbench/default.nix
index a38e0a67b282..df7700d41cb8 100644
--- a/pkgs/tools/compression/lzbench/default.nix
+++ b/pkgs/tools/compression/lzbench/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, glibc }:
+{ stdenv, fetchFromGitHub }:
 
 stdenv.mkDerivation rec {
   name = "lzbench-20170208";
diff --git a/pkgs/tools/compression/upx/default.nix b/pkgs/tools/compression/upx/default.nix
index 213d98a1ec12..ea363ae8cc2a 100644
--- a/pkgs/tools/compression/upx/default.nix
+++ b/pkgs/tools/compression/upx/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub, ucl, zlib, perl }:
+{ stdenv, fetchurl, ucl, zlib, perl }:
 
 stdenv.mkDerivation rec {
   name = "upx-${version}";
diff --git a/pkgs/tools/filesystems/bcachefs-tools/default.nix b/pkgs/tools/filesystems/bcachefs-tools/default.nix
index c2e13b75daa9..1fafe7412d87 100644
--- a/pkgs/tools/filesystems/bcachefs-tools/default.nix
+++ b/pkgs/tools/filesystems/bcachefs-tools/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, pkgs, fetchgit, pkgconfig, attr, libuuid, libscrypt, libsodium
+{ stdenv, fetchgit, pkgconfig, attr, libuuid, libscrypt, libsodium
 , keyutils, liburcu, zlib, libaio, zstd }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/tools/filesystems/ceph/generic.nix b/pkgs/tools/filesystems/ceph/generic.nix
index 20eb363b2278..14fedd6610e1 100644
--- a/pkgs/tools/filesystems/ceph/generic.nix
+++ b/pkgs/tools/filesystems/ceph/generic.nix
@@ -9,7 +9,7 @@
 
 # Optional Dependencies
 , yasm ? null, fcgi ? null, expat ? null
-, curl ? null, fuse ? null, libibverbs ? null, librdmacm ? null
+, curl ? null, fuse ? null
 , libedit ? null, libatomic_ops ? null, kinetic-cpp-client ? null
 , libs3 ? null
 
@@ -25,7 +25,7 @@
 , zfs ? null
 
 # Version specific arguments
-, version, src, patches ? [], buildInputs ? []
+, version, src ? [], buildInputs ? []
 , ...
 }:
 
@@ -92,7 +92,7 @@ let
     ps.prettytable
     ps.webob
     ps.cherrypy
-	]);
+  ]);
 
 in
 stdenv.mkDerivation {
@@ -101,7 +101,7 @@ stdenv.mkDerivation {
   inherit src;
 
   patches = [
- #	 ./ceph-patch-cmake-path.patch
+ #   ./ceph-patch-cmake-path.patch
     ./0001-kv-RocksDBStore-API-break-additional.patch
   ] ++ optionals stdenv.isLinux [
     ./0002-fix-absolute-include-path.patch
diff --git a/pkgs/tools/filesystems/fatresize/default.nix b/pkgs/tools/filesystems/fatresize/default.nix
index f929f354766c..9af14b051261 100644
--- a/pkgs/tools/filesystems/fatresize/default.nix
+++ b/pkgs/tools/filesystems/fatresize/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, parted, substituteAll, utillinux }:
+{ stdenv, fetchurl, parted, utillinux }:
 
 stdenv.mkDerivation rec {
   
diff --git a/pkgs/tools/filesystems/glusterfs/default.nix b/pkgs/tools/filesystems/glusterfs/default.nix
index 494fd7036e29..beb046cdbdb7 100644
--- a/pkgs/tools/filesystems/glusterfs/default.nix
+++ b/pkgs/tools/filesystems/glusterfs/default.nix
@@ -1,6 +1,6 @@
 {stdenv, fetchurl, fuse, bison, flex_2_5_35, openssl, python2, ncurses, readline,
  autoconf, automake, libtool, pkgconfig, zlib, libaio, libxml2, acl, sqlite,
- liburcu, attr, makeWrapper, coreutils, gnused, gnugrep, which, python2Packages,
+ liburcu, attr, makeWrapper, coreutils, gnused, gnugrep, which,
  openssh, gawk, findutils, utillinux, lvm2, btrfs-progs, e2fsprogs, xfsprogs, systemd,
  rsync, glibc
 }:
diff --git a/pkgs/tools/filesystems/go-mtpfs/default.nix b/pkgs/tools/filesystems/go-mtpfs/default.nix
index 028aef6024b1..0438b9c38e4b 100644
--- a/pkgs/tools/filesystems/go-mtpfs/default.nix
+++ b/pkgs/tools/filesystems/go-mtpfs/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, pkgconfig, libusb1, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, pkgconfig, libusb1, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "go-mtpfs-${version}";
diff --git a/pkgs/tools/filesystems/grive2/default.nix b/pkgs/tools/filesystems/grive2/default.nix
index f4bb5592abdb..4f7c2248a8ed 100644
--- a/pkgs/tools/filesystems/grive2/default.nix
+++ b/pkgs/tools/filesystems/grive2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, pkgconfig, fetchurl, yajl, cmake, libgcrypt, curl, expat, boost, libiberty }:
+{ stdenv, fetchFromGitHub, pkgconfig, yajl, cmake, libgcrypt, curl, expat, boost, libiberty }:
 
 stdenv.mkDerivation rec {
   version = "0.5.0";
diff --git a/pkgs/tools/filesystems/irods/default.nix b/pkgs/tools/filesystems/irods/default.nix
index c2066f95ef5a..24a88349bf43 100644
--- a/pkgs/tools/filesystems/irods/default.nix
+++ b/pkgs/tools/filesystems/irods/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, python, bzip2, zlib, autoconf, automake, cmake, gnumake, help2man , texinfo, libtool , cppzmq , libarchive, avro-cpp_llvm, boost, jansson, zeromq, openssl , pam, libiodbc, kerberos, gcc, libcxx, which }:
+{ stdenv, fetchurl, bzip2, zlib, autoconf, automake, cmake, gnumake, help2man , texinfo, libtool , cppzmq , libarchive, avro-cpp_llvm, boost, jansson, zeromq, openssl , pam, libiodbc, kerberos, gcc, libcxx, which }:
 
 with stdenv;
 
diff --git a/pkgs/tools/filesystems/nixpart/0.4/default.nix b/pkgs/tools/filesystems/nixpart/0.4/default.nix
index 217056117ea7..758e130e4adf 100644
--- a/pkgs/tools/filesystems/nixpart/0.4/default.nix
+++ b/pkgs/tools/filesystems/nixpart/0.4/default.nix
@@ -1,8 +1,6 @@
 { stdenv, fetchurl, python, buildPythonApplication
 # Propagated to blivet
 , useNixUdev ? true
-# No longer needed, but kept for backwards-compatibility with older NixOps.
-, udevSoMajor ? null
 # Propagated dependencies
 , pkgs, urlgrabber
 }:
diff --git a/pkgs/tools/filesystems/squashfuse/default.nix b/pkgs/tools/filesystems/squashfuse/default.nix
index 341b025b0791..b3d8d70f0e29 100644
--- a/pkgs/tools/filesystems/squashfuse/default.nix
+++ b/pkgs/tools/filesystems/squashfuse/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, fetchFromGitHub, fetchpatch, automake, autoreconfHook, libtool, fuse,
-  pkgconfig, pcre, lz4, xz, zlib, lzo, zstd }:
+{ stdenv, fetchFromGitHub, autoreconfHook, libtool, fuse,
+  pkgconfig, lz4, xz, zlib, lzo, zstd }:
 
 with stdenv.lib;
 
diff --git a/pkgs/tools/filesystems/xtreemfs/default.nix b/pkgs/tools/filesystems/xtreemfs/default.nix
index 2a85adb60b56..4c0c2343dd2a 100644
--- a/pkgs/tools/filesystems/xtreemfs/default.nix
+++ b/pkgs/tools/filesystems/xtreemfs/default.nix
@@ -1,5 +1,5 @@
 { stdenv, boost, fuse, openssl, cmake, attr, jdk, ant, which, file, python
-, fetchurl, lib, valgrind, makeWrapper, fetchFromGitHub }:
+, lib, valgrind, makeWrapper, fetchFromGitHub }:
 
 stdenv.mkDerivation rec {
   src = fetchFromGitHub {
diff --git a/pkgs/tools/filesystems/zkfuse/default.nix b/pkgs/tools/filesystems/zkfuse/default.nix
index 9dfb2deeaee3..66e6690bc6a7 100644
--- a/pkgs/tools/filesystems/zkfuse/default.nix
+++ b/pkgs/tools/filesystems/zkfuse/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, zookeeper, zookeeper_mt, fuse, pkgconfig, autoreconfHook, log4cxx, boost, tree }:
+{ stdenv, lib, zookeeper, zookeeper_mt, fuse, autoreconfHook, log4cxx, boost }:
 
 stdenv.mkDerivation rec {
   name = "zkfuse-${version}";
diff --git a/pkgs/tools/graphics/argyllcms/default.nix b/pkgs/tools/graphics/argyllcms/default.nix
index 7a06d9f346b8..a3b259703517 100644
--- a/pkgs/tools/graphics/argyllcms/default.nix
+++ b/pkgs/tools/graphics/argyllcms/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchzip, jam, unzip, libX11, libXxf86vm, libXrandr, libXinerama
 , libXrender, libXext, libtiff, libjpeg, libpng, libXScrnSaver, writeText
-, libXdmcp, libXau, lib, openssl, zlib }:
+, libXdmcp, libXau, lib, openssl }:
 let
   version = "2.0.0";
  in
diff --git a/pkgs/tools/graphics/cuneiform/default.nix b/pkgs/tools/graphics/cuneiform/default.nix
index 0a48e947a48e..cc899ab104f9 100644
--- a/pkgs/tools/graphics/cuneiform/default.nix
+++ b/pkgs/tools/graphics/cuneiform/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, cmake, patchelf, imagemagick }:
+{ stdenv, fetchurl, cmake, imagemagick }:
 
 stdenv.mkDerivation rec {
   name = "cuneiform-${version}";
diff --git a/pkgs/tools/graphics/gmic/default.nix b/pkgs/tools/graphics/gmic/default.nix
index 6c62e0528386..c267695dd784 100644
--- a/pkgs/tools/graphics/gmic/default.nix
+++ b/pkgs/tools/graphics/gmic/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub, cmake, ninja, pkgconfig
+{ stdenv, fetchurl, cmake, ninja, pkgconfig
 , opencv, openexr, graphicsmagick, fftw, zlib, libjpeg, libtiff, libpng
 , withGimpPlugin ? true, gimp ? null}:
 
diff --git a/pkgs/tools/graphics/gnuplot/default.nix b/pkgs/tools/graphics/gnuplot/default.nix
index 0a4ebf495b24..d50adaa387fa 100644
--- a/pkgs/tools/graphics/gnuplot/default.nix
+++ b/pkgs/tools/graphics/gnuplot/default.nix
@@ -2,7 +2,6 @@
 , cairo, gd, libcerf, pango, readline, zlib
 , withTeXLive ? false, texlive
 , withLua ? false, lua
-, emacs ? null
 , libX11 ? null
 , libXt ? null
 , libXpm ? null
diff --git a/pkgs/tools/graphics/jbig2enc/default.nix b/pkgs/tools/graphics/jbig2enc/default.nix
index 0bb0bb00efa5..393c18d38529 100644
--- a/pkgs/tools/graphics/jbig2enc/default.nix
+++ b/pkgs/tools/graphics/jbig2enc/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, leptonica, zlib, libwebp, giflib, libjpeg, libpng, libtiff }:
+{ stdenv, fetchurl, leptonica, zlib, libwebp, giflib, libjpeg, libpng, libtiff }:
 
 stdenv.mkDerivation {
   name = "jbig2enc-0.28";
diff --git a/pkgs/tools/graphics/pywal/default.nix b/pkgs/tools/graphics/pywal/default.nix
index 95f7c547b559..a83bc845eb9e 100644
--- a/pkgs/tools/graphics/pywal/default.nix
+++ b/pkgs/tools/graphics/pywal/default.nix
@@ -1,4 +1,4 @@
-{ lib, python3Packages, fetchFromGitHub, imagemagick, feh }:
+{ lib, python3Packages, imagemagick, feh }:
 
 python3Packages.buildPythonApplication rec {
   pname = "pywal";
diff --git a/pkgs/tools/graphics/vips/default.nix b/pkgs/tools/graphics/vips/default.nix
index da63cb58a55f..18699f412847 100644
--- a/pkgs/tools/graphics/vips/default.nix
+++ b/pkgs/tools/graphics/vips/default.nix
@@ -1,6 +1,6 @@
-{ stdenv, fetchurl, pkgconfig, glib, libxml2, flex, bison, vips, expat,
+{ stdenv, fetchurl, pkgconfig, glib, libxml2, expat,
   fftw, orc, lcms, imagemagick, openexr, libtiff, libjpeg, libgsf, libexif,
-  python27, libpng, matio ? null, cfitsio ? null, libwebp ? null
+  python27, libpng ? null
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/tools/inputmethods/fcitx-engines/fcitx-mozc/default.nix b/pkgs/tools/inputmethods/fcitx-engines/fcitx-mozc/default.nix
index 170ac4c6a26f..d74c7608bc90 100644
--- a/pkgs/tools/inputmethods/fcitx-engines/fcitx-mozc/default.nix
+++ b/pkgs/tools/inputmethods/fcitx-engines/fcitx-mozc/default.nix
@@ -1,5 +1,5 @@
 { clangStdenv, fetchFromGitHub, fetchurl, fetchpatch, gyp, which, ninja,
-  python, pkgconfig, protobuf, gtk2, zinnia, qt5, libxcb, tegaki-zinnia-japanese,
+  python, pkgconfig, protobuf, gtk2, zinnia, qt5, libxcb,
   fcitx, gettext }:
 let
   japanese_usage_dictionary = fetchFromGitHub {
diff --git a/pkgs/tools/inputmethods/fcitx/fcitx-qt5.nix b/pkgs/tools/inputmethods/fcitx/fcitx-qt5.nix
index 50ab7d85c5ac..166fd16811ab 100644
--- a/pkgs/tools/inputmethods/fcitx/fcitx-qt5.nix
+++ b/pkgs/tools/inputmethods/fcitx/fcitx-qt5.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, cmake, fcitx, pkgconfig, qtbase, extra-cmake-modules
+{ stdenv, fetchurl, cmake, fcitx, pkgconfig, qtbase, extra-cmake-modules
 , fetchpatch
 }:
 
diff --git a/pkgs/tools/inputmethods/fcitx/unwrapped.nix b/pkgs/tools/inputmethods/fcitx/unwrapped.nix
index c7d0eecb763c..ab8a7bdb34de 100644
--- a/pkgs/tools/inputmethods/fcitx/unwrapped.nix
+++ b/pkgs/tools/inputmethods/fcitx/unwrapped.nix
@@ -2,7 +2,7 @@
 , libxml2, enchant, isocodes, icu, libpthreadstubs
 , pango, cairo, libxkbfile, libXau, libXdmcp, libxkbcommon
 , dbus, gtk2, gtk3, qt4, extra-cmake-modules
-, xkeyboard_config, pcre, libuuid, curl, cacert
+, xkeyboard_config, pcre, libuuid
 , withPinyin ? true
 , fetchFromGitHub
 }:
diff --git a/pkgs/tools/inputmethods/fcitx/wrapper.nix b/pkgs/tools/inputmethods/fcitx/wrapper.nix
index 1dfe6b245061..28a08e39b225 100644
--- a/pkgs/tools/inputmethods/fcitx/wrapper.nix
+++ b/pkgs/tools/inputmethods/fcitx/wrapper.nix
@@ -1,4 +1,4 @@
-{ stdenv, symlinkJoin, fcitx, fcitx-configtool, makeWrapper, plugins, libsForQt5 }:
+{ symlinkJoin, fcitx, fcitx-configtool, makeWrapper, plugins, libsForQt5 }:
 
 symlinkJoin {
   name = "fcitx-with-plugins-${fcitx.version}";
diff --git a/pkgs/tools/inputmethods/ibus-engines/ibus-hangul/default.nix b/pkgs/tools/inputmethods/ibus-engines/ibus-hangul/default.nix
index f70c7d02e9f0..cb2076cd21c7 100644
--- a/pkgs/tools/inputmethods/ibus-engines/ibus-hangul/default.nix
+++ b/pkgs/tools/inputmethods/ibus-engines/ibus-hangul/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, intltool, pkgconfig
-, gtk3, ibus, libhangul, librsvg, python3
+, gtk3, ibus, libhangul, python3
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/tools/inputmethods/ibus-engines/ibus-mozc/default.nix b/pkgs/tools/inputmethods/ibus-engines/ibus-mozc/default.nix
index fd924cdd2a2b..01b092ef2a61 100644
--- a/pkgs/tools/inputmethods/ibus-engines/ibus-mozc/default.nix
+++ b/pkgs/tools/inputmethods/ibus-engines/ibus-mozc/default.nix
@@ -1,5 +1,5 @@
 { clangStdenv, fetchFromGitHub, which, ninja, python, gyp, pkgconfig, protobuf
-, ibus, gtk2, zinnia, qt5, libxcb, tegaki-zinnia-japanese }:
+, ibus, gtk2, zinnia, qt5, libxcb }:
 
 let
   japanese_usage_dictionary = fetchFromGitHub {
diff --git a/pkgs/tools/inputmethods/ibus/default.nix b/pkgs/tools/inputmethods/ibus/default.nix
index d3507b57cbd0..540779477e35 100644
--- a/pkgs/tools/inputmethods/ibus/default.nix
+++ b/pkgs/tools/inputmethods/ibus/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, fetchFromGitHub, autoreconfHook, gconf, intltool, makeWrapper, pkgconfig
-, vala, wrapGAppsHook, atk, dbus, dconf ? null, glib, gdk_pixbuf, gobjectIntrospection, gtk2
+, vala, wrapGAppsHook, dbus, dconf ? null, glib, gdk_pixbuf, gobjectIntrospection, gtk2
 , gtk3, gtk-doc, isocodes, python3, json-glib, libnotify ? null, enablePythonLibrary ? true
 , enableUI ? true, withWayland ? false, libxkbcommon ? null, wayland ? null }:
 
diff --git a/pkgs/tools/inputmethods/interception-tools/default.nix b/pkgs/tools/inputmethods/interception-tools/default.nix
index 33c66fb7ff20..a6aed47d964c 100644
--- a/pkgs/tools/inputmethods/interception-tools/default.nix
+++ b/pkgs/tools/inputmethods/interception-tools/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub, pkgconfig, cmake, libyamlcpp,
+{ stdenv, fetchurl, pkgconfig, cmake, libyamlcpp,
   libevdev, udev }:
 
 let
diff --git a/pkgs/tools/misc/apt-offline/default.nix b/pkgs/tools/misc/apt-offline/default.nix
index ff146e609232..1044c0acc0a8 100644
--- a/pkgs/tools/misc/apt-offline/default.nix
+++ b/pkgs/tools/misc/apt-offline/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, bash, pythonPackages }:
+{ stdenv, fetchurl, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   version = "1.3";
diff --git a/pkgs/tools/misc/azure-vhd-utils/default.nix b/pkgs/tools/misc/azure-vhd-utils/default.nix
index fcdd9a81d720..5ead0e1020cb 100644
--- a/pkgs/tools/misc/azure-vhd-utils/default.nix
+++ b/pkgs/tools/misc/azure-vhd-utils/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ stdenv, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "azure-vhd-utils-${version}";
diff --git a/pkgs/tools/misc/bibutils/default.nix b/pkgs/tools/misc/bibutils/default.nix
index 41a50eecd84b..d0434ebe28b4 100644
--- a/pkgs/tools/misc/bibutils/default.nix
+++ b/pkgs/tools/misc/bibutils/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, perl }:
+{ stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
   name = "bibutils-${version}";
diff --git a/pkgs/tools/misc/byobu/default.nix b/pkgs/tools/misc/byobu/default.nix
index c5ebe7cf32ee..026c626ff77e 100644
--- a/pkgs/tools/misc/byobu/default.nix
+++ b/pkgs/tools/misc/byobu/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, ncurses, python, perl, textual-window-manager }:
+{ stdenv, fetchurl, python, perl, textual-window-manager }:
 
 stdenv.mkDerivation rec {
   version = "5.125";
diff --git a/pkgs/tools/misc/colord/default.nix b/pkgs/tools/misc/colord/default.nix
index 4461834cb74d..a5d71a9487cc 100644
--- a/pkgs/tools/misc/colord/default.nix
+++ b/pkgs/tools/misc/colord/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchurl, bash-completion
 , glib, polkit, pkgconfig, gettext, gusb, lcms2, sqlite, systemd, dbus
 , gobjectIntrospection, argyllcms, meson, ninja, libxml2, vala_0_40
-, libgudev, sane-backends, udev, gnome3, makeWrapper }:
+, libgudev, sane-backends, gnome3, makeWrapper }:
 
 stdenv.mkDerivation rec {
   name = "colord-1.4.2";
diff --git a/pkgs/tools/misc/dashing/default.nix b/pkgs/tools/misc/dashing/default.nix
index 673e5c4c321f..a8a878b1998d 100644
--- a/pkgs/tools/misc/dashing/default.nix
+++ b/pkgs/tools/misc/dashing/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v1.2.1
-{ stdenv, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "dashing-unstable-${version}";
diff --git a/pkgs/tools/misc/debootstrap/default.nix b/pkgs/tools/misc/debootstrap/default.nix
index 054822e60699..b3a654be04e4 100644
--- a/pkgs/tools/misc/debootstrap/default.nix
+++ b/pkgs/tools/misc/debootstrap/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, dpkg, gettext, gawk, perl, wget, coreutils, fakeroot }:
+{ stdenv, fetchurl, dpkg, gettext, gawk, perl, wget, coreutils }:
 
 # USAGE like this: debootstrap sid /tmp/target-chroot-directory
 # There is also cdebootstrap now. Is that easier to maintain?
diff --git a/pkgs/tools/misc/direnv/default.nix b/pkgs/tools/misc/direnv/default.nix
index e22bce7c6989..508fc77a9a03 100644
--- a/pkgs/tools/misc/direnv/default.nix
+++ b/pkgs/tools/misc/direnv/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, buildGoPackage, bash, writeText}:
+{ stdenv, fetchFromGitHub, buildGoPackage, bash}:
 
 buildGoPackage rec {
   name = "direnv-${version}";
diff --git a/pkgs/tools/misc/dust/default.nix b/pkgs/tools/misc/dust/default.nix
index f34d05758cf4..aa23b51f4b89 100644
--- a/pkgs/tools/misc/dust/default.nix
+++ b/pkgs/tools/misc/dust/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, cargo, rustPlatform }:
+{ stdenv, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   name = "dust-${version}";
diff --git a/pkgs/tools/misc/fluentd/default.nix b/pkgs/tools/misc/fluentd/default.nix
index 8219d110f2ef..c9ee511ff830 100644
--- a/pkgs/tools/misc/fluentd/default.nix
+++ b/pkgs/tools/misc/fluentd/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, bundlerEnv, ruby, curl }:
+{ lib, bundlerEnv, ruby }:
 
 bundlerEnv {
   inherit ruby;
diff --git a/pkgs/tools/misc/fontforge/default.nix b/pkgs/tools/misc/fontforge/default.nix
index 0f6fb38ef3bc..04717974a8b3 100644
--- a/pkgs/tools/misc/fontforge/default.nix
+++ b/pkgs/tools/misc/fontforge/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, lib
+{ stdenv, fetchFromGitHub, lib
 , autoconf, automake, gnum4, libtool, perl, gnulib, uthash, pkgconfig, gettext
 , python, freetype, zlib, glib, libungif, libpng, libjpeg, libtiff, libxml2, pango
 , withSpiro ? false, libspiro
diff --git a/pkgs/tools/misc/fzf/default.nix b/pkgs/tools/misc/fzf/default.nix
index ba85c5376db1..e8e2152f7110 100644
--- a/pkgs/tools/misc/fzf/default.nix
+++ b/pkgs/tools/misc/fzf/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, ncurses, buildGoPackage, fetchFromGitHub, writeText }:
+{ stdenv, ncurses, buildGoPackage, fetchFromGitHub, writeText }:
 
 buildGoPackage rec {
   name = "fzf-${version}";
diff --git a/pkgs/tools/misc/gams/default.nix b/pkgs/tools/misc/gams/default.nix
index 84d3239729f5..990282b2d584 100644
--- a/pkgs/tools/misc/gams/default.nix
+++ b/pkgs/tools/misc/gams/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, unzip, lib, file, licenseFile, optgamsFile}:
+{ stdenv, fetchurl, unzip, file, licenseFile, optgamsFile}:
 
 assert licenseFile != null;
 
diff --git a/pkgs/tools/misc/gawp/default.nix b/pkgs/tools/misc/gawp/default.nix
index 7c944ceaab3f..c187b09624ad 100644
--- a/pkgs/tools/misc/gawp/default.nix
+++ b/pkgs/tools/misc/gawp/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchgit }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 with builtins;
 
diff --git a/pkgs/tools/misc/gh-ost/default.nix b/pkgs/tools/misc/gh-ost/default.nix
index 24841a2bac79..a5871d2bc33e 100644
--- a/pkgs/tools/misc/gh-ost/default.nix
+++ b/pkgs/tools/misc/gh-ost/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 let
   goPackagePath = "github.com/github/gh-ost";
diff --git a/pkgs/tools/misc/gosu/default.nix b/pkgs/tools/misc/gosu/default.nix
index 1c1fb05050f1..d7c10220f4b7 100644
--- a/pkgs/tools/misc/gosu/default.nix
+++ b/pkgs/tools/misc/gosu/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "gosu-${version}";
diff --git a/pkgs/tools/misc/graylog/plugins.nix b/pkgs/tools/misc/graylog/plugins.nix
index 21a624c9d256..3f476cfea941 100644
--- a/pkgs/tools/misc/graylog/plugins.nix
+++ b/pkgs/tools/misc/graylog/plugins.nix
@@ -1,4 +1,4 @@
-{ pkgs,  stdenv, fetchurl, fetchFromGitHub, unzip, graylog }:
+{ pkgs,  stdenv, fetchurl, unzip, graylog }:
 
 with pkgs.lib;
 
diff --git a/pkgs/tools/misc/grub/2.0x.nix b/pkgs/tools/misc/grub/2.0x.nix
index 58c9f18ec5aa..63511782f00b 100644
--- a/pkgs/tools/misc/grub/2.0x.nix
+++ b/pkgs/tools/misc/grub/2.0x.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromSavannah, autogen, flex, bison, python, autoconf, automake
+{ stdenv, fetchurl, flex, bison, python
 , gettext, ncurses, libusb, freetype, qemu, lvm2, unifont, pkgconfig
 , fuse # only needed for grub-mount
 , zfs ? null
diff --git a/pkgs/tools/misc/hdf5/1_8.nix b/pkgs/tools/misc/hdf5/1_8.nix
index 14c8ca234331..17b48ad8741a 100644
--- a/pkgs/tools/misc/hdf5/1_8.nix
+++ b/pkgs/tools/misc/hdf5/1_8.nix
@@ -1,6 +1,5 @@
 { stdenv
 , fetchurl
-, gcc
 , removeReferencesTo
 , cpp ? false
 , gfortran ? null
diff --git a/pkgs/tools/misc/hdf5/default.nix b/pkgs/tools/misc/hdf5/default.nix
index 494616d2b485..31813c0b880a 100644
--- a/pkgs/tools/misc/hdf5/default.nix
+++ b/pkgs/tools/misc/hdf5/default.nix
@@ -1,6 +1,5 @@
 { stdenv
 , fetchurl
-, gcc
 , removeReferencesTo
 , cpp ? false
 , gfortran ? null
diff --git a/pkgs/tools/misc/hdfview/default.nix b/pkgs/tools/misc/hdfview/default.nix
index 03af224b4c05..82801da322c6 100644
--- a/pkgs/tools/misc/hdfview/default.nix
+++ b/pkgs/tools/misc/hdfview/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, cmake, ant, javac, hdf_java }:
+{ stdenv, fetchurl, ant, javac, hdf_java }:
 
 stdenv.mkDerivation rec {
   name = "hdfview-${version}";
diff --git a/pkgs/tools/misc/i3cat/default.nix b/pkgs/tools/misc/i3cat/default.nix
index 52e7793d9744..7035f2ecedff 100644
--- a/pkgs/tools/misc/i3cat/default.nix
+++ b/pkgs/tools/misc/i3cat/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "i3cat-${version}";
diff --git a/pkgs/tools/misc/libbitcoin/libbitcoin-client.nix b/pkgs/tools/misc/libbitcoin/libbitcoin-client.nix
index 8d55b2cdc00e..eb3b6aa11e6a 100644
--- a/pkgs/tools/misc/libbitcoin/libbitcoin-client.nix
+++ b/pkgs/tools/misc/libbitcoin/libbitcoin-client.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, pkgconfig, autoreconfHook
+{ stdenv, fetchFromGitHub, pkgconfig, autoreconfHook
 , boost, libbitcoin, libbitcoin-protocol }:
 
 let
diff --git a/pkgs/tools/misc/libbitcoin/libbitcoin-explorer.nix b/pkgs/tools/misc/libbitcoin/libbitcoin-explorer.nix
index e49614834ae3..d0395ecbd7f0 100644
--- a/pkgs/tools/misc/libbitcoin/libbitcoin-explorer.nix
+++ b/pkgs/tools/misc/libbitcoin/libbitcoin-explorer.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, pkgconfig, autoreconfHook
+{ stdenv, fetchFromGitHub, pkgconfig, autoreconfHook
 , boost, libbitcoin-client, libbitcoin-network }:
 
 let
diff --git a/pkgs/tools/misc/libbitcoin/libbitcoin-network.nix b/pkgs/tools/misc/libbitcoin/libbitcoin-network.nix
index c17c99980a88..cb9e2cbf1e84 100644
--- a/pkgs/tools/misc/libbitcoin/libbitcoin-network.nix
+++ b/pkgs/tools/misc/libbitcoin/libbitcoin-network.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, pkgconfig, autoreconfHook
+{ stdenv, fetchFromGitHub, pkgconfig, autoreconfHook
 , boost, libbitcoin, zeromq }:
 
 let
diff --git a/pkgs/tools/misc/libbitcoin/libbitcoin-protocol.nix b/pkgs/tools/misc/libbitcoin/libbitcoin-protocol.nix
index fbfcfc100740..2c13927dfad8 100644
--- a/pkgs/tools/misc/libbitcoin/libbitcoin-protocol.nix
+++ b/pkgs/tools/misc/libbitcoin/libbitcoin-protocol.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, pkgconfig, autoreconfHook
+{ stdenv, fetchFromGitHub, pkgconfig, autoreconfHook
 , boost, libbitcoin, secp256k1, zeromq }:
 
 let
diff --git a/pkgs/tools/misc/libbitcoin/libbitcoin.nix b/pkgs/tools/misc/libbitcoin/libbitcoin.nix
index f8910f83ec57..18177c0a7e30 100644
--- a/pkgs/tools/misc/libbitcoin/libbitcoin.nix
+++ b/pkgs/tools/misc/libbitcoin/libbitcoin.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, pkgconfig, autoreconfHook
+{ stdenv, fetchFromGitHub, pkgconfig, autoreconfHook
 , boost, secp256k1 }:
 
 let
diff --git a/pkgs/tools/misc/massren/default.nix b/pkgs/tools/misc/massren/default.nix
index 085e6f41a091..e2ff4868c9ea 100644
--- a/pkgs/tools/misc/massren/default.nix
+++ b/pkgs/tools/misc/massren/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "massren-${version}";
diff --git a/pkgs/tools/misc/mmake/default.nix b/pkgs/tools/misc/mmake/default.nix
index c6f9f4749b34..1d3a355dd950 100644
--- a/pkgs/tools/misc/mmake/default.nix
+++ b/pkgs/tools/misc/mmake/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildGoPackage, fetchFromGitHub, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "mmake-${version}";
diff --git a/pkgs/tools/misc/neofetch/default.nix b/pkgs/tools/misc/neofetch/default.nix
index 7dbfc90fa125..a076a405ce78 100644
--- a/pkgs/tools/misc/neofetch/default.nix
+++ b/pkgs/tools/misc/neofetch/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch }:
+{ stdenv, fetchFromGitHub }:
 
 stdenv.mkDerivation rec {
   name = "neofetch-${version}";
diff --git a/pkgs/tools/misc/pal/default.nix b/pkgs/tools/misc/pal/default.nix
index 267b458cccc6..be96dd9d3d35 100644
--- a/pkgs/tools/misc/pal/default.nix
+++ b/pkgs/tools/misc/pal/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, ncurses, glib, gettext, readline, pkgconfig }:
+{stdenv, fetchurl, glib, gettext, readline, pkgconfig }:
 
 stdenv.mkDerivation rec {
   name = "pal-0.4.3";
diff --git a/pkgs/tools/misc/papis/default.nix b/pkgs/tools/misc/papis/default.nix
index 260d96a981f3..52e704eb52e1 100644
--- a/pkgs/tools/misc/papis/default.nix
+++ b/pkgs/tools/misc/papis/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonApplication, lib, fetchFromGitHub, bashInteractive
+{ lib, fetchFromGitHub, bashInteractive
 , python3, vim
 }:
 
diff --git a/pkgs/tools/misc/peruse/default.nix b/pkgs/tools/misc/peruse/default.nix
index 38cab5cf8623..69b60ae0997e 100644
--- a/pkgs/tools/misc/peruse/default.nix
+++ b/pkgs/tools/misc/peruse/default.nix
@@ -1,5 +1,5 @@
 {
-  mkDerivation, fetchFromGitHub, fetchurl, lib,
+  mkDerivation, fetchFromGitHub, lib,
   extra-cmake-modules, kdoctools, wrapGAppsHook,
   baloo, karchive, kconfig, kcrash, kfilemetadata, kinit, kirigami2, knewstuff, plasma-framework
 }:
diff --git a/pkgs/tools/misc/pipelight/default.nix b/pkgs/tools/misc/pipelight/default.nix
index f39ee734d81d..c320f8ef5f6a 100644
--- a/pkgs/tools/misc/pipelight/default.nix
+++ b/pkgs/tools/misc/pipelight/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, bash, cabextract, curl, gnupg, libX11, libGLU_combined, perl, wineStaging
+{ stdenv, fetchurl, bash, cabextract, curl, gnupg, libX11, libGLU_combined, wineStaging
  }:
 
 let
diff --git a/pkgs/tools/misc/profile-sync-daemon/default.nix b/pkgs/tools/misc/profile-sync-daemon/default.nix
index 670f70677654..c1b99b315677 100644
--- a/pkgs/tools/misc/profile-sync-daemon/default.nix
+++ b/pkgs/tools/misc/profile-sync-daemon/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, rsync, glibc, gawk }:
+{ stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
   version = "5.53";
diff --git a/pkgs/tools/misc/qt5ct/default.nix b/pkgs/tools/misc/qt5ct/default.nix
index c6fdf0a5120e..a43335626acf 100644
--- a/pkgs/tools/misc/qt5ct/default.nix
+++ b/pkgs/tools/misc/qt5ct/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, qtbase, qtsvg, qttools, qmake }:
+{ stdenv, fetchurl, qtbase, qttools, qmake }:
 
 let inherit (stdenv.lib) getDev; in
 
diff --git a/pkgs/tools/misc/recutils/default.nix b/pkgs/tools/misc/recutils/default.nix
index f1712a43c3be..a1fa7dee0836 100644
--- a/pkgs/tools/misc/recutils/default.nix
+++ b/pkgs/tools/misc/recutils/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, gettext, emacs, curl, check, bc }:
+{ fetchurl, stdenv, emacs, curl, check, bc }:
 
 stdenv.mkDerivation rec {
   name = "recutils-1.7";
diff --git a/pkgs/tools/misc/s6-portable-utils/default.nix b/pkgs/tools/misc/s6-portable-utils/default.nix
index 668a3fd5c996..082eb6879c41 100644
--- a/pkgs/tools/misc/s6-portable-utils/default.nix
+++ b/pkgs/tools/misc/s6-portable-utils/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, skalibs, gcc }:
+{ stdenv, fetchurl, skalibs }:
 
 with stdenv.lib;
 
diff --git a/pkgs/tools/misc/svtplay-dl/default.nix b/pkgs/tools/misc/svtplay-dl/default.nix
index f0abb38706b0..9ba61221684a 100644
--- a/pkgs/tools/misc/svtplay-dl/default.nix
+++ b/pkgs/tools/misc/svtplay-dl/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, makeWrapper, pythonPackages, perl, zip
-, rtmpdump, substituteAll }:
+, rtmpdump }:
 
 let
   inherit (pythonPackages) python nose pycrypto requests mock;
diff --git a/pkgs/tools/misc/system-config-printer/default.nix b/pkgs/tools/misc/system-config-printer/default.nix
index 9d12fa254d47..a58eb3156384 100644
--- a/pkgs/tools/misc/system-config-printer/default.nix
+++ b/pkgs/tools/misc/system-config-printer/default.nix
@@ -1,10 +1,9 @@
 { stdenv, fetchurl, udev, intltool, pkgconfig, glib, xmlto, wrapGAppsHook
-, makeWrapper, gtk3, docbook_xml_dtd_412, docbook_xsl
+, docbook_xml_dtd_412, docbook_xsl
 , libxml2, desktop-file-utils, libusb1, cups, gdk_pixbuf, pango, atk, libnotify
 , gobjectIntrospection, libsecret
 , cups-filters
 , pythonPackages
-, withGUI ? true
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/tools/misc/t/default.nix b/pkgs/tools/misc/t/default.nix
index b9c93c639549..0ad683bd652c 100644
--- a/pkgs/tools/misc/t/default.nix
+++ b/pkgs/tools/misc/t/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, bundlerEnv, ruby }:
+{ lib, bundlerEnv, ruby }:
 
 bundlerEnv {
   name = "t-3.1.0";
diff --git a/pkgs/tools/misc/tmuxinator/default.nix b/pkgs/tools/misc/tmuxinator/default.nix
index 1f50eef0ed00..be6a5070d611 100644
--- a/pkgs/tools/misc/tmuxinator/default.nix
+++ b/pkgs/tools/misc/tmuxinator/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildRubyGem, makeWrapper, ruby }:
+{ lib, buildRubyGem, ruby }:
 
 # Cannot use bundleEnv because bundleEnv create stub with
 # BUNDLE_FROZEN='1' environment variable set, which broke everything
diff --git a/pkgs/tools/misc/tmuxp/default.nix b/pkgs/tools/misc/tmuxp/default.nix
index 3932e06192ed..dd0fb4de702e 100644
--- a/pkgs/tools/misc/tmuxp/default.nix
+++ b/pkgs/tools/misc/tmuxp/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, python }:
+{ stdenv, python }:
 
 with python.pkgs;
 
diff --git a/pkgs/tools/misc/toilet/default.nix b/pkgs/tools/misc/toilet/default.nix
index 10e481b7664b..2729f6f88594 100644
--- a/pkgs/tools/misc/toilet/default.nix
+++ b/pkgs/tools/misc/toilet/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, libcaca, figlet }:
+{ stdenv, fetchurl, pkgconfig, libcaca }:
 
 stdenv.mkDerivation rec {
   name = "toilet-${version}";
diff --git a/pkgs/tools/misc/trash-cli/default.nix b/pkgs/tools/misc/trash-cli/default.nix
index 113c7e127d4f..7ae871afc783 100644
--- a/pkgs/tools/misc/trash-cli/default.nix
+++ b/pkgs/tools/misc/trash-cli/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, fetchpatch, coreutils
-, python3, python3Packages, substituteAll }:
+, python3Packages, substituteAll }:
 
 python3Packages.buildPythonApplication rec {
   name = "trash-cli-${version}";
diff --git a/pkgs/tools/misc/upower-notify/default.nix b/pkgs/tools/misc/upower-notify/default.nix
index ff8e7873839b..7751e03df193 100644
--- a/pkgs/tools/misc/upower-notify/default.nix
+++ b/pkgs/tools/misc/upower-notify/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 # To use upower-notify, the maintainer suggests adding something like this to your configuration.nix:
 #
diff --git a/pkgs/tools/misc/urjtag/default.nix b/pkgs/tools/misc/urjtag/default.nix
index 25687a3dbe1e..48edb601a43f 100644
--- a/pkgs/tools/misc/urjtag/default.nix
+++ b/pkgs/tools/misc/urjtag/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, autoconf, automake, pkgconfig, gettext, intltool, libtool, bison
+{ stdenv, autoconf, automake, pkgconfig, gettext, libtool, bison
 , flex, which, subversion, fetchsvn, makeWrapper, libftdi, libusb, readline
 , python3
 , svfSupport ? false
diff --git a/pkgs/tools/misc/watchexec/default.nix b/pkgs/tools/misc/watchexec/default.nix
index 2b801bb74a42..b1704c3b46c6 100644
--- a/pkgs/tools/misc/watchexec/default.nix
+++ b/pkgs/tools/misc/watchexec/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, rustPlatform, fetchFromGitHub }:
+{ stdenv, rustPlatform, fetchFromGitHub }:
 
 with rustPlatform;
 
diff --git a/pkgs/tools/misc/xfstests/default.nix b/pkgs/tools/misc/xfstests/default.nix
index 80a728747fef..e03f84355cad 100644
--- a/pkgs/tools/misc/xfstests/default.nix
+++ b/pkgs/tools/misc/xfstests/default.nix
@@ -1,6 +1,6 @@
 { stdenv, acl, attr, autoconf, automake, bash, bc, coreutils, e2fsprogs
 , fetchgit, fio, gawk, keyutils, killall, lib, libaio, libcap, libtool
-, libuuid, libxfs, lvm2, openssl, perl, procps, quota, su
+, libuuid, libxfs, lvm2, openssl, perl, procps, quota
 , time, utillinux, which, writeScript, xfsprogs }:
 
 stdenv.mkDerivation {
diff --git a/pkgs/tools/misc/xvfb-run/default.nix b/pkgs/tools/misc/xvfb-run/default.nix
index 80135f4ab447..c4cfc00308e9 100644
--- a/pkgs/tools/misc/xvfb-run/default.nix
+++ b/pkgs/tools/misc/xvfb-run/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, makeWrapper, xkbcomp, xorgserver, getopt
+{ stdenv, fetchurl, makeWrapper, xorgserver, getopt
 , xauth, utillinux, which, fontsConf, gawk, coreutils }:
 let
   xvfb_run = fetchurl {
diff --git a/pkgs/tools/misc/youtube-dl/default.nix b/pkgs/tools/misc/youtube-dl/default.nix
index 90489e126fa5..be6bacd3b214 100644
--- a/pkgs/tools/misc/youtube-dl/default.nix
+++ b/pkgs/tools/misc/youtube-dl/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, targetPlatform, fetchurl, buildPythonPackage
+{ lib, fetchurl, buildPythonPackage
 , zip, ffmpeg, rtmpdump, phantomjs2, atomicparsley, pycryptodome, pandoc
 # Pandoc is required to build the package's man page. Release tarballs contain a
 # formatted man page already, though, it will still be installed. We keep the
diff --git a/pkgs/tools/misc/yubikey-neo-manager/default.nix b/pkgs/tools/misc/yubikey-neo-manager/default.nix
index 528f9aecb54f..acc0bac04ff6 100644
--- a/pkgs/tools/misc/yubikey-neo-manager/default.nix
+++ b/pkgs/tools/misc/yubikey-neo-manager/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, makeWrapper, python27Packages
+{ stdenv, fetchurl, python27Packages
 , libykneomgr, yubikey-personalization, libu2f-host }:
 
 python27Packages.buildPythonPackage rec {
diff --git a/pkgs/tools/misc/zsh-autoenv/default.nix b/pkgs/tools/misc/zsh-autoenv/default.nix
index 492b72a176ed..589e6717c7dc 100644
--- a/pkgs/tools/misc/zsh-autoenv/default.nix
+++ b/pkgs/tools/misc/zsh-autoenv/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, bash }:
+{ stdenv, fetchFromGitHub }:
 
 stdenv.mkDerivation rec {
   name = "zsh-autoenv-${version}";
diff --git a/pkgs/tools/networking/airfield/default.nix b/pkgs/tools/networking/airfield/default.nix
index 93535e935dc8..6f6009c107ba 100644
--- a/pkgs/tools/networking/airfield/default.nix
+++ b/pkgs/tools/networking/airfield/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, callPackage, python, utillinux
+{ stdenv, fetchFromGitHub
 , pkgs, makeWrapper, buildEnv
 , nodejs
 }:
diff --git a/pkgs/tools/networking/argus/default.nix b/pkgs/tools/networking/argus/default.nix
index e5c2aace4006..8b9d1e3b704c 100644
--- a/pkgs/tools/networking/argus/default.nix
+++ b/pkgs/tools/networking/argus/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, libpcap, bison, flex, cyrus_sasl, tcp_wrappers,
-  pkgconfig, procps, which, wget, lsof, net_snmp, bash, perl }:
+  pkgconfig, procps, which, wget, lsof, net_snmp, perl }:
 
 stdenv.mkDerivation rec {
   pname = "argus";
diff --git a/pkgs/tools/networking/assh/default.nix b/pkgs/tools/networking/assh/default.nix
index 7af7a8f551d1..7904ffb0d04e 100644
--- a/pkgs/tools/networking/assh/default.nix
+++ b/pkgs/tools/networking/assh/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub, openssh, makeWrapper }:
+{ stdenv, buildGoPackage, fetchFromGitHub, openssh, makeWrapper }:
 
 buildGoPackage rec {
   name = "assh-${version}";
diff --git a/pkgs/tools/networking/cmst/default.nix b/pkgs/tools/networking/cmst/default.nix
index 1d9e2e1677fd..e20d62d1f077 100644
--- a/pkgs/tools/networking/cmst/default.nix
+++ b/pkgs/tools/networking/cmst/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, qmake, qtbase, libX11 }:
+{ stdenv, fetchFromGitHub, qmake, qtbase }:
 
 stdenv.mkDerivation rec {
   name = "cmst-${version}";
diff --git a/pkgs/tools/networking/connman/default.nix b/pkgs/tools/networking/connman/default.nix
index f6e0608ca7f8..e960f8c3a848 100644
--- a/pkgs/tools/networking/connman/default.nix
+++ b/pkgs/tools/networking/connman/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, pkgconfig, openconnect, file, gawk,
+{ stdenv, fetchurl, pkgconfig, openconnect, file, gawk,
   openvpn, vpnc, glib, dbus, iptables, gnutls, polkit,
   wpa_supplicant, readline6, pptp, ppp }:
 
diff --git a/pkgs/tools/networking/dd-agent/default.nix b/pkgs/tools/networking/dd-agent/default.nix
index 1038882573bc..ff4a24fb7810 100644
--- a/pkgs/tools/networking/dd-agent/default.nix
+++ b/pkgs/tools/networking/dd-agent/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, pythonPackages
-, sysstat, unzip, makeWrapper }:
+, unzip, makeWrapper }:
 let
   inherit (pythonPackages) python;
   docker_1_10 = pythonPackages.buildPythonPackage rec {
diff --git a/pkgs/tools/networking/dnsmasq/default.nix b/pkgs/tools/networking/dnsmasq/default.nix
index be14db79880f..9adb95d1d3fb 100644
--- a/pkgs/tools/networking/dnsmasq/default.nix
+++ b/pkgs/tools/networking/dnsmasq/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, pkgconfig, dbus, nettle
-, libidn, libnetfilter_conntrack, fetchpatch }:
+, libidn, libnetfilter_conntrack }:
 
 with stdenv.lib;
 let
diff --git a/pkgs/tools/networking/flannel/default.nix b/pkgs/tools/networking/flannel/default.nix
index 732051d8ec78..e440d35e8210 100644
--- a/pkgs/tools/networking/flannel/default.nix
+++ b/pkgs/tools/networking/flannel/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 with lib;
 
diff --git a/pkgs/tools/networking/i2pd/default.nix b/pkgs/tools/networking/i2pd/default.nix
index c7d7b5ec6dfd..12f68af7d0a6 100644
--- a/pkgs/tools/networking/i2pd/default.nix
+++ b/pkgs/tools/networking/i2pd/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch
+{ stdenv, fetchFromGitHub
 , boost, zlib, openssl
 , upnpSupport ? true, miniupnpc ? null
 , aesniSupport ? false
diff --git a/pkgs/tools/networking/inadyn/default.nix b/pkgs/tools/networking/inadyn/default.nix
index 9d588f6fa5e1..2bd76188a638 100644
--- a/pkgs/tools/networking/inadyn/default.nix
+++ b/pkgs/tools/networking/inadyn/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, autoreconfHook, pkgconfig
+{ stdenv, fetchFromGitHub, autoreconfHook, pkgconfig
 , gnutls, libite, libconfuse }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/tools/networking/ipv6calc/default.nix b/pkgs/tools/networking/ipv6calc/default.nix
index f28c75774db5..c66218c48986 100644
--- a/pkgs/tools/networking/ipv6calc/default.nix
+++ b/pkgs/tools/networking/ipv6calc/default.nix
@@ -1,6 +1,5 @@
 { stdenv, fetchurl, getopt, ip2location-c, openssl, perl
-, geoip ? null, geolite-legacy ? null
-, ip2location-database ? null }:
+, geoip ? null, geolite-legacy ? null }:
 
 stdenv.mkDerivation rec {
   name = "ipv6calc-${version}";
diff --git a/pkgs/tools/networking/maxscale/default.nix b/pkgs/tools/networking/maxscale/default.nix
index 425e531419e4..a7648fd59c35 100644
--- a/pkgs/tools/networking/maxscale/default.nix
+++ b/pkgs/tools/networking/maxscale/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, cmake, pkgconfig, gcc, glibc
+{ stdenv, fetchFromGitHub, cmake, pkgconfig, glibc
 , bison2, curl, flex, gperftools, jansson, jemalloc, kerberos, lua, mariadb
 , ncurses, openssl, pcre, pcre2, perl, rabbitmq-c, sqlite, tcl
 , libaio, libedit, libtool, libui, libuuid, zlib
diff --git a/pkgs/tools/networking/network-manager/default.nix b/pkgs/tools/networking/network-manager/default.nix
index 85c285fd3ece..62c9e7b63d16 100644
--- a/pkgs/tools/networking/network-manager/default.nix
+++ b/pkgs/tools/networking/network-manager/default.nix
@@ -2,7 +2,7 @@
 , systemd, libuuid, polkit, gnutls, ppp, dhcp, iptables
 , libgcrypt, dnsmasq, bluez5, readline
 , gobjectIntrospection, modemmanager, openresolv, libndp, newt, libsoup
-, ethtool, iputils, gnused, coreutils, file, inetutils, kmod, jansson, libxslt
+, ethtool, gnused, coreutils, file, inetutils, kmod, jansson, libxslt
 , python3Packages, docbook_xsl, openconnect, curl, autoreconfHook }:
 
 let
diff --git a/pkgs/tools/networking/network-manager/dmenu.nix b/pkgs/tools/networking/network-manager/dmenu.nix
index 82810e714d52..93827eebb571 100644
--- a/pkgs/tools/networking/network-manager/dmenu.nix
+++ b/pkgs/tools/networking/network-manager/dmenu.nix
@@ -1,5 +1,5 @@
 { stdenv, glib, fetchFromGitHub, networkmanager, python3Packages
-, gobjectIntrospection, dmenu }:
+, gobjectIntrospection }:
 
 let inherit (python3Packages) python pygobject3;
 in stdenv.mkDerivation rec {
diff --git a/pkgs/tools/networking/network-manager/fortisslvpn.nix b/pkgs/tools/networking/network-manager/fortisslvpn.nix
index 73aaea06c917..54046a23b7df 100644
--- a/pkgs/tools/networking/network-manager/fortisslvpn.nix
+++ b/pkgs/tools/networking/network-manager/fortisslvpn.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, openfortivpn, automake, autoconf, libtool, intltool, pkgconfig,
-networkmanager, ppp, lib, libsecret, withGnome ? true, gnome3, procps, kmod }:
+networkmanager, ppp, libsecret, withGnome ? true, gnome3 }:
 
 let
   pname   = "NetworkManager-fortisslvpn";
diff --git a/pkgs/tools/networking/network-manager/openvpn/default.nix b/pkgs/tools/networking/network-manager/openvpn/default.nix
index 2eef7f31ab55..28b7c873d364 100644
--- a/pkgs/tools/networking/network-manager/openvpn/default.nix
+++ b/pkgs/tools/networking/network-manager/openvpn/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, substituteAll, openvpn, intltool, libxml2, pkgconfig, networkmanager, libsecret
-, withGnome ? true, gnome3, procps, kmod }:
+, withGnome ? true, gnome3, kmod }:
 
 let
   pname   = "NetworkManager-openvpn";
diff --git a/pkgs/tools/networking/ngrok-1/default.nix b/pkgs/tools/networking/ngrok-1/default.nix
index e354ad223b8c..26bcc8f803f1 100644
--- a/pkgs/tools/networking/ngrok-1/default.nix
+++ b/pkgs/tools/networking/ngrok-1/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, pkgconfig, buildGoPackage, go-bindata, fetchFromGitHub }:
+{ buildGoPackage, go-bindata, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "ngrok-${version}";
diff --git a/pkgs/tools/networking/openssh/default.nix b/pkgs/tools/networking/openssh/default.nix
index 46c0ee0f2768..04a77176682d 100644
--- a/pkgs/tools/networking/openssh/default.nix
+++ b/pkgs/tools/networking/openssh/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, zlib, openssl, perl, libedit, pkgconfig, pam, autoreconfHook
+{ stdenv, fetchurl, fetchpatch, zlib, openssl, libedit, pkgconfig, pam, autoreconfHook
 , etcDir ? null
 , hpnSupport ? false
 , withKerberos ? true
diff --git a/pkgs/tools/networking/s3gof3r/default.nix b/pkgs/tools/networking/s3gof3r/default.nix
index a13d6599ffb0..3814af60112e 100644
--- a/pkgs/tools/networking/s3gof3r/default.nix
+++ b/pkgs/tools/networking/s3gof3r/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "s3gof3r-${version}";
diff --git a/pkgs/tools/networking/shadowsocks-libev/default.nix b/pkgs/tools/networking/shadowsocks-libev/default.nix
index d2e8a9a30519..09fa69dd37c4 100644
--- a/pkgs/tools/networking/shadowsocks-libev/default.nix
+++ b/pkgs/tools/networking/shadowsocks-libev/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchgit, cmake
+{ stdenv, fetchgit, cmake
 , libsodium, mbedtls, libev, c-ares, pcre
 , asciidoc, xmlto, docbook_xml_dtd_45, docbook_xsl, libxslt
 }:
diff --git a/pkgs/tools/networking/skydive/default.nix b/pkgs/tools/networking/skydive/default.nix
index ce2a8cf6a7f3..e72147937445 100644
--- a/pkgs/tools/networking/skydive/default.nix
+++ b/pkgs/tools/networking/skydive/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub, perl
+{ lib, buildGoPackage, fetchFromGitHub, perl
 , go-bindata, libxml2, protobuf3_1, libpcap, pkgconfig, go-protobuf }:
 
 buildGoPackage rec {
diff --git a/pkgs/tools/networking/srelay/default.nix b/pkgs/tools/networking/srelay/default.nix
index a3f08cb5a077..7d3f773b1930 100644
--- a/pkgs/tools/networking/srelay/default.nix
+++ b/pkgs/tools/networking/srelay/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, openssl }:
+{ stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
   name = "srelay-0.4.8";
diff --git a/pkgs/tools/networking/tcpdump/default.nix b/pkgs/tools/networking/tcpdump/default.nix
index 59cc89ac5727..8b4850a6347c 100644
--- a/pkgs/tools/networking/tcpdump/default.nix
+++ b/pkgs/tools/networking/tcpdump/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, libpcap }:
+{ stdenv, fetchurl, libpcap }:
 
 stdenv.mkDerivation rec {
   name = "tcpdump-${version}";
diff --git a/pkgs/tools/networking/tcptraceroute/default.nix b/pkgs/tools/networking/tcptraceroute/default.nix
index 9e13cfc59c1c..cfb627e8b3b9 100644
--- a/pkgs/tools/networking/tcptraceroute/default.nix
+++ b/pkgs/tools/networking/tcptraceroute/default.nix
@@ -1,4 +1,4 @@
-{ stdenv , pkgs , fetchurl, libpcap, libnet
+{ stdenv  , fetchurl, libpcap, libnet
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/tools/networking/tftp-hpa/default.nix b/pkgs/tools/networking/tftp-hpa/default.nix
index b9abba2cd0da..bc97d5d8d6e4 100644
--- a/pkgs/tools/networking/tftp-hpa/default.nix
+++ b/pkgs/tools/networking/tftp-hpa/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, tcp_wrappers }:
+{ stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
   name = "tftp-hpa-${version}";
diff --git a/pkgs/tools/networking/tinc/pre.nix b/pkgs/tools/networking/tinc/pre.nix
index db4b6a2281d4..09c737c048ae 100644
--- a/pkgs/tools/networking/tinc/pre.nix
+++ b/pkgs/tools/networking/tinc/pre.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchgit, fetchpatch, autoreconfHook, texinfo, ncurses, readline, zlib, lzo, openssl }:
+{ stdenv, fetchgit, autoreconfHook, texinfo, ncurses, readline, zlib, lzo, openssl }:
 
 stdenv.mkDerivation rec {
   name = "tinc-${version}";
diff --git a/pkgs/tools/networking/ua/default.nix b/pkgs/tools/networking/ua/default.nix
index 5fe69ede1a7d..ea40a541a224 100644
--- a/pkgs/tools/networking/ua/default.nix
+++ b/pkgs/tools/networking/ua/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn
+{ stdenv, buildGoPackage, fetchgit
 , pkgconfig
 , glib, libxml2
 }:
diff --git a/pkgs/tools/networking/wicd/default.nix b/pkgs/tools/networking/wicd/default.nix
index fe315666a2ea..9f67dd4e2c30 100644
--- a/pkgs/tools/networking/wicd/default.nix
+++ b/pkgs/tools/networking/wicd/default.nix
@@ -1,7 +1,6 @@
 { stdenv, fetchurl, python2Packages
 , wpa_supplicant, dhcp, dhcpcd, wirelesstools
-, nettools, openresolv, iproute, iputils
-, locale ? "C" }:
+, nettools, openresolv, iproute, iputils }:
 
 let
   inherit (python2Packages) python pygobject2 dbus-python pyGtkGlade pycairo;
diff --git a/pkgs/tools/networking/zap/default.nix b/pkgs/tools/networking/zap/default.nix
index 263a44615305..7dc0e07f9451 100644
--- a/pkgs/tools/networking/zap/default.nix
+++ b/pkgs/tools/networking/zap/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, jre, jdk, ant }:
+{ stdenv, fetchFromGitHub, jdk, ant }:
 
 stdenv.mkDerivation rec {
   name = "zap-${version}";
diff --git a/pkgs/tools/package-management/nix-prefetch-scripts/default.nix b/pkgs/tools/package-management/nix-prefetch-scripts/default.nix
index a2ff38ab3004..69e978d3439d 100644
--- a/pkgs/tools/package-management/nix-prefetch-scripts/default.nix
+++ b/pkgs/tools/package-management/nix-prefetch-scripts/default.nix
@@ -1,5 +1,5 @@
 { stdenv, makeWrapper, buildEnv,
-  git, subversion, mercurial, bazaar, cvs, unzip, curl, gnused, coreutils, nix
+  git, subversion, mercurial, bazaar, cvs, gnused, coreutils, nix
 }:
 
 let mkPrefetchScript = tool: src: deps:
diff --git a/pkgs/tools/package-management/nix-repl/default.nix b/pkgs/tools/package-management/nix-repl/default.nix
index facf47ebca67..9fe6ec6e291b 100644
--- a/pkgs/tools/package-management/nix-repl/default.nix
+++ b/pkgs/tools/package-management/nix-repl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, nix, readline, boehmgc }:
+{ lib, stdenv, fetchFromGitHub, nix, readline }:
 
 let rev = "a1ea85e92b067a0a42354a28355c633eac7be65c"; in
 
diff --git a/pkgs/tools/package-management/nix-serve/default.nix b/pkgs/tools/package-management/nix-serve/default.nix
index d03e6f614e57..660dce347a5b 100644
--- a/pkgs/tools/package-management/nix-serve/default.nix
+++ b/pkgs/tools/package-management/nix-serve/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch,
+{ stdenv, fetchFromGitHub,
   bzip2, nix, perl, perlPackages,
 }:
 
diff --git a/pkgs/tools/package-management/nixops/generic.nix b/pkgs/tools/package-management/nixops/generic.nix
index da62eba63fd3..105cb6d7ab0f 100644
--- a/pkgs/tools/package-management/nixops/generic.nix
+++ b/pkgs/tools/package-management/nixops/generic.nix
@@ -1,4 +1,4 @@
-{ lib, python2Packages, fetchurl, libxslt, docbook_xsl_ns, openssh
+{ lib, python2Packages, libxslt, docbook_xsl_ns, openssh
 # version args
 , src, version
 }:
diff --git a/pkgs/tools/package-management/nixops/nixops-dns.nix b/pkgs/tools/package-management/nixops/nixops-dns.nix
index 27edfa890fcf..ce31de9f65d3 100644
--- a/pkgs/tools/package-management/nixops/nixops-dns.nix
+++ b/pkgs/tools/package-management/nixops/nixops-dns.nix
@@ -1,5 +1,4 @@
 { lib
-, stdenv
 , buildGoPackage
 , fetchFromGitHub }:
 
diff --git a/pkgs/tools/package-management/nixui/default.nix b/pkgs/tools/package-management/nixui/default.nix
index 2d1e1fb326ae..6f46b39e65b1 100644
--- a/pkgs/tools/package-management/nixui/default.nix
+++ b/pkgs/tools/package-management/nixui/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, pkgs, fetchgit, nix, node_webkit, config, makeDesktopItem
+{ stdenv, pkgs, fetchgit, nix, node_webkit, makeDesktopItem
 , writeScript }:
 let
   version = "0.2.1";
diff --git a/pkgs/tools/package-management/packagekit/qt.nix b/pkgs/tools/package-management/packagekit/qt.nix
index c38ef25f3548..f0f05a4c858e 100644
--- a/pkgs/tools/package-management/packagekit/qt.nix
+++ b/pkgs/tools/package-management/packagekit/qt.nix
@@ -1,5 +1,5 @@
-{ stdenv, lib, fetchFromGitHub, cmake, pkgconfig
-, qtbase, qttools, packagekit }:
+{ stdenv, fetchFromGitHub, cmake, pkgconfig
+, qttools, packagekit }:
 
 stdenv.mkDerivation rec {
   name = "packagekit-qt-${version}";
diff --git a/pkgs/tools/security/afl/default.nix b/pkgs/tools/security/afl/default.nix
index 1ff0ad6f6b68..c61cbeb32682 100644
--- a/pkgs/tools/security/afl/default.nix
+++ b/pkgs/tools/security/afl/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, bash, callPackage, makeWrapper
+{ stdenv, fetchurl, callPackage, makeWrapper
 , clang, llvm, which, libcgroup
 }:
 
diff --git a/pkgs/tools/security/afl/qemu.nix b/pkgs/tools/security/afl/qemu.nix
index d21500960fec..7637dcf246af 100644
--- a/pkgs/tools/security/afl/qemu.nix
+++ b/pkgs/tools/security/afl/qemu.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, python2, zlib, pkgconfig, glib, ncurses, perl
-, attr, libcap, vde2, alsaLib, texinfo, libuuid, flex, bison, lzo, snappy
+, attr, libcap, vde2, texinfo, libuuid, flex, bison, lzo, snappy
 , libaio, libcap_ng, gnutls, pixman, autoconf
 , writeText
 }:
diff --git a/pkgs/tools/security/cfssl/default.nix b/pkgs/tools/security/cfssl/default.nix
index 91a5fa4bdd24..b3c256ae59bf 100644
--- a/pkgs/tools/security/cfssl/default.nix
+++ b/pkgs/tools/security/cfssl/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub, pkgs }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "cfssl-${version}";
diff --git a/pkgs/tools/security/cipherscan/default.nix b/pkgs/tools/security/cipherscan/default.nix
index 859c1fdf49a0..a4afa772d10e 100644
--- a/pkgs/tools/security/cipherscan/default.nix
+++ b/pkgs/tools/security/cipherscan/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, pkgconfig, openssl, makeWrapper, python, coreutils }:
+{ stdenv, lib, fetchFromGitHub, openssl, makeWrapper, python, coreutils }:
 
 stdenv.mkDerivation rec {
   name = "cipherscan-${version}";
diff --git a/pkgs/tools/security/clamav/default.nix b/pkgs/tools/security/clamav/default.nix
index 79644d357745..825993937246 100644
--- a/pkgs/tools/security/clamav/default.nix
+++ b/pkgs/tools/security/clamav/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, pkgconfig
+{ stdenv, fetchurl, pkgconfig
 , zlib, bzip2, libiconv, libxml2, openssl, ncurses, curl, libmilter, pcre2
 , libmspack, systemd
 }:
diff --git a/pkgs/tools/security/diceware/default.nix b/pkgs/tools/security/diceware/default.nix
index 07061aa0d117..32819b603f90 100644
--- a/pkgs/tools/security/diceware/default.nix
+++ b/pkgs/tools/security/diceware/default.nix
@@ -1,6 +1,5 @@
 { lib
 , pythonPackages
-, fetchpatch
 }:
 
 with pythonPackages;
diff --git a/pkgs/tools/security/enpass/default.nix b/pkgs/tools/security/enpass/default.nix
index f27f9af59c68..b99087e475d2 100644
--- a/pkgs/tools/security/enpass/default.nix
+++ b/pkgs/tools/security/enpass/default.nix
@@ -1,7 +1,7 @@
 {stdenv, system, fetchurl, dpkg, openssl, xorg
 , glib, libGLU_combined, libpulseaudio, zlib, dbus, fontconfig, freetype
 , gtk2, pango, atk, cairo, gdk_pixbuf, jasper, xkeyboardconfig
-, makeWrapper , makeDesktopItem, python, pythonPackages, lib
+, makeWrapper , python, pythonPackages, lib
 , libredirect, lsof}:
 
 let
diff --git a/pkgs/tools/security/gnupg/22.nix b/pkgs/tools/security/gnupg/22.nix
index b0381b32bcfe..fd773da4adea 100644
--- a/pkgs/tools/security/gnupg/22.nix
+++ b/pkgs/tools/security/gnupg/22.nix
@@ -1,4 +1,4 @@
-{ fetchurl, fetchpatch, stdenv, pkgconfig, libgcrypt, libassuan, libksba
+{ fetchurl, stdenv, pkgconfig, libgcrypt, libassuan, libksba
 , libiconv, npth, gettext, texinfo, pcsclite, sqlite
 
 # Each of the dependencies below are optional.
diff --git a/pkgs/tools/security/gorilla-bin/default.nix b/pkgs/tools/security/gorilla-bin/default.nix
index cbd260455d8e..df9d42211f6c 100644
--- a/pkgs/tools/security/gorilla-bin/default.nix
+++ b/pkgs/tools/security/gorilla-bin/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, makeWrapper, patchelf, pkgs, stdenv, libXft, libX11, freetype, fontconfig, libXrender, libXScrnSaver, libXext }:
+{ fetchurl, makeWrapper, patchelf, stdenv, libXft, libX11, freetype, fontconfig, libXrender, libXScrnSaver, libXext }:
 
 stdenv.mkDerivation rec {
   name = "gorilla-bin-${version}";
diff --git a/pkgs/tools/security/hash-slinger/default.nix b/pkgs/tools/security/hash-slinger/default.nix
index fd78d9b2efbf..385a201d88b0 100644
--- a/pkgs/tools/security/hash-slinger/default.nix
+++ b/pkgs/tools/security/hash-slinger/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, pythonPackages, openssh, gnupg, unbound, libreswan }:
+{ stdenv, fetchFromGitHub, pythonPackages, unbound, libreswan }:
 
 let
   inherit (pythonPackages) python;
diff --git a/pkgs/tools/security/hologram/default.nix b/pkgs/tools/security/hologram/default.nix
index 5d873885b1fd..e6c375599a92 100644
--- a/pkgs/tools/security/hologram/default.nix
+++ b/pkgs/tools/security/hologram/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "hologram-2018-03-19";
diff --git a/pkgs/tools/security/jd-gui/default.nix b/pkgs/tools/security/jd-gui/default.nix
index d9617e3eb2ba..62b92b7d0bdd 100644
--- a/pkgs/tools/security/jd-gui/default.nix
+++ b/pkgs/tools/security/jd-gui/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, gradle_2_5, perl, makeWrapper, jre, makeDesktopItem, writeShellScriptBin, writeText }:
+{ stdenv, fetchurl, gradle_2_5, perl, makeWrapper, jre, makeDesktopItem, writeText }:
 
 let
   version = "1.4.0";
diff --git a/pkgs/tools/security/john/default.nix b/pkgs/tools/security/john/default.nix
index e55e97656f63..862b4a0df6e2 100644
--- a/pkgs/tools/security/john/default.nix
+++ b/pkgs/tools/security/john/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, openssl, nss, nspr, kerberos, gmp, zlib, libpcap, re2
-, writeText, gcc, pythonPackages, perl, perlPackages, makeWrapper
+, gcc, pythonPackages, perl, perlPackages, makeWrapper
 }:
 
 with stdenv.lib;
diff --git a/pkgs/tools/security/keybase/gui.nix b/pkgs/tools/security/keybase/gui.nix
index 1a7cf30b9528..549794b78313 100644
--- a/pkgs/tools/security/keybase/gui.nix
+++ b/pkgs/tools/security/keybase/gui.nix
@@ -1,6 +1,6 @@
-{ stdenv, fetchurl, buildFHSUserEnv, writeTextFile, alsaLib, atk, cairo, cups
+{ stdenv, fetchurl, alsaLib, atk, cairo, cups
 , dbus, expat, fontconfig, freetype, gcc, gdk_pixbuf, glib, gnome2, gtk3
-, libnotify, nspr, nss, pango, systemd, xorg, utillinuxMinimal }:
+, libnotify, nspr, nss, pango, systemd, xorg }:
 
 let
   libPath = stdenv.lib.makeLibraryPath [
diff --git a/pkgs/tools/security/pass/default.nix b/pkgs/tools/security/pass/default.nix
index c7e9267dde71..007414d68a5e 100644
--- a/pkgs/tools/security/pass/default.nix
+++ b/pkgs/tools/security/pass/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, pkgs, fetchurl, fetchFromGitHub, buildEnv
+{ stdenv, lib, pkgs, fetchurl, buildEnv
 , coreutils, gnused, getopt, git, tree, gnupg, which, procps, qrencode
 , makeWrapper
 
diff --git a/pkgs/tools/security/pinentry/mac.nix b/pkgs/tools/security/pinentry/mac.nix
index b198d7446a92..4acdd6cb897e 100644
--- a/pkgs/tools/security/pinentry/mac.nix
+++ b/pkgs/tools/security/pinentry/mac.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, fetchFromGitHub, xcbuildHook, libiconv, Cocoa, ncurses }:
+{ stdenv, fetchFromGitHub, xcbuildHook, libiconv, Cocoa, ncurses }:
 
 stdenv.mkDerivation rec {
   name = "pinentry-mac-0.9.4";
diff --git a/pkgs/tools/security/qesteidutil/default.nix b/pkgs/tools/security/qesteidutil/default.nix
index 0c6d15e7d776..016017205ab4 100644
--- a/pkgs/tools/security/qesteidutil/default.nix
+++ b/pkgs/tools/security/qesteidutil/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch
+{ stdenv, fetchFromGitHub
 , cmake, ccid, qttools, qttranslations
 , pkgconfig, pcsclite, hicolor-icon-theme 
 }:
diff --git a/pkgs/tools/security/saml2aws/default.nix b/pkgs/tools/security/saml2aws/default.nix
index bf5f9116f08c..047706cd8a68 100644
--- a/pkgs/tools/security/saml2aws/default.nix
+++ b/pkgs/tools/security/saml2aws/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "saml2aws-${version}";
diff --git a/pkgs/tools/security/sops/default.nix b/pkgs/tools/security/sops/default.nix
index 26faf2c730c6..bbcfc4c78907 100644
--- a/pkgs/tools/security/sops/default.nix
+++ b/pkgs/tools/security/sops/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "sops-${version}";
diff --git a/pkgs/tools/security/ssdeep/default.nix b/pkgs/tools/security/ssdeep/default.nix
index 0a9804a743bc..50b16ad58399 100644
--- a/pkgs/tools/security/ssdeep/default.nix
+++ b/pkgs/tools/security/ssdeep/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, patchelf }:
+{ stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
   name    = "ssdeep-${version}";
diff --git a/pkgs/tools/security/theharvester/default.nix b/pkgs/tools/security/theharvester/default.nix
index f1bac7adba10..0c0cf29f977f 100644
--- a/pkgs/tools/security/theharvester/default.nix
+++ b/pkgs/tools/security/theharvester/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, makeWrapper, python2Packages, fetchFromGitHub, python2 }:
+{ stdenv, makeWrapper, python2Packages, fetchFromGitHub }:
 
 stdenv.mkDerivation rec {
   pname = "theHarvester";
diff --git a/pkgs/tools/security/tor/update.nix b/pkgs/tools/security/tor/update.nix
index 6a7682a8f578..c944883d4178 100644
--- a/pkgs/tools/security/tor/update.nix
+++ b/pkgs/tools/security/tor/update.nix
@@ -1,6 +1,5 @@
 { lib
 , writeScript
-, runCommand
 , common-updater-scripts
 , bash
 , coreutils
diff --git a/pkgs/tools/security/vulnix/default.nix b/pkgs/tools/security/vulnix/default.nix
index 6e099e5d7864..4f2671aeacbf 100644
--- a/pkgs/tools/security/vulnix/default.nix
+++ b/pkgs/tools/security/vulnix/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, pythonPackages, fetchurl, callPackage, nix, ronn }:
+{ stdenv, pythonPackages, nix, ronn }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "vulnix";
diff --git a/pkgs/tools/system/bootchart/default.nix b/pkgs/tools/system/bootchart/default.nix
index f99d22becdb8..9cba7df21b7d 100644
--- a/pkgs/tools/system/bootchart/default.nix
+++ b/pkgs/tools/system/bootchart/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, lib, pkgconfig, glib, gtk2, python27, python2Packages }:
+{stdenv, fetchurl, pkgconfig, glib, gtk2, python2Packages }:
 
 stdenv.mkDerivation rec {
   version = "0.14.7";
diff --git a/pkgs/tools/system/confd/default.nix b/pkgs/tools/system/confd/default.nix
index ebe654d946e3..3dc2a5caeb91 100644
--- a/pkgs/tools/system/confd/default.nix
+++ b/pkgs/tools/system/confd/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "confd-${version}";
diff --git a/pkgs/tools/system/consul-template/default.nix b/pkgs/tools/system/consul-template/default.nix
index e664c0ef8e2c..35c57dd8ea91 100644
--- a/pkgs/tools/system/consul-template/default.nix
+++ b/pkgs/tools/system/consul-template/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "consul-template-${version}";
diff --git a/pkgs/tools/system/ddrescue/default.nix b/pkgs/tools/system/ddrescue/default.nix
index fc42c3b856f6..2f507de9c22f 100644
--- a/pkgs/tools/system/ddrescue/default.nix
+++ b/pkgs/tools/system/ddrescue/default.nix
@@ -1,6 +1,5 @@
 { stdenv
 , fetchurl, lzip
-, hostPlatform, buildPlatform
 }:
 
 let inherit (stdenv.lib) optionals; in
diff --git a/pkgs/tools/system/evemu/default.nix b/pkgs/tools/system/evemu/default.nix
index b6f1af7b23fe..5a902914b37b 100644
--- a/pkgs/tools/system/evemu/default.nix
+++ b/pkgs/tools/system/evemu/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchgit, autoreconfHook, pkgconfig, pythonPackages
-, libevdev, linuxHeaders
+, libevdev
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/tools/system/gohai/default.nix b/pkgs/tools/system/gohai/default.nix
index 77f65de9a8d0..9eef3b064a0c 100644
--- a/pkgs/tools/system/gohai/default.nix
+++ b/pkgs/tools/system/gohai/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "gohai-${version}";
diff --git a/pkgs/tools/system/journalwatch/default.nix b/pkgs/tools/system/journalwatch/default.nix
index 316b94befde3..473d245618fa 100644
--- a/pkgs/tools/system/journalwatch/default.nix
+++ b/pkgs/tools/system/journalwatch/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchurl, fetchgit, pythonOlder, systemd, pytest }:
+{ stdenv, buildPythonPackage, fetchurl, pythonOlder, systemd, pytest }:
 
 buildPythonPackage rec {
   pname = "journalwatch";
diff --git a/pkgs/tools/system/osquery/default.nix b/pkgs/tools/system/osquery/default.nix
index 7bbf42b11321..5b2be75e452f 100644
--- a/pkgs/tools/system/osquery/default.nix
+++ b/pkgs/tools/system/osquery/default.nix
@@ -4,7 +4,7 @@
 , beecrypt, augeas, libxml2, sleuthkit, yara, lldpd, google-gflags
 , thrift, boost, rocksdb_lite, glog, gbenchmark, snappy
 , openssl, file, doxygen
-, gtest, sqlite, fpm, zstd, rdkafka, rapidjson, path
+, gtest, sqlite, fpm, zstd, rdkafka, rapidjson
 }:
 
 let
diff --git a/pkgs/tools/system/pcstat/default.nix b/pkgs/tools/system/pcstat/default.nix
index cd3c815934f3..b673c0f929a6 100644
--- a/pkgs/tools/system/pcstat/default.nix
+++ b/pkgs/tools/system/pcstat/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "pcstat-unstable-${version}";
diff --git a/pkgs/tools/system/procodile/default.nix b/pkgs/tools/system/procodile/default.nix
index 3a5cb1b4965d..5414d6704232 100644
--- a/pkgs/tools/system/procodile/default.nix
+++ b/pkgs/tools/system/procodile/default.nix
@@ -1,4 +1,4 @@
-{ lib, bundlerEnv, ruby, stdenv }:
+{ lib, bundlerEnv, ruby }:
 
 bundlerEnv rec {
   name = "procodile-${version}";
diff --git a/pkgs/tools/text/codesearch/default.nix b/pkgs/tools/text/codesearch/default.nix
index 62be30319cf8..56a8133bd3a8 100644
--- a/pkgs/tools/text/codesearch/default.nix
+++ b/pkgs/tools/text/codesearch/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ stdenv, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "codesearch-${version}";
diff --git a/pkgs/tools/text/groff/default.nix b/pkgs/tools/text/groff/default.nix
index 27581134ca34..ab0f8893bfde 100644
--- a/pkgs/tools/text/groff/default.nix
+++ b/pkgs/tools/text/groff/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, perl, groff
+{ stdenv, fetchurl, perl
 , ghostscript #for postscript and html output
 , psutils, netpbm #for html output
 , buildPackages
diff --git a/pkgs/tools/text/platinum-searcher/default.nix b/pkgs/tools/text/platinum-searcher/default.nix
index c76ba8ea88d5..829d734a8f75 100644
--- a/pkgs/tools/text/platinum-searcher/default.nix
+++ b/pkgs/tools/text/platinum-searcher/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "the_platinum_searcher-${version}";
diff --git a/pkgs/tools/text/ripgrep/default.nix b/pkgs/tools/text/ripgrep/default.nix
index 11355bb6df1d..aa41e7b7f60a 100644
--- a/pkgs/tools/text/ripgrep/default.nix
+++ b/pkgs/tools/text/ripgrep/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, rustPlatform, makeWrapper, asciidoc, docbook_xsl, libxslt  }:
+{ stdenv, fetchFromGitHub, rustPlatform, asciidoc, docbook_xsl, libxslt  }:
 
 rustPlatform.buildRustPackage rec {
   name = "ripgrep-${version}";
diff --git a/pkgs/tools/text/sgml/jade/default.nix b/pkgs/tools/text/sgml/jade/default.nix
index e87a8bc02750..b7f8bd6df381 100644
--- a/pkgs/tools/text/sgml/jade/default.nix
+++ b/pkgs/tools/text/sgml/jade/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgs, gnum4 }:
+{ stdenv, fetchurl, gnum4 }:
 
 stdenv.mkDerivation rec {
   name = "jade-${version}-${debpatch}";
diff --git a/pkgs/tools/text/shfmt/default.nix b/pkgs/tools/text/shfmt/default.nix
index 7328cd3878a2..fe699b355900 100644
--- a/pkgs/tools/text/shfmt/default.nix
+++ b/pkgs/tools/text/shfmt/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "shfmt-${version}";
diff --git a/pkgs/tools/text/sift/default.nix b/pkgs/tools/text/sift/default.nix
index efa5e539bd14..421715f7c33c 100644
--- a/pkgs/tools/text/sift/default.nix
+++ b/pkgs/tools/text/sift/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "sift-${version}";
diff --git a/pkgs/tools/text/wgetpaste/default.nix b/pkgs/tools/text/wgetpaste/default.nix
index 81b90e4925de..c3db482d271a 100644
--- a/pkgs/tools/text/wgetpaste/default.nix
+++ b/pkgs/tools/text/wgetpaste/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, wget, bash, coreutils }:
+{ stdenv, fetchurl, wget, bash }:
 
 stdenv.mkDerivation rec {
   version = "2.28";
diff --git a/pkgs/tools/text/zimreader/default.nix b/pkgs/tools/text/zimreader/default.nix
index f9debaaf0615..4271bf095a14 100644
--- a/pkgs/tools/text/zimreader/default.nix
+++ b/pkgs/tools/text/zimreader/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, fetchpatch, automake, autoconf, libtool
-, zlib, openssl, zip, zimlib, cxxtools, tntnet
+, zimlib, cxxtools, tntnet
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/tools/typesetting/tectonic/default.nix b/pkgs/tools/typesetting/tectonic/default.nix
index 8ce2a6b0aa3c..fa8af0089556 100644
--- a/pkgs/tools/typesetting/tectonic/default.nix
+++ b/pkgs/tools/typesetting/tectonic/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, rustPlatform, makeWrapper
+{ stdenv, fetchFromGitHub, rustPlatform
 , darwin, fontconfig, harfbuzz-icu, openssl, pkgconfig }:
 
 rustPlatform.buildRustPackage rec {
diff --git a/pkgs/tools/typesetting/tex/nix/default.nix b/pkgs/tools/typesetting/tex/nix/default.nix
index 0566e5118705..4ee45bf4bc8f 100644
--- a/pkgs/tools/typesetting/tex/nix/default.nix
+++ b/pkgs/tools/typesetting/tex/nix/default.nix
@@ -207,7 +207,6 @@ rec {
   simpleTeXToPNG =
     { preamble ? null
     , body
-    , name ? baseNameOf (toString body)
     , packages ? []
     }:
 
@@ -227,7 +226,6 @@ rec {
   simpleTeXToPDF =
     { preamble ? null
     , body
-    , name ? baseNameOf (toString body)
     , packages ? []
     }:
 
diff --git a/pkgs/tools/typesetting/tex/texlive/bin.nix b/pkgs/tools/typesetting/tex/texlive/bin.nix
index 32894748ac46..9bc5a9b273b9 100644
--- a/pkgs/tools/typesetting/tex/texlive/bin.nix
+++ b/pkgs/tools/typesetting/tex/texlive/bin.nix
@@ -1,10 +1,10 @@
-{ stdenv, lib, fetchurl
+{ stdenv, fetchurl
 , texlive
-, zlib, bzip2, ncurses, libiconv, libpng, flex, bison, libX11, libICE, xproto
-, freetype, t1lib, gd, libXaw, icu, ghostscript, ed, libXt, libXpm, libXmu, libXext
-, xextproto, perl, libSM, ruby, expat, curl, libjpeg, python, fontconfig, pkgconfig
-, poppler, libpaper, graphite2, zziplib, harfbuzz, texinfo, potrace, gmp, mpfr
-, xpdf, cairo, pixman, xorg, clisp, biber
+, zlib, libiconv, libpng, libX11
+, freetype, gd, libXaw, icu, ghostscript, libXpm, libXmu, libXext
+, perl, pkgconfig
+, poppler, libpaper, graphite2, zziplib, harfbuzz, potrace, gmp, mpfr
+, cairo, pixman, xorg, clisp, biber
 , makeWrapper
 }:
 
diff --git a/pkgs/tools/typesetting/xmlto/default.nix b/pkgs/tools/typesetting/xmlto/default.nix
index ed3dad64f16d..939615f5797c 100644
--- a/pkgs/tools/typesetting/xmlto/default.nix
+++ b/pkgs/tools/typesetting/xmlto/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, flex, libxml2, libxslt
+{ fetchurl, stdenv, libxml2, libxslt
 , docbook_xml_dtd_45, docbook_xsl, w3m
 , bash, getopt, makeWrapper }:
 
diff --git a/pkgs/tools/video/flvtool2/default.nix b/pkgs/tools/video/flvtool2/default.nix
index dab4bf44a6f9..975e13b65da7 100644
--- a/pkgs/tools/video/flvtool2/default.nix
+++ b/pkgs/tools/video/flvtool2/default.nix
@@ -1,4 +1,4 @@
-{ buildRubyGem, lib, ruby }:
+{ buildRubyGem, ruby }:
 
 buildRubyGem rec {
   inherit ruby;
diff --git a/pkgs/tools/video/vnc2flv/default.nix b/pkgs/tools/video/vnc2flv/default.nix
index bb72fd2911f7..32cf2771b51d 100644
--- a/pkgs/tools/video/vnc2flv/default.nix
+++ b/pkgs/tools/video/vnc2flv/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pythonPackages }:
+{ fetchurl, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   name = "vnc2flv-20100207";
diff --git a/pkgs/tools/virtualization/awless/default.nix b/pkgs/tools/virtualization/awless/default.nix
index 549c830e8871..ff9a13c500b3 100644
--- a/pkgs/tools/virtualization/awless/default.nix
+++ b/pkgs/tools/virtualization/awless/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "awless-${version}";
diff --git a/pkgs/tools/virtualization/cloud-init/default.nix b/pkgs/tools/virtualization/cloud-init/default.nix
index 60ccc0f4724a..5e2f84dee1d2 100644
--- a/pkgs/tools/virtualization/cloud-init/default.nix
+++ b/pkgs/tools/virtualization/cloud-init/default.nix
@@ -1,4 +1,4 @@
-{ lib, pythonPackages, fetchurl, kmod, systemd, cloud-utils }:
+{ lib, pythonPackages, fetchurl, cloud-utils }:
 
 let version = "0.7.9";
 
diff --git a/pkgs/tools/virtualization/distrobuilder/default.nix b/pkgs/tools/virtualization/distrobuilder/default.nix
index 83a340348c8e..2286faf4d1b8 100644
--- a/pkgs/tools/virtualization/distrobuilder/default.nix
+++ b/pkgs/tools/virtualization/distrobuilder/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, pkgconfig, buildGoPackage, fetchFromGitHub
+{ stdenv, pkgconfig, buildGoPackage, fetchFromGitHub
 , makeWrapper, coreutils, gnupg, gnutar, squashfsTools, debootstrap
 }:
 
diff --git a/pkgs/tools/virtualization/euca2ools/default.nix b/pkgs/tools/virtualization/euca2ools/default.nix
index dce806cf6e34..ce628ff84b5e 100644
--- a/pkgs/tools/virtualization/euca2ools/default.nix
+++ b/pkgs/tools/virtualization/euca2ools/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchgit, which, python2Packages }:
+{ stdenv, fetchgit, python2Packages }:
 
 let
   inherit (python2Packages) buildPythonApplication boto m2crypto;
diff --git a/pkgs/tools/virtualization/google-compute-engine/default.nix b/pkgs/tools/virtualization/google-compute-engine/default.nix
index 3645de88bf8a..e987bc7986b1 100644
--- a/pkgs/tools/virtualization/google-compute-engine/default.nix
+++ b/pkgs/tools/virtualization/google-compute-engine/default.nix
@@ -2,7 +2,6 @@
 , fetchFromGitHub
 , buildPythonApplication
 , bash
-, shadow
 , systemd
 , utillinux
 , boto
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 91d2d5aaa565..598f3c009efe 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -700,9 +700,7 @@ with pkgs;
 
   xcodeenv = callPackage ../development/mobile/xcodeenv { };
 
-  titaniumenv = callPackage ../development/mobile/titaniumenv {
-    pkgs_i686 = pkgsi686Linux;
-  };
+  titaniumenv = callPackage ../development/mobile/titaniumenv { };
 
   abootimg = callPackage ../development/mobile/abootimg {};
 
@@ -5167,7 +5165,7 @@ with pkgs;
 
   sourceHighlight = callPackage ../tools/text/source-highlight { };
 
-  spaceFM = callPackage ../applications/misc/spacefm { adwaita-icon-theme = gnome3.adwaita-icon-theme; };
+  spaceFM = callPackage ../applications/misc/spacefm { };
 
   squashfsTools = callPackage ../tools/filesystems/squashfs { };
 
@@ -6756,9 +6754,8 @@ with pkgs;
     (if pluginSupport then appendToName "with-plugin" else x: x)
       (callPackage ../development/compilers/oraclejdk/jdk8psu-linux.nix { inherit installjdk pluginSupport; });
 
-  oraclejdk10distro = packageType: pluginSupport:
-    (if pluginSupport then appendToName "with-plugin" else x: x)
-      (callPackage ../development/compilers/oraclejdk/jdk10-linux.nix { inherit packageType pluginSupport; });
+  oraclejdk10distro = packageType: _:
+      (callPackage ../development/compilers/oraclejdk/jdk10-linux.nix { inherit packageType; });
 
   jikes = callPackage ../development/compilers/jikes { };
 
@@ -8639,7 +8636,6 @@ with pkgs;
 
   xcodebuild = callPackage ../development/tools/xcbuild/wrapper.nix {
     inherit (darwin.apple_sdk.frameworks) CoreServices CoreGraphics ImageIO;
-    stdenv = buildPackages.clangStdenv;
   };
   xcbuild = xcodebuild;
   xcbuildHook = makeSetupHook {
@@ -11417,7 +11413,6 @@ with pkgs;
     # XXX: mariadb doesn't built on fbsd as of nov 2015
     mysql = if (!stdenv.isFreeBSD) then mysql else null;
 
-    inherit libGL;
     inherit (pkgs.darwin) cf-private libobjc;
     inherit (pkgs.darwin.apple_sdk.frameworks) ApplicationServices OpenGL Cocoa AGL;
   };
@@ -11438,7 +11433,7 @@ with pkgs;
   qt56 = recurseIntoAttrs (makeOverridable
     (import ../development/libraries/qt-5/5.6) {
       inherit newScope;
-      inherit stdenv fetchurl makeSetupHook makeWrapper;
+      inherit stdenv fetchurl makeSetupHook;
       bison = bison2; # error: too few arguments to function 'int yylex(...
       inherit cups;
       harfbuzz = harfbuzz-icu;
@@ -11452,7 +11447,7 @@ with pkgs;
   qt59 = recurseIntoAttrs (makeOverridable
     (import ../development/libraries/qt-5/5.9) {
       inherit newScope;
-      inherit stdenv fetchurl makeSetupHook makeWrapper;
+      inherit stdenv fetchurl makeSetupHook;
       bison = bison2; # error: too few arguments to function 'int yylex(...
       inherit cups;
       harfbuzz = harfbuzz-icu;
@@ -11467,7 +11462,7 @@ with pkgs;
   qt511 = recurseIntoAttrs (makeOverridable
     (import ../development/libraries/qt-5/5.11) {
       inherit newScope;
-      inherit stdenv fetchurl fetchFromGitHub makeSetupHook makeWrapper;
+      inherit stdenv fetchurl fetchFromGitHub makeSetupHook;
       bison = bison2; # error: too few arguments to function 'int yylex(...
       inherit cups;
       harfbuzz = harfbuzz-icu;
@@ -12167,13 +12162,9 @@ with pkgs;
 
   wavpack = callPackage ../development/libraries/wavpack { };
 
-  wayland = callPackage ../development/libraries/wayland {
-    graphviz = graphviz-nox;
-  };
+  wayland = callPackage ../development/libraries/wayland { };
 
-  wayland_1_9 = callPackage ../development/libraries/wayland/1.9.nix {
-    graphviz = graphviz-nox;
-  };
+  wayland_1_9 = callPackage ../development/libraries/wayland/1.9.nix { };
 
   wayland-protocols = callPackage ../development/libraries/wayland/protocols.nix { };
 
@@ -12560,7 +12551,7 @@ with pkgs;
     openblas = openblasCompat;
     withRecommendedPackages = false;
     inherit (darwin.apple_sdk.frameworks) Cocoa Foundation;
-    inherit (darwin) cf-private libobjc;
+    inherit (darwin) libobjc;
   };
 
   rWrapper = callPackage ../development/r-modules/wrapper.nix {
@@ -12677,7 +12668,6 @@ with pkgs;
 
   couchdb = callPackage ../servers/http/couchdb {
     spidermonkey = spidermonkey_1_8_5;
-    python = python27;
     sphinx = python27Packages.sphinx;
     erlang = erlangR19;
   };
@@ -15751,7 +15741,7 @@ with pkgs;
     imagemagick = null;
     acl = null;
     gpm = null;
-    inherit (darwin.apple_sdk.frameworks) AppKit CoreWLAN GSS Kerberos ImageIO;
+    inherit (darwin.apple_sdk.frameworks) AppKit GSS ImageIO;
   };
 
   emacs26-nox = lowPrio (appendToName "nox" (emacs26.override {
@@ -15769,7 +15759,7 @@ with pkgs;
     imagemagick = null;
     acl = null;
     gpm = null;
-    inherit (darwin.apple_sdk.frameworks) AppKit CoreWLAN GSS Kerberos ImageIO;
+    inherit (darwin.apple_sdk.frameworks) AppKit GSS ImageIO;
   };
 
   emacs25-nox = lowPrio (appendToName "nox" (emacs25.override {
@@ -16369,9 +16359,7 @@ with pkgs;
     python = python27;
   };
 
-  git-review = callPackage ../applications/version-management/git-review {
-    python = python27;
-  };
+  git-review = callPackage ../applications/version-management/git-review { };
 
   gitolite = callPackage ../applications/version-management/gitolite { };
 
@@ -16414,7 +16402,6 @@ with pkgs;
 
   jetbrains = (recurseIntoAttrs (callPackages ../applications/editors/jetbrains {
     jdk = jetbrains.jdk;
-    androidsdk = androidsdk_extras;
   }) // {
     jdk = callPackage ../development/compilers/jetbrains-jdk {  };
   });
@@ -16869,9 +16856,7 @@ with pkgs;
     let
       mkApplications = import ../applications/kde;
       attrs = {
-        inherit stdenv lib libsForQt5 fetchurl recurseIntoAttrs;
-        inherit plasma5;
-        inherit attica phonon;
+        inherit lib libsForQt5 fetchurl;
         inherit okteta;
       };
     in
@@ -17183,7 +17168,6 @@ with pkgs;
 
   mercurial = callPackage ../applications/version-management/mercurial {
     inherit (darwin.apple_sdk.frameworks) ApplicationServices;
-    inherit (darwin) cf-private;
     guiSupport = false; # use mercurialFull to get hgk GUI
   };
 
@@ -17502,7 +17486,6 @@ with pkgs;
   };
 
   synfigstudio = callPackage ../applications/graphics/synfigstudio {
-    fontsConf = makeFontsConf { fontDirectories = [ freefont_ttf ]; };
     inherit (gnome3) defaultIconTheme;
     mlt-qt5 = libsForQt5.mlt;
   };
@@ -18816,9 +18799,6 @@ with pkgs;
     nvidia_x11_i686 = if system == "x86_64-linux"
       then pkgsi686Linux.linuxPackages.nvidia_x11.override { libsOnly = true; }
       else null;
-    primusLib_i686 = if system == "x86_64-linux"
-      then pkgsi686Linux.primusLib
-      else null;
     libglvnd_i686 = if system == "x86_64-linux"
       then pkgsi686Linux.libglvnd
       else null;
@@ -19234,7 +19214,7 @@ with pkgs;
 
   libxpdf = callPackage ../applications/misc/xpdf/libxpdf.nix { };
 
-  xpra = callPackage ../tools/X11/xpra { inherit (texFunctions) fontsConf; };
+  xpra = callPackage ../tools/X11/xpra { };
   libfakeXinerama = callPackage ../tools/X11/xpra/libfakeXinerama.nix { };
   #TODO: 'pil' is not available for python3, yet
   xpraGtk3 = callPackage ../tools/X11/xpra/gtk3.nix { inherit (texFunctions) fontsConf; inherit (python3Packages) buildPythonApplication python cython pygobject3 pycairo; };
@@ -19268,7 +19248,6 @@ with pkgs;
   finalterm = callPackage ../applications/misc/finalterm { };
 
   roxterm = callPackage ../applications/misc/roxterm {
-    inherit (pythonPackages) lockfile;
     inherit (gnome3) gsettings-desktop-schemas vte;
   };
 
@@ -20176,7 +20155,7 @@ with pkgs;
   lumina = libsForQt5.callPackage ../desktops/lumina { };
 
   lxqt = recurseIntoAttrs (import ../desktops/lxqt {
-    inherit pkgs libsForQt5 fetchFromGitHub;
+    inherit pkgs libsForQt5;
     inherit (lib) makeScope;
   });
 
@@ -21245,7 +21224,7 @@ with pkgs;
   kops = callPackage ../applications/networking/cluster/kops { };
 
   lilypond = callPackage ../misc/lilypond { guile = guile_1_8; };
-  lilypond-unstable = callPackage ../misc/lilypond/unstable.nix { guile = guile_1_8; };
+  lilypond-unstable = callPackage ../misc/lilypond/unstable.nix { };
   lilypond-with-fonts = callPackage ../misc/lilypond/with-fonts.nix {
     lilypond = lilypond-unstable;
   };
@@ -21684,7 +21663,6 @@ with pkgs;
   };
 
   vice = callPackage ../misc/emulators/vice {
-    libX11 = xorg.libX11;
     giflib = giflib_4_1;
   };
 
diff --git a/pkgs/top-level/beam-packages.nix b/pkgs/top-level/beam-packages.nix
index 8f8caf755edf..3440bfafb110 100644
--- a/pkgs/top-level/beam-packages.nix
+++ b/pkgs/top-level/beam-packages.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv, callPackage, wxGTK30, darwin }:
+{ callPackage, wxGTK30 }:
 
 rec {
   lib = callPackage ../development/beam-modules/lib.nix {};
diff --git a/pkgs/top-level/dotnet-packages.nix b/pkgs/top-level/dotnet-packages.nix
index 4527451d71a4..3782fc33d6a6 100644
--- a/pkgs/top-level/dotnet-packages.nix
+++ b/pkgs/top-level/dotnet-packages.nix
@@ -6,7 +6,6 @@
 , fetchNuGet
 , pkgconfig
 , mono
-, monodevelop
 , fsharp
 , unzip
 , overrides ? {}
diff --git a/pkgs/top-level/emacs-packages.nix b/pkgs/top-level/emacs-packages.nix
index f6c992d5bd5f..f1b0aa997ece 100644
--- a/pkgs/top-level/emacs-packages.nix
+++ b/pkgs/top-level/emacs-packages.nix
@@ -50,16 +50,14 @@ let
   };
 
   melpaStablePackages = import ../applications/editors/emacs-modes/melpa-stable-packages.nix {
-    inherit external lib;
+    inherit external;
   };
 
   melpaPackages = import ../applications/editors/emacs-modes/melpa-packages.nix {
     inherit external lib;
   };
 
-  orgPackages = import ../applications/editors/emacs-modes/org-packages.nix {
-    inherit fetchurl lib stdenv texinfo;
-  };
+  orgPackages = import ../applications/editors/emacs-modes/org-packages.nix { };
 
   emacsWithPackages = import ../build-support/emacs/wrapper.nix {
     inherit lib lndir makeWrapper stdenv runCommand;
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 5fef4872db21..bef3c2d0a219 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1,5 +1,5 @@
 { buildPackages, pkgs
-, newScope, stdenv
+, newScope
 , buildPlatform, targetPlatform
 }:
 
diff --git a/pkgs/top-level/haxe-packages.nix b/pkgs/top-level/haxe-packages.nix
index 3ac8d5f164d5..35b0b42da3fe 100644
--- a/pkgs/top-level/haxe-packages.nix
+++ b/pkgs/top-level/haxe-packages.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchzip, fetchFromGitHub, newScope, haxe, neko, nodejs, wine, php, python3, jdk, mono, haskellPackages, fetchpatch }:
+{ stdenv, fetchzip, fetchFromGitHub, haxe, neko, jdk, mono }:
 
 let
   self = haxePackages;
diff --git a/pkgs/top-level/java-packages.nix b/pkgs/top-level/java-packages.nix
index 77cd5b0eba53..73ed6bf9162c 100644
--- a/pkgs/top-level/java-packages.nix
+++ b/pkgs/top-level/java-packages.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv, maven }:
+{ pkgs }:
 
 with pkgs;
 
diff --git a/pkgs/top-level/lua-packages.nix b/pkgs/top-level/lua-packages.nix
index 520db16d3661..cb9df4382463 100644
--- a/pkgs/top-level/lua-packages.nix
+++ b/pkgs/top-level/lua-packages.nix
@@ -5,9 +5,9 @@
    for each package in a separate file: the call to the function would
    be almost as must code as the function itself. */
 
-{ fetchurl, fetchzip, stdenv, lua, callPackage, unzip, zziplib, pkgconfig, libtool
-, pcre, oniguruma, gnulib, tre, glibc, sqlite, openssl, expat, cairo
-, perl, gtk2, python, glib, gobjectIntrospection, libevent, zlib, autoreconfHook
+{ fetchurl, stdenv, lua, callPackage, unzip, zziplib, pkgconfig
+, pcre, oniguruma, gnulib, tre, glibc, sqlite, openssl, expat
+, glib, gobjectIntrospection, libevent, zlib, autoreconfHook
 , mysql, postgresql, cyrus_sasl
 , fetchFromGitHub, libmpack, which, fetchpatch, writeText
 }:
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index a49d638dc47e..eb76c323dde4 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -748,14 +748,14 @@ let
     # Jane Street
 
     janePackage = callPackage ../development/ocaml-modules/janestreet/janePackage.nix {};
-    
+
     janeStreet = import ../development/ocaml-modules/janestreet {
-      inherit lib janePackage ocaml ocamlbuild angstrom ctypes cryptokit;
+      inherit janePackage ocamlbuild angstrom ctypes cryptokit;
       inherit magic-mime num ocaml-migrate-parsetree octavius ounit;
       inherit ppx_deriving re zarith ppxlib;
       inherit (pkgs) stdenv openssl;
     };
-    
+
     janeStreet_0_9_0 = import ../development/ocaml-modules/janestreet/old.nix {
       janePackage = callPackage ../development/ocaml-modules/janestreet/janePackage.nix { defaultVersion = "0.9.0"; };
       inherit lib ocaml ocamlbuild ctypes cryptokit;
diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index b5df07148d94..255ea6d4ffda 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -5,7 +5,7 @@
    for each package in a separate file: the call to the function would
    be almost as much code as the function itself. */
 
-{config, pkgs, fetchurl, fetchFromGitHub, stdenv, fetchsvn, gnused, perl, overrides}:
+{config, pkgs, fetchurl, fetchFromGitHub, stdenv, gnused, perl, overrides}:
 
 let self = _self // overrides; _self = with self; {
 
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 81d38de4f388..d1c0ac374896 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -9650,7 +9650,7 @@ in {
   fixtures = callPackage ../development/python-modules/fixtures { };
 
   pelican = callPackage ../development/python-modules/pelican {
-    inherit (pkgs) glibcLocales pandoc git;
+    inherit (pkgs) glibcLocales git;
   };
 
   pep8 = buildPythonPackage rec {
diff --git a/pkgs/top-level/release-python.nix b/pkgs/top-level/release-python.nix
index 3bc252e440f7..8b7240e21a33 100644
--- a/pkgs/top-level/release-python.nix
+++ b/pkgs/top-level/release-python.nix
@@ -3,9 +3,7 @@
    $ hydra-eval-jobs pkgs/top-level/release-python.nix
 */
 
-{ nixpkgs ? { outPath = (import ../../lib).cleanSource ../..; revCount = 1234; shortRev = "abcdef"; }
-, officialRelease ? false
-, # The platforms for which we build Nixpkgs.
+{ # The platforms for which we build Nixpkgs.
   supportedSystems ? [ "x86_64-linux" ]
 }:
 
diff --git a/pkgs/top-level/unix-tools.nix b/pkgs/top-level/unix-tools.nix
index cc6a8e0592a8..1dface338a39 100644
--- a/pkgs/top-level/unix-tools.nix
+++ b/pkgs/top-level/unix-tools.nix
@@ -1,5 +1,4 @@
-{ pkgs, buildEnv, runCommand, hostPlatform, lib
-, stdenv }:
+{ pkgs, buildEnv, runCommand, hostPlatform, lib }:
 
 # These are some unix tools that are commonly included in the /usr/bin
 # and /usr/sbin directory under more normal distributions. Along with