diff --git a/pkgs/applications/networking/browsers/firefox/wrapper.nix b/pkgs/applications/networking/browsers/firefox/wrapper.nix
index 674ca3c86c9f..f9b7f2bb8a2e 100644
--- a/pkgs/applications/networking/browsers/firefox/wrapper.nix
+++ b/pkgs/applications/networking/browsers/firefox/wrapper.nix
@@ -1,6 +1,5 @@
-{ stdenv, lib, makeDesktopItem, makeWrapper, lndir, config,
-
-replace, fetchurl, zip, unzip, jq
+{ stdenv, lib, makeDesktopItem, makeWrapper, lndir, config
+, replace, fetchurl, zip, unzip, jq
 
 ## various stuff that can be plugged in
 , flashplayer, hal-flash
diff --git a/pkgs/build-support/fetchfirefoxaddon/default.nix b/pkgs/build-support/fetchfirefoxaddon/default.nix
index c232e4cdacee..3426743b2cf1 100644
--- a/pkgs/build-support/fetchfirefoxaddon/default.nix
+++ b/pkgs/build-support/fetchfirefoxaddon/default.nix
@@ -1,16 +1,11 @@
 {stdenv, lib, coreutils, unzip, jq, zip, fetchurl,writeScript,  ...}:
-let
-
-in
-  {
-  name
+{ name
 , url
 , md5 ? ""
 , sha1 ? ""
 , sha256 ? ""
 , sha512 ? ""
 }:
-
 stdenv.mkDerivation rec {
 
   inherit name;