diff --git a/pkgs/applications/audio/cantata/default.nix b/pkgs/applications/audio/cantata/default.nix
index aade5636c168..10baf254dc73 100644
--- a/pkgs/applications/audio/cantata/default.nix
+++ b/pkgs/applications/audio/cantata/default.nix
@@ -92,8 +92,8 @@ stdenv.mkDerivation rec {
   ];
 
   meta = with stdenv.lib; {
-    homepage = "http://code.google.com/p/cantata/";
-    description = "A graphical client for MPD.";
+    homepage = http://code.google.com/p/cantata/;
+    description = "A graphical client for MPD";
     license = licenses.gpl3;
 
     # Technically Cantata can run on Windows so if someone wants to
diff --git a/pkgs/applications/audio/milkytracker/default.nix b/pkgs/applications/audio/milkytracker/default.nix
index eadbaabcf560..d5d7ea7be76a 100644
--- a/pkgs/applications/audio/milkytracker/default.nix
+++ b/pkgs/applications/audio/milkytracker/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ SDL alsaLib autoconf automake jack2 perl zlib zziplib ];
 
   meta = {
-    description = "Music tracker application, similar to Fasttracker II.";
+    description = "Music tracker application, similar to Fasttracker II";
     homepage = http://milkytracker.org;
     license = stdenv.lib.licenses.gpl3Plus;
     platforms = [ "x86_64-linux" "i686-linux" ];
diff --git a/pkgs/applications/audio/mopidy-spotify/default.nix b/pkgs/applications/audio/mopidy-spotify/default.nix
index 6223ffb0d81f..b16e63dc421b 100644
--- a/pkgs/applications/audio/mopidy-spotify/default.nix
+++ b/pkgs/applications/audio/mopidy-spotify/default.nix
@@ -16,7 +16,7 @@ pythonPackages.buildPythonPackage rec {
 
   meta = with stdenv.lib; {
     homepage = http://www.mopidy.com/;
-    description = "Mopidy extension for playing music from Spotify.";
+    description = "Mopidy extension for playing music from Spotify";
     license = licenses.asl20;
     maintainers = [ maintainers.rickynils ];
     hydraPlatforms = [];
diff --git a/pkgs/applications/audio/mopidy/default.nix b/pkgs/applications/audio/mopidy/default.nix
index a0a3af0e9585..b261508438f0 100644
--- a/pkgs/applications/audio/mopidy/default.nix
+++ b/pkgs/applications/audio/mopidy/default.nix
@@ -28,7 +28,7 @@ pythonPackages.buildPythonPackage rec {
     homepage = http://www.mopidy.com/;
     description = ''
       An extensible music server that plays music from local disk, Spotify,
-      SoundCloud, Google Play Music, and more.
+      SoundCloud, Google Play Music, and more
     '';
     license = licenses.asl20;
     maintainers = [ maintainers.rickynils ];
diff --git a/pkgs/applications/audio/vimpc/default.nix b/pkgs/applications/audio/vimpc/default.nix
index 717262dbcb57..71a07f18e084 100755
--- a/pkgs/applications/audio/vimpc/default.nix
+++ b/pkgs/applications/audio/vimpc/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    description = "A vi/vim inspired client for the Music Player Daemon (mpd).";
+    description = "A vi/vim inspired client for the Music Player Daemon (mpd)";
     homepage = https://github.com/boysetsfrog/vimpc;
     license = stdenv.lib.licenses.gpl3;
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/editors/emacs-modes/darcsum/default.nix b/pkgs/applications/editors/emacs-modes/darcsum/default.nix
index 349146dbdd89..0a1c2c77b2a2 100644
--- a/pkgs/applications/editors/emacs-modes/darcsum/default.nix
+++ b/pkgs/applications/editors/emacs-modes/darcsum/default.nix
@@ -26,8 +26,8 @@ stdenv.mkDerivation {
   '';
 
   meta = {
-    description = "A pcl-cvs like interface for managing darcs patches.";
-    homepage = "http://hub.darcs.net/simon/darcsum";
+    description = "A pcl-cvs like interface for managing darcs patches";
+    homepage = http://hub.darcs.net/simon/darcsum;
     license = stdenv.lib.licenses.gpl2Plus;
     maintainers = [ stdenv.lib.maintainers.falsifian ];
   };
diff --git a/pkgs/applications/graphics/solvespace/default.nix b/pkgs/applications/graphics/solvespace/default.nix
index 95230291fe95..cba69c476b54 100644
--- a/pkgs/applications/graphics/solvespace/default.nix
+++ b/pkgs/applications/graphics/solvespace/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation {
   '';
 
   meta = {
-    description = "A parametric 3d CAD program.";
+    description = "A parametric 3d CAD program";
     license = stdenv.lib.licenses.gpl3;
     maintainers = with stdenv.lib.maintainers; [ the-kenny ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/misc/bitcoin/altcoins.nix b/pkgs/applications/misc/bitcoin/altcoins.nix
index 2643094e2f16..931dfcaa8611 100644
--- a/pkgs/applications/misc/bitcoin/altcoins.nix
+++ b/pkgs/applications/misc/bitcoin/altcoins.nix
@@ -45,7 +45,7 @@ in rec {
     };
 
     meta = {
-      description = "Litecoin is a lite version of Bitcoin using scrypt as a proof-of-work algorithm.";
+      description = "A lite version of Bitcoin using scrypt as a proof-of-work algorithm";
       longDescription= ''
         Litecoin is a peer-to-peer Internet currency that enables instant payments
         to anyone in the world. It is based on the Bitcoin protocol but differs
@@ -75,7 +75,7 @@ in rec {
     extraBuildInputs = [ glib ];
 
     meta = {
-      description = "Namecoin is a decentralized key/value registration and transfer system based on Bitcoin technology.";
+      description = "A decentralized key/value registration and transfer system based on Bitcoin technology";
       homepage = http://namecoin.info;
     };
   };
diff --git a/pkgs/applications/misc/k2pdfopt/default.nix b/pkgs/applications/misc/k2pdfopt/default.nix
index 34bef86f4380..2ae5a7ac8efa 100644
--- a/pkgs/applications/misc/k2pdfopt/default.nix
+++ b/pkgs/applications/misc/k2pdfopt/default.nix
@@ -100,7 +100,7 @@ in stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    description = "K2pdfopt optimizes PDF/DJVU files for mobile e-readers (e.g. the Kindle) and smartphones.";
+    description = "Optimizes PDF/DJVU files for mobile e-readers (e.g. the Kindle) and smartphones";
     homepage = http://www.willus.com/k2pdfopt;
     license = licenses.gpl3;
     platforms = platforms.linux;
diff --git a/pkgs/applications/misc/spacefm/default.nix b/pkgs/applications/misc/spacefm/default.nix
index 6f1ced9097e9..b88e4c567cc1 100644
--- a/pkgs/applications/misc/spacefm/default.nix
+++ b/pkgs/applications/misc/spacefm/default.nix
@@ -21,7 +21,7 @@ in stdenv.mkDerivation rec {
   '';
 
   meta = {
-    description = "Multi-panel tabbed file and desktop manager for Linux with built-in VFS, udev- or HAL-based device manager, customizable menu system, and bash integration.";
+    description = "Multi-panel tabbed file and desktop manager for Linux with built-in VFS, udev- or HAL-based device manager, customizable menu system, and bash integration";
     platforms = pkgs.lib.platforms.linux;
     license = pkgs.lib.licenses.gpl3;
   };
diff --git a/pkgs/data/fonts/kochi-substitute-naga10/default.nix b/pkgs/data/fonts/kochi-substitute-naga10/default.nix
index 98ab8a3bcac5..ea2c15752d7f 100644
--- a/pkgs/data/fonts/kochi-substitute-naga10/default.nix
+++ b/pkgs/data/fonts/kochi-substitute-naga10/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
   '';
 
   meta = {
-    description = "Japanese font, non-free replacement for MS Gothic and MS Mincho.";
+    description = "Japanese font, non-free replacement for MS Gothic and MS Mincho";
     longDescription = ''
       Kochi Gothic and Kochi Mincho were developed as free replacements for the
       MS Gothic and MS Mincho fonts from Microsoft. This version of the fonts
diff --git a/pkgs/data/fonts/kochi-substitute/default.nix b/pkgs/data/fonts/kochi-substitute/default.nix
index dec20fd51000..574bc7f29218 100644
--- a/pkgs/data/fonts/kochi-substitute/default.nix
+++ b/pkgs/data/fonts/kochi-substitute/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation {
   '';
 
   meta = {
-    description = "Japanese font, a free replacement for MS Gothic and MS Mincho.";
+    description = "Japanese font, a free replacement for MS Gothic and MS Mincho";
     longDescription = ''
       Kochi Gothic and Kochi Mincho were developed as free replacements for the
       MS Gothic and MS Mincho fonts from Microsoft. These are the Debian
diff --git a/pkgs/data/fonts/poly/default.nix b/pkgs/data/fonts/poly/default.nix
index 63006fdd4f8a..1bd0d8980677 100644
--- a/pkgs/data/fonts/poly/default.nix
+++ b/pkgs/data/fonts/poly/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    description = "Medium contrast serif font.";
+    description = "Medium contrast serif font";
     longDescription = ''
     With short ascenders and a very high x-height, Poly is efficient in small
     sizes. Thanks to its careful balance between the x-height and glyph widths,
diff --git a/pkgs/desktops/gnome-3/3.12/core/yelp/default.nix b/pkgs/desktops/gnome-3/3.12/core/yelp/default.nix
index d8897e262d59..d7f9fe1ff532 100644
--- a/pkgs/desktops/gnome-3/3.12/core/yelp/default.nix
+++ b/pkgs/desktops/gnome-3/3.12/core/yelp/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     homepage = https://wiki.gnome.org/Apps/Yelp;
-    description = "Yelp is the help viewer in Gnome.";
+    description = "The help viewer in Gnome";
     maintainers = with maintainers; [ lethalman ];
     license = licenses.gpl2;
     platforms = platforms.linux;
diff --git a/pkgs/development/compilers/agda/stdlib.nix b/pkgs/development/compilers/agda/stdlib.nix
index 638b45951c89..a583ff33cb68 100644
--- a/pkgs/development/compilers/agda/stdlib.nix
+++ b/pkgs/development/compilers/agda/stdlib.nix
@@ -18,7 +18,7 @@ agda.mkDerivation (self: rec {
 
   meta = with stdenv.lib; {
     homepage = "http://wiki.portal.chalmers.se/agda/pmwiki.php?n=Libraries.StandardLibrary";
-    description = "A standard library for use with the Agda compiler.";
+    description = "A standard library for use with the Agda compiler";
     license = stdenv.lib.licenses.mit;
     platforms = stdenv.lib.platforms.unix;
     maintainers = with maintainers; [ jwiegley fuuzetsu ];
diff --git a/pkgs/development/compilers/opendylan/bin.nix b/pkgs/development/compilers/opendylan/bin.nix
index 19f8eab482cb..4f0a1bd05129 100644
--- a/pkgs/development/compilers/opendylan/bin.nix
+++ b/pkgs/development/compilers/opendylan/bin.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation {
 
   meta = {
     homepage = http://opendylan.org;
-    description = "Dylan is a multi-paradigm functional and object-oriented programming language.";
+    description = "A multi-paradigm functional and object-oriented programming language";
     license = stdenv.lib.licenses.mit;
   };
 }
diff --git a/pkgs/development/compilers/opendylan/default.nix b/pkgs/development/compilers/opendylan/default.nix
index e4bdcf7889bb..66e62f8965e6 100644
--- a/pkgs/development/compilers/opendylan/default.nix
+++ b/pkgs/development/compilers/opendylan/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation {
 
   meta = {
     homepage = http://opendylan.org;
-    description = "Dylan is a multi-paradigm functional and object-oriented programming language.";
+    description = "A multi-paradigm functional and object-oriented programming language";
     license = stdenv.lib.licenses.mit;
   };
 }
diff --git a/pkgs/development/libraries/dlib/default.nix b/pkgs/development/libraries/dlib/default.nix
index 94f74e516f1b..0d262fb061e2 100644
--- a/pkgs/development/libraries/dlib/default.nix
+++ b/pkgs/development/libraries/dlib/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
   propagatedBuildInputs = [ x11 ];
 
   meta = with stdenv.lib; {
-    description = "Dlib is a general purpose cross-platform C++ machine learning library.";
+    description = "A general purpose cross-platform C++ machine learning library";
     homepage = http://www.dlib.net;
     license = stdenv.lib.licenses.boost;
     maintainers = with maintainers; [ christopherpoole ];
diff --git a/pkgs/development/libraries/gdcm/default.nix b/pkgs/development/libraries/gdcm/default.nix
index e100b82ae9ed..4663f7aac224 100644
--- a/pkgs/development/libraries/gdcm/default.nix
+++ b/pkgs/development/libraries/gdcm/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   propagatedBuildInputs = [ ];
 
   meta = {
-    description = "The grassroots cross-platform DICOM implementation.";
+    description = "The grassroots cross-platform DICOM implementation";
     longDescription = ''
       Grassroots DICOM (GDCM) is an implementation of the DICOM standard designed to be open source so that researchers may access clinical data directly.
       GDCM includes a file format definition and a network communications protocol, both of which should be extended to provide a full set of tools for a researcher or small medical imaging vendor to interface with an existing medical database.
diff --git a/pkgs/development/libraries/gtest/default.nix b/pkgs/development/libraries/gtest/default.nix
index 787cd4066c0a..d71c29cbca5d 100644
--- a/pkgs/development/libraries/gtest/default.nix
+++ b/pkgs/development/libraries/gtest/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    description = "Google test: Google's framework for writing C++ tests.";
+    description = "Google's framework for writing C++ tests";
     homepage = https://code.google.com/p/googletest/;
     license = licenses.bsd3;
     platforms = platforms.all;
diff --git a/pkgs/development/libraries/gupnp-av/default.nix b/pkgs/development/libraries/gupnp-av/default.nix
index 3cbb13972d35..2dcd5b11c386 100644
--- a/pkgs/development/libraries/gupnp-av/default.nix
+++ b/pkgs/development/libraries/gupnp-av/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     homepage = http://gupnp.org/;
-    description = "GUPnP-AV is a collection of helpers for building AV (audio/video) applications using GUPnP.";
+    description = "A collection of helpers for building AV (audio/video) applications using GUPnP";
     longDescription = "GUPnP implements the UPnP specification: resource announcement and discovery, description, control, event notification, and presentation (GUPnP includes basic web server functionality through libsoup). GUPnP does not include helpers for construction or control of specific standardized resources (e.g. MediaServer); this is left for higher level libraries utilizing the GUPnP framework.";
     license = stdenv.lib.licenses.gpl2;
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/development/libraries/java/commons/compress/default.nix b/pkgs/development/libraries/java/commons/compress/default.nix
index 2c20d9a9b362..4e04ba47c858 100644
--- a/pkgs/development/libraries/java/commons/compress/default.nix
+++ b/pkgs/development/libraries/java/commons/compress/default.nix
@@ -16,8 +16,8 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    homepage    = "http://commons.apache.org/proper/commons-compress";
-    description = "Allows manipulation of ar, cpio, Unix dump, tar, zip, gzip, XZ, Pack200, bzip2, 7z, arj, lzma, snappy, DEFLATE and Z files.";
+    homepage    = http://commons.apache.org/proper/commons-compress;
+    description = "Allows manipulation of ar, cpio, Unix dump, tar, zip, gzip, XZ, Pack200, bzip2, 7z, arj, lzma, snappy, DEFLATE and Z files";
     maintainers = with stdenv.lib.maintainers; [ copumpkin ];
     license     = stdenv.lib.licenses.asl20;
   };
diff --git a/pkgs/development/libraries/java/commons/fileupload/default.nix b/pkgs/development/libraries/java/commons/fileupload/default.nix
index ebb8a7d7f9db..2018e3f11f2d 100644
--- a/pkgs/development/libraries/java/commons/fileupload/default.nix
+++ b/pkgs/development/libraries/java/commons/fileupload/default.nix
@@ -15,8 +15,8 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    homepage    = "http://commons.apache.org/proper/commons-fileupload";
-    description = "Makes it easy to add robust, high-performance, file upload capability to your servlets and web applications.";
+    homepage    = http://commons.apache.org/proper/commons-fileupload;
+    description = "Makes it easy to add robust, high-performance, file upload capability to your servlets and web applications";
     maintainers = with stdenv.lib.maintainers; [ copumpkin ];
     license     = stdenv.lib.licenses.asl20;
   };
diff --git a/pkgs/development/libraries/libsearpc/default.nix b/pkgs/development/libraries/libsearpc/default.nix
index 32cb7b860c4e..d33ca9a15edd 100644
--- a/pkgs/development/libraries/libsearpc/default.nix
+++ b/pkgs/development/libraries/libsearpc/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec
   meta =
   {
     homepage = "https://github.com/haiwen/libsearpc";
-    description = "A simple and easy-to-use C language RPC framework (including both server side & client side) based on GObject System.";
+    description = "A simple and easy-to-use C language RPC framework (including both server side & client side) based on GObject System";
     license = stdenv.lib.licenses.lgpl3;
     platforms = stdenv.lib.platforms.linux;
     maintainers = [ stdenv.lib.maintainers.calrama ];
diff --git a/pkgs/development/libraries/libzdb/default.nix b/pkgs/development/libraries/libzdb/default.nix
index 90692569f089..a5799f79b56b 100644
--- a/pkgs/development/libraries/libzdb/default.nix
+++ b/pkgs/development/libraries/libzdb/default.nix
@@ -15,8 +15,8 @@ stdenv.mkDerivation rec
 
   meta =
   {
-    homepage = "http://www.tildeslash.com/libzdb/";
-    description = "A small, easy to use Open Source Database Connection Pool Library.";
+    homepage = http://www.tildeslash.com/libzdb/;
+    description = "A small, easy to use Open Source Database Connection Pool Library";
     license = stdenv.lib.licenses.gpl3;
     platforms = stdenv.lib.platforms.linux;
     maintainers = [ stdenv.lib.maintainers.calrama ];
diff --git a/pkgs/development/libraries/skalibs/default.nix b/pkgs/development/libraries/skalibs/default.nix
index 842d74848df6..ba8dcc812e83 100644
--- a/pkgs/development/libraries/skalibs/default.nix
+++ b/pkgs/development/libraries/skalibs/default.nix
@@ -50,7 +50,7 @@ in stdenv.mkDerivation rec {
 
   meta = {
     homepage = http://skarnet.org/software/skalibs/;
-    description = "A set of general-purpose C programming libraries.";
+    description = "A set of general-purpose C programming libraries";
     platforms = stdenv.lib.platforms.all;
     license = stdenv.lib.licenses.isc;
   };
diff --git a/pkgs/development/lisp-modules/lisp-packages.nix b/pkgs/development/lisp-modules/lisp-packages.nix
index 0d9383a465fd..2b4cda88ef81 100644
--- a/pkgs/development/lisp-modules/lisp-packages.nix
+++ b/pkgs/development/lisp-modules/lisp-packages.nix
@@ -48,7 +48,7 @@ let lispPackages = rec {
   alexandria = buildLispPackage rec {
     baseName = "alexandria";
     version = "git-20131029";
-    description = "Alexandria is a collection of portable public domain utilities.";
+    description = "A collection of portable public domain utilities";
     deps = [];
     src = pkgs.fetchgit {
       url = "git://common-lisp.net/projects/alexandria/alexandria.git";
@@ -88,7 +88,7 @@ let lispPackages = rec {
   esrap = buildLispPackage rec {
     baseName = "esrap";
     version = "git-20131029";
-    description = "A Packrat / Parsing Grammar / TDPL parser for Common Lisp.";
+    description = "A Packrat / Parsing Grammar / TDPL parser for Common Lisp";
     deps = [alexandria];
     src = pkgs.fetchgit {
       url = "https://github.com/scymtym/esrap.git";
diff --git a/pkgs/development/tools/golint/default.nix b/pkgs/development/tools/golint/default.nix
index 9e82580018fc..b9292f6fa117 100644
--- a/pkgs/development/tools/golint/default.nix
+++ b/pkgs/development/tools/golint/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    description = "Linter for Go source code.";
+    description = "Linter for Go source code";
     homepage = https://github.com/golang/lint;
     license = licenses.mit;
     maintainers = with maintainers; [ offline ];
diff --git a/pkgs/development/tools/misc/dfu-programmer/default.nix b/pkgs/development/tools/misc/dfu-programmer/default.nix
index 2df687b8bc6b..577bd6f01f56 100644
--- a/pkgs/development/tools/misc/dfu-programmer/default.nix
+++ b/pkgs/development/tools/misc/dfu-programmer/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     license = licenses.gpl2;
-    description = "A Device Firmware Update based USB programmer for Atmel chips with a USB bootloader.";
+    description = "A Device Firmware Update based USB programmer for Atmel chips with a USB bootloader";
     homepage = http://dfu-programmer.sourceforge.net/;
     maintainers = [ maintainers.the-kenny ];
   };
diff --git a/pkgs/development/tools/selenium/server/default.nix b/pkgs/development/tools/selenium/server/default.nix
index ebbcd2c8fd87..0c3331653078 100644
--- a/pkgs/development/tools/selenium/server/default.nix
+++ b/pkgs/development/tools/selenium/server/default.nix
@@ -44,7 +44,7 @@ in stdenv.mkDerivation rec {
 
   meta = {
     homepage = https://code.google.com/p/selenium;
-    description = "Selenium Server for remote WebDriver.";
+    description = "Selenium Server for remote WebDriver";
     maintainers = with maintainers; [ coconnor offline ];
     platforms = platforms.all;
     license = licenses.asl20;
diff --git a/pkgs/development/web/remarkjs/default.nix b/pkgs/development/web/remarkjs/default.nix
index bebf2d80caad..153b165da1e5 100644
--- a/pkgs/development/web/remarkjs/default.nix
+++ b/pkgs/development/web/remarkjs/default.nix
@@ -58,7 +58,7 @@ in stdenv.mkDerivation rec {
 
   meta = {
     homepage = http://remarkjs.com;
-    description = "A simple, in-browser, markdown-driven slideshow tool.";
+    description = "A simple, in-browser, markdown-driven slideshow tool";
     maintainers = [ stdenv.lib.maintainers.rickynils ];
     platforms = stdenv.lib.platforms.linux;
     license = stdenv.lib.licenses.mit;
diff --git a/pkgs/games/astromenace/default.nix b/pkgs/games/astromenace/default.nix
index a2897a795e84..76aed3f2cc6a 100644
--- a/pkgs/games/astromenace/default.nix
+++ b/pkgs/games/astromenace/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    description = "Hardcore 3D space shooter with spaceship upgrade possibilities.";
+    description = "Hardcore 3D space shooter with spaceship upgrade possibilities";
     homepage = http://www.viewizard.com/;
     license = stdenv.lib.licenses.gpl3;
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/games/mnemosyne/default.nix b/pkgs/games/mnemosyne/default.nix
index 1d23640ce8b1..4d4eb7659e19 100644
--- a/pkgs/games/mnemosyne/default.nix
+++ b/pkgs/games/mnemosyne/default.nix
@@ -26,8 +26,8 @@ in buildPythonPackage rec {
   '';
   installCommand = "python setup.py install --prefix=$out";
   meta = {
-    homepage = "http://mnemosyne-proj.org/";
-    description = "Spaced-repetition software.";
+    homepage = http://mnemosyne-proj.org/;
+    description = "Spaced-repetition software";
     longDescription = ''
       The Mnemosyne Project has two aspects:
 
diff --git a/pkgs/games/sdlmame/default.nix b/pkgs/games/sdlmame/default.nix
index acc724490181..8488d357fc5a 100644
--- a/pkgs/games/sdlmame/default.nix
+++ b/pkgs/games/sdlmame/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     homepage    = http://sdlmame.lngn.net;
-    description = "A port of the popular Multiple Arcade Machine Emulator using SDL with OpenGL support.";
+    description = "A port of the popular Multiple Arcade Machine Emulator using SDL with OpenGL support";
     license     = "MAME";
     maintainers = with maintainers; [ lovek323 ];
     platforms   = platforms.linux;
diff --git a/pkgs/games/tcl2048/default.nix b/pkgs/games/tcl2048/default.nix
index 01ffd27d5bb4..fac28ce2fd94 100644
--- a/pkgs/games/tcl2048/default.nix
+++ b/pkgs/games/tcl2048/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation {
 
   meta = {
     homepage = https://github.com/dbohdan/2048-tcl;
-    description = "The game of 2048 implemented in Tcl.";
+    description = "The game of 2048 implemented in Tcl";
     license = stdenv.lib.licenses.mit;
     platforms = stdenv.lib.platforms.all;
   };
diff --git a/pkgs/games/thePenguinMachine/default.nix b/pkgs/games/thePenguinMachine/default.nix
index 04438cf70add..e1a87f225385 100644
--- a/pkgs/games/thePenguinMachine/default.nix
+++ b/pkgs/games/thePenguinMachine/default.nix
@@ -38,8 +38,6 @@ stdenv.mkDerivation {
 		'';
 
   meta = {
-    description = "
-	The Penguin Machine - an Incredible Machine clone.
-";
+    description = "An Incredible Machine clone";
   };
 }
diff --git a/pkgs/games/typespeed/default.nix b/pkgs/games/typespeed/default.nix
index 169c74621d73..4e99eff00651 100644
--- a/pkgs/games/typespeed/default.nix
+++ b/pkgs/games/typespeed/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation {
   configureFlags = "--datadir=\${out}/share/";
 
   meta = {
-    description = "A curses based typing game.";
+    description = "A curses based typing game";
     homepage = http://typespeed.sourceforge.net/;
     license = stdenv.lib.licenses.gpl2;
     maintainers = [ stdenv.lib.maintainers.auntie ];
diff --git a/pkgs/misc/apulse/default.nix b/pkgs/misc/apulse/default.nix
index 9ca2cee47960..9e73afa5922b 100644
--- a/pkgs/misc/apulse/default.nix
+++ b/pkgs/misc/apulse/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
     [ alsaLib cmake pkgconfig glib ];
 
   meta = with stdenv.lib; {
-    description = "PulseAudio emulation for ALSA.";
+    description = "PulseAudio emulation for ALSA";
     homepage = "https://github.com/i-rinat/apulse";
     license = licenses.mit;
     platforms = platforms.linux;
diff --git a/pkgs/misc/drivers/xboxdrv/default.nix b/pkgs/misc/drivers/xboxdrv/default.nix
index 7164f7d6f15f..a40dd0bd31dc 100644
--- a/pkgs/misc/drivers/xboxdrv/default.nix
+++ b/pkgs/misc/drivers/xboxdrv/default.nix
@@ -18,9 +18,8 @@ in stdenv.mkDerivation {
   buildInputs = [ scons libX11 pkgconfig libusb1 boost glib dbus_glib];
 
   meta = with stdenv.lib; {
-    homepage = "http://pingus.seul.org/~grumbel/xboxdrv/";
-    description =
-      "Xbox/Xbox360 (and more) gamepad driver for Linux that works in userspace.";
+    homepage = http://pingus.seul.org/~grumbel/xboxdrv/;
+    description = "Xbox/Xbox360 (and more) gamepad driver for Linux that works in userspace";
     license = licenses.gpl3Plus;
     maintainers = [ maintainers.fuuzetsu ];
   };
diff --git a/pkgs/misc/emulators/ppsspp/default.nix b/pkgs/misc/emulators/ppsspp/default.nix
index 4c49e1e3af2d..732500be0fcf 100644
--- a/pkgs/misc/emulators/ppsspp/default.nix
+++ b/pkgs/misc/emulators/ppsspp/default.nix
@@ -23,7 +23,7 @@ in stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     homepage = "http://www.ppsspp.org/";
-    description = "A PSP emulator, the Qt4 version.";
+    description = "A PSP emulator, the Qt4 version";
     license = licenses.gpl2Plus;
     maintainers = [ maintainers.fuuzetsu ];
     platforms = platforms.linux ++ platforms.darwin ++ platforms.cygwin;
diff --git a/pkgs/os-specific/linux/cpupower/default.nix b/pkgs/os-specific/linux/cpupower/default.nix
index bf6e8c36f3df..269729917dd1 100644
--- a/pkgs/os-specific/linux/cpupower/default.nix
+++ b/pkgs/os-specific/linux/cpupower/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation {
   enableParallelBuilding = true;
 
   meta = with stdenv.lib; {
-    description = "Tool to examine and tune power saving features.";
+    description = "Tool to examine and tune power saving features";
     homepage = https://www.kernel.org.org/;
     license = licenses.gpl2;
     platforms = platforms.linux;
diff --git a/pkgs/os-specific/linux/ktap/default.nix b/pkgs/os-specific/linux/ktap/default.nix
index a82804cb8379..b91fc871350a 100644
--- a/pkgs/os-specific/linux/ktap/default.nix
+++ b/pkgs/os-specific/linux/ktap/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    description = "A lightweight script-based dynamic tracing tool for Linux.";
+    description = "A lightweight script-based dynamic tracing tool for Linux";
     homepage    = "http://www.ktap.org";
     license     = stdenv.lib.licenses.gpl2;
     platforms   = stdenv.lib.platforms.linux;
diff --git a/pkgs/os-specific/linux/s6-linux-utils/default.nix b/pkgs/os-specific/linux/s6-linux-utils/default.nix
index 0f0967079dfb..a50400e492a8 100644
--- a/pkgs/os-specific/linux/s6-linux-utils/default.nix
+++ b/pkgs/os-specific/linux/s6-linux-utils/default.nix
@@ -45,7 +45,7 @@ in stdenv.mkDerivation rec {
 
   meta = {
     homepage = http://www.skarnet.org/software/s6-linux-utils/;
-    description = "A set of minimalistic Linux-specific system utilities.";
+    description = "A set of minimalistic Linux-specific system utilities";
     platforms = stdenv.lib.platforms.linux;
     license = stdenv.lib.licenses.isc;
   };
diff --git a/pkgs/os-specific/linux/usermount/default.nix b/pkgs/os-specific/linux/usermount/default.nix
index 9bf8692d1ce9..6f96445ef5ea 100644
--- a/pkgs/os-specific/linux/usermount/default.nix
+++ b/pkgs/os-specific/linux/usermount/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation {
 
   meta = {
     homepage = https://github.com/tom5760/usermount;
-    description = "A simple tool to automatically mount removable drives using UDisks2 and D-Bus.";
+    description = "A simple tool to automatically mount removable drives using UDisks2 and D-Bus";
     license = stdenv.lib.licenses.mit;
     platforms = stdenv.lib.platforms.linux;
     maintainers = with stdenv.lib.maintainers; [ the-kenny ];
diff --git a/pkgs/servers/beanstalkd/default.nix b/pkgs/servers/beanstalkd/default.nix
index 264e6ff749a5..cea7ca0b337f 100644
--- a/pkgs/servers/beanstalkd/default.nix
+++ b/pkgs/servers/beanstalkd/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     homepage = http://kr.github.io/beanstalkd/;
-    description = "Beanstalk is a simple, fast work queue.";
+    description = "A simple, fast work queue";
     license = licenses.mit;
     maintainers = [ maintainers.zimbatm ];
     platforms = platforms.all;
diff --git a/pkgs/servers/brickd/default.nix b/pkgs/servers/brickd/default.nix
index e88f62a1337d..a99c8c5a6f95 100644
--- a/pkgs/servers/brickd/default.nix
+++ b/pkgs/servers/brickd/default.nix
@@ -52,7 +52,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     homepage = http://www.tinkerforge.com/;
-    description = "The Brick Daemon is a daemon (or service on Windows) that acts as a bridge between the Bricks/Bricklets and the API bindings for the different programming languages.";
+    description = "A daemon (or service on Windows) that acts as a bridge between the Bricks/Bricklets and the API bindings for the different programming languages";
     maintainers = [ stdenv.lib.maintainers.qknight ];
     license = stdenv.lib.licenses.gpl2;
     platforms = stdenv.lib.platforms.all;
diff --git a/pkgs/servers/corosync/default.nix b/pkgs/servers/corosync/default.nix
index cd87e0530554..f4ceca5f386d 100644
--- a/pkgs/servers/corosync/default.nix
+++ b/pkgs/servers/corosync/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     homepage = http://corosync.org/;
-    description = "a Group Communication System with features for implementing high availability within applications.";
+    description = "A Group Communication System with features for implementing high availability within applications";
     license = licenses.bsd3;
     platforms = platforms.unix;
     maintainers = with maintainers; [ wkennington ];
diff --git a/pkgs/servers/http/winstone/default.nix b/pkgs/servers/http/winstone/default.nix
index 8991a220a76d..6a92c0a228af 100644
--- a/pkgs/servers/http/winstone/default.nix
+++ b/pkgs/servers/http/winstone/default.nix
@@ -17,8 +17,8 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    homepage = "http://winstone.sourceforge.net/";
-    description = "A simple Java Servlet container.";
+    homepage = http://winstone.sourceforge.net/;
+    description = "A simple Java Servlet container";
     license = stdenv.lib.licenses.cddl;
     platforms = stdenv.lib.platforms.all;
     maintainers = [ stdenv.lib.maintainers.rickynils ];
diff --git a/pkgs/servers/mail/opensmtpd/default.nix b/pkgs/servers/mail/opensmtpd/default.nix
index 522d0b60f00c..7c442bf8c7ec 100644
--- a/pkgs/servers/mail/opensmtpd/default.nix
+++ b/pkgs/servers/mail/opensmtpd/default.nix
@@ -22,10 +22,10 @@ stdenv.mkDerivation rec {
   ];  
 
   meta = {
-    homepage = "http://www.postfix.org/";
+    homepage = http://www.postfix.org/;
     description = ''
       A free implementation of the server-side SMTP protocol as defined by
-      RFC 5321, with some additional standard extensions.
+      RFC 5321, with some additional standard extensions
     '';
     license = stdenv.lib.licenses.isc;
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/servers/monitoring/riemann/default.nix b/pkgs/servers/monitoring/riemann/default.nix
index 5278e5438133..95b433abbf5c 100644
--- a/pkgs/servers/monitoring/riemann/default.nix
+++ b/pkgs/servers/monitoring/riemann/default.nix
@@ -17,10 +17,8 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = "http://riemann.io/";
-    description = ''
-      A network monitoring system.
-    '';
+    homepage = http://riemann.io/;
+    description = "A network monitoring system";
     license = licenses.epl10;
     platforms = platforms.all;
     maintainers = [ maintainers.rickynils ];
diff --git a/pkgs/servers/nosql/cassandra/default.nix b/pkgs/servers/nosql/cassandra/default.nix
index 1413888f3f1b..fd263cad5d5a 100644
--- a/pkgs/servers/nosql/cassandra/default.nix
+++ b/pkgs/servers/nosql/cassandra/default.nix
@@ -35,8 +35,8 @@ in stdenv.mkDerivation rec {
     '';
 
   meta = {
-    homepage = "http://cassandra.apache.org/";
-    description = "Apache Cassandra™ is a massively scalable open source NoSQL database.";
+    homepage = http://cassandra.apache.org/;
+    description = "A massively scalable open source NoSQL database";
     platforms = stdenv.lib.platforms.all;
     license = stdenv.lib.licenses.asl20;
   };
diff --git a/pkgs/servers/s6/default.nix b/pkgs/servers/s6/default.nix
index 045e31207ba0..039128e9df4c 100644
--- a/pkgs/servers/s6/default.nix
+++ b/pkgs/servers/s6/default.nix
@@ -49,7 +49,7 @@ in stdenv.mkDerivation rec {
 
   meta = {
     homepage = http://www.skarnet.org/software/s6/;
-    description = "skarnet.org's small & secure supervision software suite.";
+    description = "skarnet.org's small & secure supervision software suite";
     platforms = stdenv.lib.platforms.all;
     license = stdenv.lib.licenses.isc;
   };
diff --git a/pkgs/tools/audio/gvolicon/default.nix b/pkgs/tools/audio/gvolicon/default.nix
index 3e97d11fffb0..6bcddfa72f1b 100644
--- a/pkgs/tools/audio/gvolicon/default.nix
+++ b/pkgs/tools/audio/gvolicon/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation {
     '';
 
   meta = {
-    description = "A simple and lightweight volume icon that sits in your system tray.";
+    description = "A simple and lightweight volume icon that sits in your system tray";
     homepage = https://github.com/Unia/gvolicon;
     platforms = stdenv.lib.platforms.linux;
     license = stdenv.lib.licenses.gpl3Plus;
diff --git a/pkgs/tools/audio/mpdcron/default.nix b/pkgs/tools/audio/mpdcron/default.nix
index 6a59fc49a954..c8f485ed5daf 100644
--- a/pkgs/tools/audio/mpdcron/default.nix
+++ b/pkgs/tools/audio/mpdcron/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   };
 
   meta = {
-    description = "A cron like daemon for mpd.";
+    description = "A cron like daemon for mpd";
     homepage    = http://alip.github.io/mpdcron/;
     license     = stdenv.lib.licenses.gpl2;
     platforms   = with stdenv.lib.platforms; unix;
diff --git a/pkgs/tools/audio/volumeicon/default.nix b/pkgs/tools/audio/volumeicon/default.nix
index 0de3af28c19e..92091c18df35 100644
--- a/pkgs/tools/audio/volumeicon/default.nix
+++ b/pkgs/tools/audio/volumeicon/default.nix
@@ -12,8 +12,8 @@ stdenv.mkDerivation rec {
   buildInputs = [ gtk3 pkgconfig intltool alsaLib ];
 
   meta = with stdenv.lib; {
-    description = "A lightweight volume control that sits in your systray.";
-    homepage = "http://softwarebakery.com/maato/volumeicon.html";
+    description = "A lightweight volume control that sits in your systray";
+    homepage = http://softwarebakery.com/maato/volumeicon.html;
     platforms = pkgs.lib.platforms.linux;
     maintainers = with maintainers; [ bobvanderlinden ];
     license = pkgs.lib.licenses.gpl3;
diff --git a/pkgs/tools/filesystems/jmtpfs/default.nix b/pkgs/tools/filesystems/jmtpfs/default.nix
index 5ee793977071..86dad1cc0fa4 100644
--- a/pkgs/tools/filesystems/jmtpfs/default.nix
+++ b/pkgs/tools/filesystems/jmtpfs/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ autoconf automake file fuse libmtp pkgconfig unzip ];
 
   meta = {
-    description = "A FUSE filesystem for MTP devices like Android phones.";
+    description = "A FUSE filesystem for MTP devices like Android phones";
     homepage = https://github.com/JasonFerrara/jmtpfs;
     license = stdenv.lib.licenses.gpl3;
     maintainers = [ stdenv.lib.maintainers.coconnor ];
diff --git a/pkgs/tools/misc/execline/default.nix b/pkgs/tools/misc/execline/default.nix
index ba0784138b31..8462ca0e9c69 100644
--- a/pkgs/tools/misc/execline/default.nix
+++ b/pkgs/tools/misc/execline/default.nix
@@ -46,7 +46,7 @@ in stdenv.mkDerivation rec {
 
   meta = {
     homepage = http://skarnet.org/software/execline/;
-    description = "A small scripting language, to be used in place of a shell in non-interactive scripts.";
+    description = "A small scripting language, to be used in place of a shell in non-interactive scripts";
     platforms = stdenv.lib.platforms.all;
     license = stdenv.lib.licenses.isc;
   };
diff --git a/pkgs/tools/misc/s6-portable-utils/default.nix b/pkgs/tools/misc/s6-portable-utils/default.nix
index f8e7dfaddc9e..8da10b7eb582 100644
--- a/pkgs/tools/misc/s6-portable-utils/default.nix
+++ b/pkgs/tools/misc/s6-portable-utils/default.nix
@@ -47,7 +47,7 @@ in stdenv.mkDerivation rec {
 
   meta = {
     homepage = http://www.skarnet.org/software/s6-portable-utils/;
-    description = "A set of tiny general Unix utilities optimized for simplicity and small size.";
+    description = "A set of tiny general Unix utilities optimized for simplicity and small size";
     platforms = stdenv.lib.platforms.all;
     license = stdenv.lib.licenses.isc;
   };
diff --git a/pkgs/tools/misc/screenfetch/default.nix b/pkgs/tools/misc/screenfetch/default.nix
index 826f4e4d869f..442922b78054 100644
--- a/pkgs/tools/misc/screenfetch/default.nix
+++ b/pkgs/tools/misc/screenfetch/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
   '';
 
   meta = {
-    description = "Fetches system/theme information in terminal for Linux desktop screenshots.";
+    description = "Fetches system/theme information in terminal for Linux desktop screenshots";
     longDescription = ''
     screenFetch is a "Bash Screenshot Information Tool". This handy Bash
     script can be used to generate one of those nifty terminal theme
diff --git a/pkgs/tools/misc/sutils/default.nix b/pkgs/tools/misc/sutils/default.nix
index 53945113e7f2..d0576cc069a7 100644
--- a/pkgs/tools/misc/sutils/default.nix
+++ b/pkgs/tools/misc/sutils/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
    prePatch = ''sed -i "s@/usr/local@$out@" Makefile'';
 
    meta = {
-     description = "Small command-line utilities.";
+     description = "Small command-line utilities";
      homepage = https://github.com/baskerville/sutils;
      maintainers = [ stdenv.lib.maintainers.meisternu ];
      license = "Custom";
diff --git a/pkgs/tools/networking/bully/default.nix b/pkgs/tools/networking/bully/default.nix
index f667d772ac44..6c090a7ec1f6 100644
--- a/pkgs/tools/networking/bully/default.nix
+++ b/pkgs/tools/networking/bully/default.nix
@@ -20,8 +20,8 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    description = "Retrieve WPA/WPA2 passphrase from a WPS enabled access point.";
-    homepage = "https://github.com/bdpurcell/bully";
+    description = "Retrieve WPA/WPA2 passphrase from a WPS enabled access point";
+    homepage = https://github.com/bdpurcell/bully;
     maintainers = [ stdenv.lib.maintainers.edwtjo ];
     license = stdenv.lib.licenses.gpl3;
   };
diff --git a/pkgs/tools/networking/ccnet/default.nix b/pkgs/tools/networking/ccnet/default.nix
index 8896156bd1c5..a967e8b27351 100644
--- a/pkgs/tools/networking/ccnet/default.nix
+++ b/pkgs/tools/networking/ccnet/default.nix
@@ -26,8 +26,8 @@ stdenv.mkDerivation rec
 
   meta =
   {
-    homepage = "https://github.com/haiwen/ccnet";
-    description = "A framework for writing networked applications in C.";
+    homepage = https://github.com/haiwen/ccnet;
+    description = "A framework for writing networked applications in C";
     license = stdenv.lib.licenses.gpl3Plus;
     platforms = stdenv.lib.platforms.linux;
     maintainers = [ stdenv.lib.maintainers.calrama ];
diff --git a/pkgs/tools/networking/ndjbdns/default.nix b/pkgs/tools/networking/ndjbdns/default.nix
index e2dc1fd1eafd..2a7e996f8db2 100644
--- a/pkgs/tools/networking/ndjbdns/default.nix
+++ b/pkgs/tools/networking/ndjbdns/default.nix
@@ -11,7 +11,10 @@ stdenv.mkDerivation rec {
   buildInputs = [ pkgconfig systemd ];
 
   meta = with stdenv.lib; {
-    description = "N-DJBDNS is a brand new release of the Djbdns. Djbdns is a fully‐fledged Domain Name System(DNS), originally written by the eminent author of qmail, Dr. D J Bernstein.";
+    description = "A brand new release of the Djbdns";
+    longDescription = ''
+      Djbdns is a fully‐fledged Domain Name System(DNS), originally written by the eminent author of qmail, Dr. D J Bernstein.
+    '';
     homepage = http://pjp.dgplug.org/ndjbdns/;
     license = licenses.gpl2;
     maintainers = [ maintainers.msackman ];
diff --git a/pkgs/tools/networking/netcat-openbsd/default.nix b/pkgs/tools/networking/netcat-openbsd/default.nix
index 8619eb798479..e71abcd8a2c8 100644
--- a/pkgs/tools/networking/netcat-openbsd/default.nix
+++ b/pkgs/tools/networking/netcat-openbsd/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     homepage = "http://packages.debian.org/netcat-openbsd";
-    description = "TCP/IP swiss army knife. OpenBSD variant.";
+    description = "TCP/IP swiss army knife, OpenBSD variant";
     platforms = stdenv.lib.platforms.linux;
   };
 
diff --git a/pkgs/tools/networking/s6-dns/default.nix b/pkgs/tools/networking/s6-dns/default.nix
index 3165434de3da..881bb7dd32f4 100644
--- a/pkgs/tools/networking/s6-dns/default.nix
+++ b/pkgs/tools/networking/s6-dns/default.nix
@@ -45,7 +45,7 @@ in stdenv.mkDerivation rec {
 
   meta = {
     homepage = http://www.skarnet.org/software/s6-dns/;
-    description = "A suite of DNS client programs and libraries for Unix systems.";
+    description = "A suite of DNS client programs and libraries for Unix systems";
     platforms = stdenv.lib.platforms.all;
     license = stdenv.lib.licenses.isc;
   };
diff --git a/pkgs/tools/networking/s6-networking/default.nix b/pkgs/tools/networking/s6-networking/default.nix
index 3d5e3e048110..5faa2af8ba11 100644
--- a/pkgs/tools/networking/s6-networking/default.nix
+++ b/pkgs/tools/networking/s6-networking/default.nix
@@ -55,7 +55,7 @@ in stdenv.mkDerivation rec {
 
   meta = {
     homepage = http://www.skarnet.org/software/s6-networking/;
-    description = "A suite of small networking utilities for Unix systems.";
+    description = "A suite of small networking utilities for Unix systems";
     platforms = stdenv.lib.platforms.all;
     license = stdenv.lib.licenses.isc;
   };
diff --git a/pkgs/tools/security/nmap/default.nix b/pkgs/tools/security/nmap/default.nix
index 56964c1f6923..61e4989f6cbd 100644
--- a/pkgs/tools/security/nmap/default.nix
+++ b/pkgs/tools/security/nmap/default.nix
@@ -32,8 +32,8 @@ stdenv.mkDerivation rec {
     ];
 
   meta = {
-    description = "A free and open source utility for network discovery and security auditing.";
-    homepage    = "http://www.nmap.org";
+    description = "A free and open source utility for network discovery and security auditing";
+    homepage    = http://www.nmap.org;
     license     = licenses.gpl2;
     platforms   = platforms.linux;
     maintainers = with maintainers; [ mornfall thoughtpolice ];
diff --git a/pkgs/tools/security/tpm-quote-tools/default.nix b/pkgs/tools/security/tpm-quote-tools/default.nix
index c178d401154f..b294c1c9feb8 100644
--- a/pkgs/tools/security/tpm-quote-tools/default.nix
+++ b/pkgs/tools/security/tpm-quote-tools/default.nix
@@ -11,9 +11,12 @@ stdenv.mkDerivation {
   buildInputs = [ trousers openssl ];
 
   meta = with stdenv.lib; {
-    description = ''The TPM Quote Tools is a collection of programs that provide support
-                    for TPM based attestation using the TPM quote mechanism.  The manual
-                    page for tpm_quote_tools provides a usage overview.'';
+    description = "A collection of programs that provide support for TPM based attestation using the TPM quote mechanism";
+    longDescription = ''
+      The TPM Quote Tools is a collection of programs that provide support
+      for TPM based attestation using the TPM quote mechanism.  The manual
+      page for tpm_quote_tools provides a usage overview.
+    '';
     homepage    = http://tpmquotetools.sourceforge.net/;
     license     = licenses.bsd3;
     maintainers = [ maintainers.ak ];
diff --git a/pkgs/tools/system/safe-rm/default.nix b/pkgs/tools/system/safe-rm/default.nix
index 418817332e92..1cd7743e152a 100644
--- a/pkgs/tools/system/safe-rm/default.nix
+++ b/pkgs/tools/system/safe-rm/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    description = "Tool intended to prevent the accidental deletion of important files.";
+    description = "Tool intended to prevent the accidental deletion of important files";
     homepage = https://launchpad.net/safe-rm;
     license = licenses.gpl3;
     platforms = platforms.all;
diff --git a/pkgs/tools/text/numdiff/default.nix b/pkgs/tools/text/numdiff/default.nix
index 9cef82e5e530..db7eeb789afb 100644
--- a/pkgs/tools/text/numdiff/default.nix
+++ b/pkgs/tools/text/numdiff/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation {
     description = ''
       A little program that can be used to compare putatively similar files
       line by line and field by field, ignoring small numeric differences
-      or/and different numeric formats.
+      or/and different numeric formats
     '';
     homepage = http://www.nongnu.org/numdiff/;
     license = stdenv.lib.licenses.gpl3Plus;
diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index 8b0ee4cfa5b5..122cc1a596b8 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -872,7 +872,7 @@ let self = _self // overrides; _self = with self; {
     buildInputs = [ TestDeep TestException ];
     propagatedBuildInputs = [ CatalystRuntime MROCompat TaskWeaken ];
     meta = {
-      description = "Flexible caching support for Catalyst.";
+      description = "Flexible caching support for Catalyst";
       license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
       maintainers = with maintainers; [ ocharles ];
       platforms   = stdenv.lib.platforms.unix;
@@ -1503,7 +1503,7 @@ let self = _self // overrides; _self = with self; {
     };
     propagatedBuildInputs = [ CaptureTiny ];
     meta = {
-      description = "A module to implement some of AutoConf macros in pure perl.";
+      description = "A module to implement some of AutoConf macros in pure perl";
       license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
     };
   };
@@ -2347,7 +2347,7 @@ let self = _self // overrides; _self = with self; {
     };
     propagatedBuildInputs = [ ClassISA DevelStackTrace StringUtil TermReadKey TextTabularDisplay TieIxHash ];
     meta = {
-      description = "Debug::ShowStuff - A collection of handy debugging routines for displaying the values of variables with a minimum of coding.";
+      description = "A collection of handy debugging routines for displaying the values of variables with a minimum of coding";
       license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
     };
   };
@@ -2506,7 +2506,7 @@ let self = _self // overrides; _self = with self; {
     };
     propagatedBuildInputs = [ DBIxClassCandy TestDeep CarpClan DBDSQLite ];
     meta = {
-      description = "Simplify the common case stuff for DBIx::Class.";
+      description = "Simplify the common case stuff for DBIx::Class";
       license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
     };
   };
@@ -2733,7 +2733,7 @@ let self = _self // overrides; _self = with self; {
     };
     propagatedBuildInputs = [ LWP ];
     meta = {
-      description = "Perl extension for getting MD5 sums for files and urls.";
+      description = "Perl extension for getting MD5 sums for files and urls";
       maintainers = with maintainers; [ ocharles ];
       platforms   = stdenv.lib.platforms.unix;
     };
@@ -3459,7 +3459,7 @@ let self = _self // overrides; _self = with self; {
       sha256 = "0j4rhx3w6nbvmxqjg6q09gm10nnpkcmqmh29cgxsfc9k14d8bb6w";
     };
     meta = {
-      description = "A tool to build C libraries.";
+      description = "A tool to build C libraries";
       license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
     };
   };
@@ -7094,7 +7094,7 @@ let self = _self // overrides; _self = with self; {
       sha256 = "0yphqsgg7zrar2ywk2j2fnjxmi9rq32yf0p5ln8m9fmfx4kd84mr";
     };
     meta = {
-      description = "Simple flexible means of converting the output of PHP's serialize() into the equivalent Perl memory structure, and vice versa.";
+      description = "Simple flexible means of converting the output of PHP's serialize() into the equivalent Perl memory structure, and vice versa";
       license = "unknown";
     };
   };
@@ -8052,7 +8052,7 @@ let self = _self // overrides; _self = with self; {
     };
     propagatedBuildInputs = [ SubExporter SubInstall ];
     meta = {
-      description = "A module for when strings are too long to be displayed in..";
+      description = "A module for when strings are too long to be displayed in";
       license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
     };
   };
@@ -9460,7 +9460,7 @@ let self = _self // overrides; _self = with self; {
     buildInputs = [ TestTester ];
     propagatedBuildInputs = [ DataDump ];
     meta = {
-      description = "Trap exit codes, exceptions, output, etc.";
+      description = "Trap exit codes, exceptions, output, etc";
       license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
     };
   };
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 5d2b198cabfb..08cf2770f31e 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -247,7 +247,7 @@ let
 
     meta = {
       homepage = https://github.com/teythoon/afew;
-      description = "afew is an initial tagging script for notmuch mail.";
+      description = "An initial tagging script for notmuch mail";
       maintainers = [ stdenv.lib.maintainers.garbas ];
     };
   };
@@ -266,7 +266,7 @@ let
 
     meta = {
       homepage = http://bitbucket.org/zzzeek/alembic;
-      description = "A database migration tool for SQLAlchemy.";
+      description = "A database migration tool for SQLAlchemy";
       license = stdenv.lib.licenses.mit;
     };
   };
@@ -1271,7 +1271,7 @@ let
 
     meta = with stdenv.lib; {
       homepage = http://certifi.io/;
-      description = "Python package for providing Mozilla's CA Bundle.";
+      description = "Python package for providing Mozilla's CA Bundle";
       license = licenses.isc;
       maintainers = [ maintainers.koral ];
     };
@@ -1358,7 +1358,7 @@ let
     };
     meta = {
       homepage = "http://click.pocoo.org/";
-      description = "Click is a Python package for creating beautiful command line interfaces in a composable way with as little code as necessary.";
+      description = "A Python package for creating beautiful command line interfaces in a composable way with as little code as necessary";
       license = stdenv.lib.licenses.bsd3;
     };
   };
@@ -1505,7 +1505,7 @@ let
     doCheck = false;
 
     meta = {
-      description = "Autogenerate Colander schemas based on SQLAlchemy models.";
+      description = "Autogenerate Colander schemas based on SQLAlchemy models";
       homepage = https://github.com/stefanofontanelli/ColanderAlchemy;
       license = licenses.mit;
     };
@@ -1526,7 +1526,7 @@ let
     propagatedBuildInputs = with self; [ six ];
 
     meta = {
-      description = "Config file reading, writing and validation.";
+      description = "Config file reading, writing and validation";
       homepage = http://pypi.python.org/pypi/configobj;
       license = licenses.bsd3;
       maintainers = [ stdenv.lib.maintainers.garbas ];
@@ -2082,7 +2082,7 @@ let
     doCheck = false;
 
     meta = {
-      description = "A caching front-end based on the Dogpile lock.";
+      description = "A caching front-end based on the Dogpile lock";
       homepage = http://bitbucket.org/zzzeek/dogpile.cache;
       license = licenses.bsd3;
     };
@@ -2296,7 +2296,7 @@ let
     };
 
     meta = with pkgs.stdenv.lib; {
-      description = "Client library that supports the Facebook Graph API and the official Facebook JavaScript SDK.";
+      description = "Client library that supports the Facebook Graph API and the official Facebook JavaScript SDK";
       homepage = https://github.com/pythonforfacebook/facebook-sdk;
       license = licenses.asl20 ;
     };
@@ -2311,7 +2311,7 @@ let
     };
     buildInputs = with self; [ nose ];
     meta = with stdenv.lib; {
-      description = "A Python library for generating fake user data.";
+      description = "A Python library for generating fake user data";
       homepage    = http://pypi.python.org/pypi/Faker;
       license     = licenses.mit;
       maintainers = with maintainers; [ lovek323 ];
@@ -2326,7 +2326,7 @@ let
       sha256 = "0qdmk8p4anrj9mf95dh9v7bkhv1pz69hvhlw380kj4iz7b44b6zn";
     };
     meta = with stdenv.lib; {
-      description = "A Python package that generates fake data for you.";
+      description = "A Python package that generates fake data for you";
       homepage    = https://pypi.python.org/pypi/fake-factory;
       license     = licenses.mit;
       maintainers = with maintainers; [ lovek323 ];
@@ -2481,8 +2481,8 @@ let
     };
 
     meta = with stdenv.lib; {
-      description = "Brings Google services to the command line.";
-      homepage    = "https://code.google.com/p/googlecl/";
+      description = "Brings Google services to the command line";
+      homepage    = https://code.google.com/p/googlecl/;
       license     = licenses.asl20;
       maintainers = with maintainers; [ lovek323 ];
       platforms   = platforms.unix;
@@ -3531,7 +3531,7 @@ let
 
     meta = {
       homepage = http://docutils.sourceforge.net/;
-      description = "Docutils is an open-source text processing system for processing plaintext documentation into useful formats, such as HTML or LaTeX.";
+      description = "An open-source text processing system for processing plaintext documentation into useful formats, such as HTML or LaTeX";
     };
   };
 
@@ -3622,7 +3622,7 @@ let
 
     meta = {
       homepage = http://pypi.python.org/pypi/enum/;
-      description = "Robust enumerated type support in Python.";
+      description = "Robust enumerated type support in Python";
     };
   };
 
@@ -3745,7 +3745,7 @@ let
     #doCheck = false;
 
     meta = {
-      description = "code checking using pep8 and pyflakes.";
+      description = "Code checking using pep8 and pyflakes";
       homepage = http://pypi.python.org/pypi/flake8;
       license = licenses.mit;
       maintainers = [ stdenv.lib.maintainers.garbas ];
@@ -3811,7 +3811,7 @@ let
 
     meta = {
       homepage = http://flexget.com/;
-      description = "Multipurpose automation tool for content like torrents, ...";
+      description = "Multipurpose automation tool for content like torrents";
       license = stdenv.lib.licenses.mit;
       maintainers = [ stdenv.lib.maintainers.iElectric ];
     };
@@ -3963,7 +3963,7 @@ let
     buildInputs = with self; [ pkgs.pkgconfig pkgs.fuse ];
 
     meta = {
-      description = "Python bindings for FUSE.";
+      description = "Python bindings for FUSE";
       license = stdenv.lib.licenses.lgpl21;
     };
   });
@@ -4188,8 +4188,8 @@ let
     '';
 
     meta = with stdenv.lib; {
-      description = "Search your google contacts from the command-line or mutt.";
-      homepage    = "https://pypi.python.org/pypi/goobook";
+      description = "Search your google contacts from the command-line or mutt";
+      homepage    = https://pypi.python.org/pypi/goobook;
       license     = licenses.gpl3;
       maintainers = with maintainers; [ lovek323 ];
       platforms   = platforms.unix;
@@ -4525,7 +4525,7 @@ let
     buildInputs = with self; [ nose ];
 
     meta = {
-      description = "Utilities for manipulating IP addresses including a class that can be used to include CIDR network blocks in Django's INTERNAL_IPS setting.";
+      description = "Utilities for manipulating IP addresses including a class that can be used to include CIDR network blocks in Django's INTERNAL_IPS setting";
       homepage = http://pypi.python.org/pypi/iptools;
     };
   };
@@ -4608,8 +4608,8 @@ let
     };
 
     meta = {
-      homepage = "https://github.com/davidhalter/jedi";
-      description = "An autocompletion tool for Python that can be used for text editors.";
+      homepage = https://github.com/davidhalter/jedi;
+      description = "An autocompletion tool for Python that can be used for text editors";
       license = licenses.lgpl3Plus;
       maintainers = [ stdenv.lib.maintainers.garbas ];
     };
@@ -4936,7 +4936,7 @@ let
     propagatedBuildInputs = with self; [ markupsafe ];
 
     meta = {
-      description = "Super-fast templating language.";
+      description = "Super-fast templating language";
       homepage = http://www.makotemplates.org;
       license = stdenv.lib.licenses.mit;
       maintainers = [ stdenv.lib.maintainers.iElectric ];
@@ -5268,7 +5268,7 @@ let
 
     meta = {
       homepage = http://code.google.com/p/pymox/;
-      description = "A mock object framework for Python.";
+      description = "A mock object framework for Python";
     };
   };
 
@@ -5305,7 +5305,7 @@ let
     };
 
     meta = with pkgs.stdenv.lib; {
-      description = "An MPD (Music Player Daemon) client library written in pure Python.";
+      description = "An MPD (Music Player Daemon) client library written in pure Python";
       homepage = http://jatreuman.indefero.net/p/python-mpd/;
       license = licenses.gpl3;
     };
@@ -5709,7 +5709,7 @@ let
     };
 
     meta = {
-      description = "A python nose plugin to profile using cProfile rather than the default Hotshot profiler.";
+      description = "A python nose plugin to profile using cProfile rather than the default Hotshot profiler";
     };
 
     buildInputs = with self; [ nose ];
@@ -6266,8 +6266,8 @@ let
     doCheck = false;
 
     meta = {
-      homepage = "http://www.noah.org/wiki/Pexpect";
-      description = "Automate interactive console applications such as ssh, ftp, etc.";
+      homepage = http://www.noah.org/wiki/Pexpect;
+      description = "Automate interactive console applications such as ssh, ftp, etc";
       license = stdenv.lib.licenses.mit;
 
       longDescription = ''
@@ -6475,7 +6475,7 @@ let
 
     meta = with stdenv.lib; {
       homepage    = https://github.com/Lokaltog/powerline;
-      description = "The ultimate statusline/prompt utility.";
+      description = "The ultimate statusline/prompt utility";
       license     = licenses.mit;
       maintainers = with maintainers; [ lovek323 ];
       platforms   = platforms.all;
@@ -6511,7 +6511,7 @@ let
 
 
     meta = {
-      description = "Protocol Buffers are Google's data interchange format.";
+      description = "Protocol Buffers are Google's data interchange format";
       homepage = http://code.google.com/p/protobuf/;
     };
   };
@@ -6650,7 +6650,7 @@ let
 
     meta = {
       homepage = https://pypi.python.org/pypi/pygit2;
-      description = "Pygit2 is a set of Python bindings to the libgit2 shared library.";
+      description = "A set of Python bindings to the libgit2 shared library";
       license = with stdenv.lib.licenses; gpl2;
       platforms = with stdenv.lib.platforms; all;
     };
@@ -6669,7 +6669,7 @@ let
 
     meta = {
       homepage = http://babel.edgewall.org;
-      description = "A collection of tools for internationalizing Python applications.";
+      description = "A collection of tools for internationalizing Python applications";
       license = "BSD";
       maintainers = [ stdenv.lib.maintainers.garbas ];
       platforms = stdenv.lib.platforms.linux;
@@ -6890,7 +6890,7 @@ let
     propagatedBuildInputs = with self; [pyparsing pkgs.graphviz];
     meta = {
       homepage = http://code.google.com/p/pydot/;
-      description = "pydot allows to easily create both directed and non directed graphs from Python.";
+      description = "Allows to easily create both directed and non directed graphs from Python";
     };
   };
 
@@ -6943,8 +6943,8 @@ let
     doCheck = !isPyPy;
 
     meta = {
-      homepage = "https://launchpad.net/pyflakes";
-      description = "A simple program which checks Python source files for errors.";
+      homepage = https://launchpad.net/pyflakes;
+      description = "A simple program which checks Python source files for errors";
       license = licenses.mit;
       maintainers = [ stdenv.lib.maintainers.garbas ];
     };
@@ -7397,7 +7397,7 @@ let
     buildInputs = with self; [ pkgs.acl ];
 
     meta = {
-      description = "A Python extension module for POSIX ACLs. It can be used to query, list, add, and remove ACLs from files and directories under operating systems that support them.";
+      description = "A Python extension module for POSIX ACLs, it can be used to query, list, add, and remove ACLs from files and directories under operating systems that support them";
       license = stdenv.lib.licenses.lgpl21Plus;
     };
   });
@@ -7508,7 +7508,7 @@ let
     meta = {
       homepage = http://pypi.python.org/pypi/pyreport;
       license = "BSD";
-      description = "Pyreport makes notes out of a python script.";
+      description = "Pyreport makes notes out of a python script";
     };
   });
 
@@ -7729,7 +7729,7 @@ let
     buildInputs = with self; [ pkgs.attr ];
 
     meta = {
-      description = "A Python extension module which gives access to the extended attributes for filesystem objects available in some operating systems.";
+      description = "A Python extension module which gives access to the extended attributes for filesystem objects available in some operating systems";
       license = stdenv.lib.licenses.lgpl21Plus;
     };
   });
@@ -7785,7 +7785,7 @@ let
     doCheck = false;
 
     meta = {
-      description = "The ReportLab Toolkit. An Open Source Python library for generating PDFs and graphics.";
+      description = "An Open Source Python library for generating PDFs and graphics";
       homepage = http://www.reportlab.com/;
     };
   };
@@ -7800,7 +7800,7 @@ let
     };
 
     meta = {
-      description = "Requests is an Apache2 Licensed HTTP library, written in Python, for human beings..";
+      description = "An Apache2 licensed HTTP library, written in Python, for human beings";
       homepage = http://docs.python-requests.org/en/latest/;
     };
   };
@@ -7815,7 +7815,7 @@ let
     };
 
     meta = {
-      description = "Requests is an Apache2 Licensed HTTP library, written in Python, for human beings..";
+      description = "An Apache2 licensed HTTP library, written in Python, for human beings";
       homepage = http://docs.python-requests.org/en/latest/;
     };
   };
@@ -7980,7 +7980,7 @@ let
     propagatedBuildInputs = with self; [ isodate ];
 
     meta = {
-      description = "RDFLib is a Python library for working with RDF, a simple yet powerful language for representing information.";
+      description = "A Python library for working with RDF, a simple yet powerful language for representing information";
       homepage = http://www.rdflib.net/;
     };
   });
@@ -8943,8 +8943,8 @@ let
     '';
 
     meta = {
-      homepage = "https://pypi.python.org/pypi/subprocess32";
-      description = "Backport of the subprocess module from Python 3.2.5 for use on 2.x.";
+      homepage = https://pypi.python.org/pypi/subprocess32;
+      description = "Backport of the subprocess module from Python 3.2.5 for use on 2.x";
       maintainers = [ stdenv.lib.maintainers.garbas ];
     };
   };
@@ -9360,7 +9360,7 @@ let
     doCheck = false;
 
     meta = {
-      description = "A module provides basic functions for parsing mime-type names and matching them against a list of media-ranges.";
+      description = "A module provides basic functions for parsing mime-type names and matching them against a list of media-ranges";
       homepage = https://code.google.com/p/mimeparse/;
       license = licenses.mit;
     };
@@ -9380,7 +9380,7 @@ let
     doCheck = false;
 
     meta = {
-      description = "A module provides basic functions for parsing mime-type names and matching them against a list of media-ranges.";
+      description = "A module provides basic functions for parsing mime-type names and matching them against a list of media-ranges";
       homepage = https://code.google.com/p/mimeparse/;
       license = licenses.mit;
     };
@@ -9396,7 +9396,7 @@ let
     };
 
     meta = {
-      description = "Python implementation of the v3 API for TheMovieDB.org, allowing access to movie and cast information.";
+      description = "Python implementation of the v3 API for TheMovieDB.org, allowing access to movie and cast information";
       homepage = http://pypi.python.org/pypi/tmdb3;
       license = stdenv.lib.licenses.bsd3;
     };
@@ -9486,7 +9486,7 @@ let
     propagatedBuildInputs = with self; [ six ];
 
     meta = {
-      description = "Python implementation of the Transmission bittorent client RPC protocol.";
+      description = "Python implementation of the Transmission bittorent client RPC protocol";
       homepage = http://pypi.python.org/pypi/transmissionrpc/;
       license = stdenv.lib.licenses.mit;
     };
@@ -9528,8 +9528,8 @@ let
     doCheck = false;
 
     meta = {
-      homepage = "https://github.com/alejandrogomez/turses";
-      description = "A Twitter client for the console.";
+      homepage = https://github.com/alejandrogomez/turses;
+      description = "A Twitter client for the console";
       license = licenses.gpl3;
       maintainers = [ stdenv.lib.maintainers.garbas ];
       platforms = stdenv.lib.platforms.linux;
@@ -9621,7 +9621,7 @@ let
      doCheck = false;
 
     meta = with pkgs.stdenv.lib; {
-      description = "Tzinfo object for the local timezone.";
+      description = "Tzinfo object for the local timezone";
       homepage = https://github.com/regebro/tzlocal;
       license = licenses.cddl;
     };
@@ -10794,7 +10794,7 @@ let
 
     meta = {
       homepage = http://liw.fi/cliapp/;
-      description = "Python framework for Unix command line programs.";
+      description = "Python framework for Unix command line programs";
       maintainers = [ stdenv.lib.maintainers.rickynils ];
     };
   };
@@ -10825,7 +10825,7 @@ let
     };
 
     meta = {
-      description = "The TornadoKick Web Toolkit for Tornado Web Framework.";
+      description = "A Toolkit for the Tornado Web Framework";
       homepage = http://github.com/multoncore/tornadokick;
       license = stdenv.lib.licenses.asl20;
     };
@@ -10943,7 +10943,7 @@ let
 
     meta = {
       homepage = http://liw.fi/tracing/;
-      description = "Python debug logging helper.";
+      description = "Python debug logging helper";
       maintainers = [ stdenv.lib.maintainers.rickynils ];
     };
   };
@@ -10983,7 +10983,7 @@ let
 
     meta = {
       homepage = http://liw.fi/ttystatus/;
-      description = "Progress and status updates on terminals for Python.";
+      description = "Progress and status updates on terminals for Python";
       maintainers = [ stdenv.lib.maintainers.rickynils ];
     };
   };
@@ -11005,7 +11005,7 @@ let
 
     meta = {
       homepage = http://liw.fi/larch/;
-      description = "Python B-tree library.";
+      description = "Python B-tree library";
       maintainers = [ stdenv.lib.maintainers.rickynils ];
     };
   };