Fixed some descriptions

54 files changed, 77 insertions, 78 deletions

diff --git a/pkgs/applications/altcoins/primecoin.nix b/pkgs/applications/altcoins/primecoin.nix
index 11ec35a71bd..61bba04cb6a 100644
--- a/pkgs/applications/altcoins/primecoin.nix
+++ b/pkgs/applications/altcoins/primecoin.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec{
     else "install -D bitcoind $out/bin/primecoind";
 
   meta = {
-    description = "A new type cryptocurrency which is proof-of-work based on searching for prime numbers.";
+    description = "A new type cryptocurrency which is proof-of-work based on searching for prime numbers";
     longDescription= ''
       Primecoin is an innovative cryptocurrency, a form of digital
       currency secured by cryptography and issued through a
diff --git a/pkgs/applications/audio/mopidy-mopify/default.nix b/pkgs/applications/audio/mopidy-mopify/default.nix
index 2dd4c19f0e0..4616d3f7c64 100644
--- a/pkgs/applications/audio/mopidy-mopify/default.nix
+++ b/pkgs/applications/audio/mopidy-mopify/default.nix
@@ -16,7 +16,7 @@ pythonPackages.buildPythonPackage rec {
 
   meta = with stdenv.lib; {
     homepage = https://github.com/dirkgroenen/mopidy-mopify;
-    description = "A mopidy webclient based on the Spotify webbased interface.";
+    description = "A mopidy webclient based on the Spotify webbased interface";
     license = licenses.gpl3;
     maintainers = [ maintainers.Gonzih ];
   };
diff --git a/pkgs/applications/editors/emacs-modes/icicles/default.nix b/pkgs/applications/editors/emacs-modes/icicles/default.nix
index 820e959a357..1a145e1b648 100644
--- a/pkgs/applications/editors/emacs-modes/icicles/default.nix
+++ b/pkgs/applications/editors/emacs-modes/icicles/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation {
 
   meta = {
     homepage = "http://www.emacswiki.org/emacs/Icicles";
-    description = "Enhance Emacs minibuffer input with cycling and powerful completion.";
+    description = "Enhance Emacs minibuffer input with cycling and powerful completion";
     license = stdenv.lib.licenses.gpl2Plus;
 
     maintainers = with stdenv.lib.maintainers; [ simons ];
diff --git a/pkgs/applications/editors/idea/default.nix b/pkgs/applications/editors/idea/default.nix
index 0f9df276569..b99265cf0dd 100644
--- a/pkgs/applications/editors/idea/default.nix
+++ b/pkgs/applications/editors/idea/default.nix
@@ -227,7 +227,7 @@ in
     name = "clion-${version}";
     version = "1.0";
     build = "141.353";
-    description  = "C/C++ IDE. New. Intelligent. Cross-platform.";
+    description  = "C/C++ IDE. New. Intelligent. Cross-platform";
     license = stdenv.lib.licenses.unfree;
     src = fetchurl {
       url = "https://download.jetbrains.com/cpp/${name}.tar.gz";
diff --git a/pkgs/applications/editors/yi/wrapper.nix b/pkgs/applications/editors/yi/wrapper.nix
index 4887662bce5..a4dc3fe367a 100644
--- a/pkgs/applications/editors/yi/wrapper.nix
+++ b/pkgs/applications/editors/yi/wrapper.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation {
   env = yiEnv;
 
   meta = with stdenv.lib; {
-    description = "Allows Yi to find libraries and the compiler easily.";
+    description = "Allows Yi to find libraries and the compiler easily";
     # This wrapper and wrapper only is under PD
     license = licenses.publicDomain;
     maintainers = with maintainers; [ fuuzetsu ];
diff --git a/pkgs/applications/editors/yi/yi.nix b/pkgs/applications/editors/yi/yi.nix
index a63375adfd1..f9ef27d999d 100644
--- a/pkgs/applications/editors/yi/yi.nix
+++ b/pkgs/applications/editors/yi/yi.nix
@@ -30,7 +30,7 @@ cabal.mkDerivation (self: {
   configureFlags = "-fpango -fvty";
   noHaddock = self.stdenv.lib.versionOlder self.ghc.version "7.8";
   meta = {
-    homepage = "http://haskell.org/haskellwiki/Yi";
+    homepage = http://haskell.org/haskellwiki/Yi;
     description = "The Haskell-Scriptable Editor";
     license = self.stdenv.lib.licenses.gpl2;
     platforms = self.ghc.meta.platforms;
diff --git a/pkgs/applications/misc/ctodo/default.nix b/pkgs/applications/misc/ctodo/default.nix
index 3978a369d06..7301ea704e8 100644
--- a/pkgs/applications/misc/ctodo/default.nix
+++ b/pkgs/applications/misc/ctodo/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
 
   meta = {
     homepage = "http://ctodo.apakoh.dk/";
-    description = "A simple ncurses-based task list manager.";
+    description = "A simple ncurses-based task list manager";
     license = stdenv.lib.licenses.mit;
     maintainers = [ stdenv.lib.maintainers.matthiasbeyer ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/networking/cluster/kubernetes/default.nix b/pkgs/applications/networking/cluster/kubernetes/default.nix
index c89ad0a5168..23ec975078b 100644
--- a/pkgs/applications/networking/cluster/kubernetes/default.nix
+++ b/pkgs/applications/networking/cluster/kubernetes/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    description = "Open source implementation of container cluster management.";
+    description = "Open source implementation of container cluster management";
     license = licenses.asl20;
     homepage = https://github.com/GoogleCloudPlatform;
     maintainers = with maintainers; [offline];
diff --git a/pkgs/applications/networking/cluster/marathon/default.nix b/pkgs/applications/networking/cluster/marathon/default.nix
index 36ce79aaf34..1714aa274f0 100644
--- a/pkgs/applications/networking/cluster/marathon/default.nix
+++ b/pkgs/applications/networking/cluster/marathon/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     homepage = https://mesosphere.github.io/marathon;
-    description = "Cluster-wide init and control system for services in cgroups or Docker containers.";
+    description = "Cluster-wide init and control system for services in cgroups or Docker containers";
     license = licenses.asl20;
     maintainers = with maintainers; [ rushmorem ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/networking/feedreaders/rawdog/default.nix b/pkgs/applications/networking/feedreaders/rawdog/default.nix
index fc494c6aebc..231b3195b5f 100644
--- a/pkgs/applications/networking/feedreaders/rawdog/default.nix
+++ b/pkgs/applications/networking/feedreaders/rawdog/default.nix
@@ -14,7 +14,7 @@ pythonPackages.buildPythonPackage rec {
   
   meta = {
     homepage = "http://offog.org/code/rawdog/";
-    description = "an RSS Aggregator Without Delusions Of Grandeur.";
+    description = "An RSS Aggregator Without Delusions Of Grandeur";
     license = stdenv.lib.licenses.gpl2;
     platform = stdenv.lib.platforms.unix;
   };
diff --git a/pkgs/applications/science/programming/kframework/default.nix b/pkgs/applications/science/programming/kframework/default.nix
index 090dc5ac756..e8a4f2b3156 100644
--- a/pkgs/applications/science/programming/kframework/default.nix
+++ b/pkgs/applications/science/programming/kframework/default.nix
@@ -90,7 +90,7 @@ releaseTools.mvnBuild rec {
   '';
 
   meta = {
-    description = "The K Framework is a rewrite-based executable semantic framework in which programming languages, type systems and formal analysis tools can be defined.";
+    description = "A rewrite-based executable semantic framework in which programming languages, type systems and formal analysis tools can be defined";
     homepage = http://www.kframework.org;
     license = stdenv.lib.licenses.bsd3;     # technically it is the UIUC/NCSA license
                                             # but LLVM uses that license as well and
diff --git a/pkgs/data/fonts/dina/default.nix b/pkgs/data/fonts/dina/default.nix
index da7a1bc5fb9..e79dcd014d3 100644
--- a/pkgs/data/fonts/dina/default.nix
+++ b/pkgs/data/fonts/dina/default.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation rec {
   preferLocalBuild = true;
 
   meta = with stdenv.lib; {
-    description = "A monospace bitmap font aimed at programmers.";
+    description = "A monospace bitmap font aimed at programmers";
     longDescription = ''
       Dina is a monospace bitmap font, primarily aimed at programmers. It is
       relatively compact to allow a lot of code on screen, while (hopefully)
diff --git a/pkgs/development/coq-modules/unimath/default.nix b/pkgs/development/coq-modules/unimath/default.nix
index e16156dec53..e6f32d60c4f 100644
--- a/pkgs/development/coq-modules/unimath/default.nix
+++ b/pkgs/development/coq-modules/unimath/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     homepage = https://github.com/UniMath/UniMath;
-    description = "UniMath aims to formalize a substantial body of mathematics using the univalent point of view.";
+    description = "A formalization of a substantial body of mathematics using the univalent point of view";
     maintainers = with maintainers; [ jwiegley ];
     platforms = coq.meta.platforms;
   };
diff --git a/pkgs/development/libraries/geis/default.nix b/pkgs/development/libraries/geis/default.nix
index 15f42afd9a8..24c24fe5f12 100644
--- a/pkgs/development/libraries/geis/default.nix
+++ b/pkgs/development/libraries/geis/default.nix
@@ -16,8 +16,8 @@ stdenv.mkDerivation rec {
 
   meta = {
     homepage = "https://launchpad.net/geis";
-    description = "GEIS is a library for applications and toolkit programmers which provides a consistent platform independent interface for any system-wide input gesture recognition mechanism.";
+    description = "A library for applications and toolkit programmers which provides a consistent platform independent interface for any system-wide input gesture recognition mechanism";
     license = stdenv.lib.licenses.gpl2;
     platforms = stdenv.lib.platforms.linux;
   };
-}
\ No newline at end of file
+}
diff --git a/pkgs/development/libraries/libcouchbase/default.nix b/pkgs/development/libraries/libcouchbase/default.nix
index 841edd3dff6..bcc9e9f673f 100644
--- a/pkgs/development/libraries/libcouchbase/default.nix
+++ b/pkgs/development/libraries/libcouchbase/default.nix
@@ -20,9 +20,9 @@ stdenv.mkDerivation {
   buildInputs = [ autoconf automake libtool pkgconfig perl git libevent openssl];
 
   meta = {
-    description = "C client library for Couchbase.";
+    description = "C client library for Couchbase";
     homepage = "https://github.com/couchbase/libcouchbase";
     license = stdenv.lib.licenses.asl20;
     platforms = stdenv.lib.platforms.unix;
   };
-}
\ No newline at end of file
+}
diff --git a/pkgs/development/libraries/libnetfilter_cthelper/default.nix b/pkgs/development/libraries/libnetfilter_cthelper/default.nix
index 197892897f3..97319840975 100644
--- a/pkgs/development/libraries/libnetfilter_cthelper/default.nix
+++ b/pkgs/development/libraries/libnetfilter_cthelper/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ pkgconfig libmnl ];
 
   meta = {
-    description = "Userspace library that provides the programming interface to the user-space connection tracking helper infrastructure.";
+    description = "Userspace library that provides the programming interface to the user-space connection tracking helper infrastructure";
     longDescription = ''
       libnetfilter_cthelper is the userspace library that provides the programming interface
       to the user-space helper infrastructure available since Linux kernel 3.6. With this
diff --git a/pkgs/development/libraries/libnetfilter_cttimeout/default.nix b/pkgs/development/libraries/libnetfilter_cttimeout/default.nix
index 0626e91b8ba..2920cbd9785 100644
--- a/pkgs/development/libraries/libnetfilter_cttimeout/default.nix
+++ b/pkgs/development/libraries/libnetfilter_cttimeout/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ pkgconfig libmnl ];
 
   meta = {
-    description = "Userspace library that provides the programming interface to the connection tracking timeout infrastructure.";
+    description = "Userspace library that provides the programming interface to the connection tracking timeout infrastructure";
     longDescription = ''
       libnetfilter_cttimeout is the userspace library that provides the programming
       interface to the fine-grain connection tracking timeout infrastructure.
diff --git a/pkgs/development/libraries/libosmpbf/default.nix b/pkgs/development/libraries/libosmpbf/default.nix
index 6ff5d816776..334748d668c 100644
--- a/pkgs/development/libraries/libosmpbf/default.nix
+++ b/pkgs/development/libraries/libosmpbf/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     homepage = https://github.com/scrosby/OSM-binary;
-    description = "C library to read and write OpenStreetMap PBF files.";
+    description = "C library to read and write OpenStreetMap PBF files";
     license = stdenv.lib.licenses.lgpl3;
   };
 }
diff --git a/pkgs/development/libraries/luabind/default.nix b/pkgs/development/libraries/luabind/default.nix
index edb914123e1..e03535ba979 100644
--- a/pkgs/development/libraries/luabind/default.nix
+++ b/pkgs/development/libraries/luabind/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     homepage = https://github.com/luabind/luabind;
-    description = "Luabind is a library that helps you create bindings between C++ and Lua.";
+    description = "A library that helps you create bindings between C++ and Lua";
     license = stdenv.lib.licenses.mit;
   };
 }
diff --git a/pkgs/development/libraries/science/math/arpack/default.nix b/pkgs/development/libraries/science/math/arpack/default.nix
index 296c5f6b920..01bb3371f5e 100644
--- a/pkgs/development/libraries/science/math/arpack/default.nix
+++ b/pkgs/development/libraries/science/math/arpack/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
     homepage = "http://forge.scilab.org/index.php/p/arpack-ng/";
     description = ''
       A collection of Fortran77 subroutines to solve large scale eigenvalue
-      problems.
+      problems
     '';
     license = stdenv.lib.licenses.bsd3;
     maintainers = [ stdenv.lib.maintainers.ttuegel ];
diff --git a/pkgs/development/libraries/stxxl/default.nix b/pkgs/development/libraries/stxxl/default.nix
index b387c59efa1..23590f17ca8 100644
--- a/pkgs/development/libraries/stxxl/default.nix
+++ b/pkgs/development/libraries/stxxl/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     homepage = https://github.com/stxxl/stxxl;
-    description = "STXXL is an implementation of the C++ standard template library STL for external memory (out-of-core) computations.";
+    description = "An implementation of the C++ standard template library STL for external memory (out-of-core) computations";
     license = stdenv.lib.licenses.boost;
   };
 }
diff --git a/pkgs/development/libraries/tevent/default.nix b/pkgs/development/libraries/tevent/default.nix
index db863d951a6..baa7e288178 100644
--- a/pkgs/development/libraries/tevent/default.nix
+++ b/pkgs/development/libraries/tevent/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   ];
 
   meta = with stdenv.lib; {
-    description = "an event system based on the talloc memory management library.";
+    description = "An event system based on the talloc memory management library";
     homepage = http://tevent.samba.org/;
     license = licenses.lgpl3Plus;
     maintainers = with maintainers; [ wkennington ];
diff --git a/pkgs/development/lisp-modules/lisp-packages.nix b/pkgs/development/lisp-modules/lisp-packages.nix
index ff95bb4a000..d7bd2348244 100644
--- a/pkgs/development/lisp-modules/lisp-packages.nix
+++ b/pkgs/development/lisp-modules/lisp-packages.nix
@@ -20,7 +20,7 @@ let lispPackages = rec {
   clx = buildLispPackage rec {
     baseName = "clx";
     version = "git-20150117";
-    description = "An implementation of the X Window System protocol in Lisp.";
+    description = "An implementation of the X Window System protocol in Lisp";
     deps = [];
     # Source type: git
     src = pkgs.fetchgit {
@@ -98,7 +98,7 @@ let lispPackages = rec {
   clx-truetype = buildLispPackage rec {
     baseName = "clx-truetype";
     version = "git-20141112";
-    description = "clx-truetype is pure common lisp solution for antialiased TrueType font rendering using CLX and XRender extension.";
+    description = "clx-truetype is pure common lisp solution for antialiased TrueType font rendering using CLX and XRender extension";
     deps = [cl-fad cl-store cl-vectors clx trivial-features zpb-ttf];
     # Source type: git
     src = pkgs.fetchgit {
@@ -178,7 +178,7 @@ let lispPackages = rec {
   trivial-features = buildLispPackage rec {
     baseName = "trivial-features";
     version = "git-20141112";
-    description = "Ensures consistent *FEATURES* across multiple CLs.";
+    description = "Ensures consistent *FEATURES* across multiple CLs";
     deps = [];
     # Source type: git
     src = pkgs.fetchgit {
@@ -280,7 +280,7 @@ let lispPackages = rec {
   babel = buildLispPackage rec {
     baseName = "babel";
     version = "git-20141113";
-    description = "Babel, a charset conversion library.";
+    description = "A charset conversion library";
     deps = [alexandria trivial-features];
     # Source type: git
     src = pkgs.fetchgit {
@@ -408,7 +408,7 @@ let lispPackages = rec {
   trivial-gray-streams = buildLispPackage rec {
     baseName = "trivial-gray-streams";
     version = "git-20141113";
-    description = "Compatibility layer for Gray Streams (see http://www.cliki.net/Gray%20streams).";
+    description = "Compatibility layer for Gray Streams (see http://www.cliki.net/Gray%20streams)";
     deps = [];
     # Source type: git
     src = pkgs.fetchgit {
@@ -421,7 +421,7 @@ let lispPackages = rec {
   cl-ssl = buildLispPackage rec {
     baseName = "cl+ssl";
     version = "git-20141113";
-    description = "Common Lisp interface to OpenSSL.";
+    description = "Common Lisp interface to OpenSSL";
     deps = [bordeaux-threads cffi flexi-streams trivial-garbage trivial-gray-streams];
     # Source type: git
     src = pkgs.fetchgit {
@@ -448,7 +448,7 @@ let lispPackages = rec {
   trivial-garbage = buildLispPackage rec {
     baseName = "trivial-garbage";
     version = "git-20141113";
-    description = "Portable finalizers, weak hash-tables and weak pointers.";
+    description = "Portable finalizers, weak hash-tables and weak pointers";
     deps = [];
     # Source type: git
     src = pkgs.fetchgit {
@@ -461,7 +461,7 @@ let lispPackages = rec {
   cl-base64 = buildLispPackage rec {
     baseName = "cl-base64";
     version = "git-20141113";
-    description = "Base64 encoding and decoding with URI support.";
+    description = "Base64 encoding and decoding with URI support";
     deps = [];
     # Source type: git
     src = pkgs.fetchgit {
diff --git a/pkgs/development/tools/chefdk/default.nix b/pkgs/development/tools/chefdk/default.nix
index 8352c71a686..f8e759b83ee 100644
--- a/pkgs/development/tools/chefdk/default.nix
+++ b/pkgs/development/tools/chefdk/default.nix
@@ -11,7 +11,7 @@ bundlerEnv {
   buildInputs = [ perl ];
 
   meta = with lib; {
-    description = "A streamlined development and deployment workflow for Chef platform.";
+    description = "A streamlined development and deployment workflow for Chef platform";
     homepage    = https://downloads.chef.io/chef-dk/;
     license     = with licenses; asl20;
     maintainers = with maintainers; [ offline ];
diff --git a/pkgs/development/tools/database/sqldeveloper/default.nix b/pkgs/development/tools/database/sqldeveloper/default.nix
index 9a0afdc8e1d..7c4aefee639 100644
--- a/pkgs/development/tools/database/sqldeveloper/default.nix
+++ b/pkgs/development/tools/database/sqldeveloper/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    description = "Oracle's Oracle DB GUI client.";
+    description = "Oracle's Oracle DB GUI client";
     longDescription = ''
       Oracle SQL Developer is a free integrated development environment that
       simplifies the development and management of Oracle Database in both
diff --git a/pkgs/development/tools/misc/autoconf-archive/default.nix b/pkgs/development/tools/misc/autoconf-archive/default.nix
index 0e6ca01c625..c5c965ac58e 100644
--- a/pkgs/development/tools/misc/autoconf-archive/default.nix
+++ b/pkgs/development/tools/misc/autoconf-archive/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ xz ];
 
   meta = with stdenv.lib; {
-    description = "Archive of autoconf m4 macros.";
+    description = "Archive of autoconf m4 macros";
     homepage = http://www.gnu.org/software/autoconf-archive/;
     license = licenses.gpl3;
   };
diff --git a/pkgs/development/tools/misc/checkbashisms/default.nix b/pkgs/development/tools/misc/checkbashisms/default.nix
index 259224aac5d..9c48227c9a8 100644
--- a/pkgs/development/tools/misc/checkbashisms/default.nix
+++ b/pkgs/development/tools/misc/checkbashisms/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     homepage = http://sourceforge.net/projects/checkbaskisms/;
-    description = "Performs basic checks on shell scripts for the presence of non portable syntax.";
+    description = "Performs basic checks on shell scripts for the presence of non portable syntax";
     license = stdenv.lib.licenses.gpl2;
   };
 
diff --git a/pkgs/development/tools/parsing/jshon/default.nix b/pkgs/development/tools/parsing/jshon/default.nix
index fa11671db0b..4b35ba0cce2 100644
--- a/pkgs/development/tools/parsing/jshon/default.nix
+++ b/pkgs/development/tools/parsing/jshon/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   meta = with lib; {
     homepage = http://kmkeen.com/jshon;
-    description = "JSON parser designed for maximum convenience within the shell.";
+    description = "JSON parser designed for maximum convenience within the shell";
     license = licenses.free;
     platforms = platforms.all;
     maintainers = with maintainers; [ rushmorem ];
diff --git a/pkgs/development/tools/rust/racer/default.nix b/pkgs/development/tools/rust/racer/default.nix
index 341088dc0f2..4ef9cc6d285 100644
--- a/pkgs/development/tools/rust/racer/default.nix
+++ b/pkgs/development/tools/rust/racer/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    description = "A utility intended to provide Rust code completion for editors and IDEs.";
+    description = "A utility intended to provide Rust code completion for editors and IDEs";
     homepage = https://github.com/phildawes/racer;
     license = stdenv.lib.licenses.mit;
     maintainers = [ maintainers.jagajaga ];
diff --git a/pkgs/development/tools/selenium/selendroid/default.nix b/pkgs/development/tools/selenium/selendroid/default.nix
index e34e479e938..6604bc5648d 100644
--- a/pkgs/development/tools/selenium/selendroid/default.nix
+++ b/pkgs/development/tools/selenium/selendroid/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     homepage = https://code.google.com/p/selenium;
-    description = "Test automation for native or hybrid Android apps and the mobile web.";
+    description = "Test automation for native or hybrid Android apps and the mobile web";
     maintainers = with maintainers; [ offline ];
     platforms = platforms.all;
     license = licenses.asl20;
diff --git a/pkgs/games/gnubg/default.nix b/pkgs/games/gnubg/default.nix
index 00ae4e28860..83560c21f5d 100644
--- a/pkgs/games/gnubg/default.nix
+++ b/pkgs/games/gnubg/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation {
   configureFlags = [ "--with-gtk" "--with--board3d" ];
 
   meta = with stdenv.lib;
-    { description = "World class backgammon application.";
+    { description = "World class backgammon application";
       homepage = http://www.gnubg.org/;
       license = licenses.gpl3;
       maintainers = [ maintainers.emery ];
diff --git a/pkgs/games/scrolls/default.nix b/pkgs/games/scrolls/default.nix
index 171a6d6fe83..376d1e33473 100644
--- a/pkgs/games/scrolls/default.nix
+++ b/pkgs/games/scrolls/default.nix
@@ -5,7 +5,7 @@ stdenv.mkDerivation {
   name = "scrolls-2014-03-08";
 
   meta = {
-    description = "Scrolls is a strategy collectible card game.";
+    description = "A strategy collectible card game";
     homepage = "https://scrolls.com/";
     # http://www.reddit.com/r/Scrolls/comments/2j3pxw/linux_client_experimental/
 
diff --git a/pkgs/misc/emulators/cdemu/base.nix b/pkgs/misc/emulators/cdemu/base.nix
index b2b641e3f7a..58727f10ef1 100644
--- a/pkgs/misc/emulators/cdemu/base.nix
+++ b/pkgs/misc/emulators/cdemu/base.nix
@@ -17,7 +17,7 @@ in stdenv.mkDerivation ({
     cmake ../${name} -DCMAKE_INSTALL_PREFIX=$out -DCMAKE_BUILD_TYPE=Release -DCMAKE_SKIP_RPATH=ON
   '';
   meta = {
-    description = "CDemu is a software suite designed to emulate an optical drive and disc (including CD-ROMs and DVD-ROMs) on the Linux operating system.";
+    description = "A Software suite designed to emulate an optical drive and disc (including CD-ROMs and DVD-ROMs) on the Linux operating system";
     longDescription = ''
       CDEmu consists of:
 
diff --git a/pkgs/servers/mail/exim/default.nix b/pkgs/servers/mail/exim/default.nix
index ae4e1d6f245..3dd0463b604 100644
--- a/pkgs/servers/mail/exim/default.nix
+++ b/pkgs/servers/mail/exim/default.nix
@@ -55,7 +55,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     homepage = "http://exim.org/";
-    description = "Exim is a mail transfer agent (MTA) for hosts that are running Unix or Unix-like operating systems.";
+    description = "A mail transfer agent (MTA) for hosts that are running Unix or Unix-like operating systems";
     license = stdenv.lib.licenses.gpl3;
     platforms = stdenv.lib.platforms.linux;
     maintainers = [ stdenv.lib.maintainers.tv ];
diff --git a/pkgs/servers/monitoring/cadvisor/default.nix b/pkgs/servers/monitoring/cadvisor/default.nix
index 1e818a508d9..c0126fda572 100644
--- a/pkgs/servers/monitoring/cadvisor/default.nix
+++ b/pkgs/servers/monitoring/cadvisor/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    description = "Analyzes resource usage and performance characteristics of running docker containers.";
+    description = "Analyzes resource usage and performance characteristics of running docker containers";
     homepage = https://github.com/google/cadvisor;
     license = licenses.asl20;
     maintainers = with maintainers; [ offline ];
diff --git a/pkgs/servers/monitoring/sensu/default.nix b/pkgs/servers/monitoring/sensu/default.nix
index 2785898bed5..38e59a39f38 100644
--- a/pkgs/servers/monitoring/sensu/default.nix
+++ b/pkgs/servers/monitoring/sensu/default.nix
@@ -9,8 +9,7 @@
     gemset = ./gemset.nix;
 
     meta = with lib; {
-      description = "A monitoring framework that aims to be simple, malleable,
-and scalable.";
+      description = "A monitoring framework that aims to be simple, malleable, and scalable";
       homepage    = http://sensuapp.org/;
       license     = with licenses; mit;
       maintainers = with maintainers; [ theuni ];
diff --git a/pkgs/servers/osrm-backend/default.nix b/pkgs/servers/osrm-backend/default.nix
index 37d3650f683..3e9e2158524 100644
--- a/pkgs/servers/osrm-backend/default.nix
+++ b/pkgs/servers/osrm-backend/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     homepage = https://github.com/Project-OSRM/osrm-backend/wiki;
-    description = "Open Source Routing Machine computes shortest paths in a graph. It was designed to run well with map data from the Openstreetmap Project.";
+    description = "Open Source Routing Machine computes shortest paths in a graph. It was designed to run well with map data from the Openstreetmap Project";
     license = stdenv.lib.licenses.bsd2;
   };
 }
diff --git a/pkgs/servers/sql/pgpool/default.nix b/pkgs/servers/sql/pgpool/default.nix
index 137e536e5d8..775621e64b4 100644
--- a/pkgs/servers/sql/pgpool/default.nix
+++ b/pkgs/servers/sql/pgpool/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     homepage = http://pgpool.net/mediawiki/index.php;
-    description = "a middleware that works between postgresql servers and postgresql clients.";
+    description = "A middleware that works between postgresql servers and postgresql clients";
     license = licenses.free;
     platforms = platforms.linux;
     maintainers = with maintainers; [ wkennington ];
diff --git a/pkgs/tools/backup/bareos/default.nix b/pkgs/tools/backup/bareos/default.nix
index 57ca79a00a2..016e3c5d51e 100644
--- a/pkgs/tools/backup/bareos/default.nix
+++ b/pkgs/tools/backup/bareos/default.nix
@@ -69,7 +69,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     homepage = http://www.bareos.org/;
-    description = "a fork of the bacula project.";
+    description = "A fork of the bacula project";
     license = licenses.agpl3;
     platforms = platforms.unix;
     maintainers = with maintainers; [ wkennington ];
diff --git a/pkgs/tools/compression/dtrx/default.nix b/pkgs/tools/compression/dtrx/default.nix
index 0d7a0e14e7d..343709dd957 100644
--- a/pkgs/tools/compression/dtrx/default.nix
+++ b/pkgs/tools/compression/dtrx/default.nix
@@ -10,7 +10,7 @@ pythonPackages.buildPythonPackage rec {
   };
 
   meta = with stdenv.lib; {
-    description = "Do The Right Extraction: A tool for taking the hassle out of extracting archives.";
+    description = "Do The Right Extraction: A tool for taking the hassle out of extracting archives";
     homepage = "http://brettcsmith.org/2007/dtrx/";
     license = licenses.gpl3Plus;
     maintainers = [ maintainers.spwhitt ];
diff --git a/pkgs/tools/filesystems/duff/default.nix b/pkgs/tools/filesystems/duff/default.nix
index 0f9bff82967..409e7a8c36f 100644
--- a/pkgs/tools/filesystems/duff/default.nix
+++ b/pkgs/tools/filesystems/duff/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   meta = with stdenv.lib; {
-    description = "Quickly find duplicate files.";
+    description = "Quickly find duplicate files";
     homepage = http://duff.dreda.org/;
     license = with licenses; zlib;
     longDescription = ''
diff --git a/pkgs/tools/misc/fluentd/default.nix b/pkgs/tools/misc/fluentd/default.nix
index b659dafddeb..cfc1e9ab564 100644
--- a/pkgs/tools/misc/fluentd/default.nix
+++ b/pkgs/tools/misc/fluentd/default.nix
@@ -11,7 +11,7 @@ bundlerEnv {
   buildInputs = [ curl ];
 
   meta = with lib; {
-    description = "Fluentd data collector.";
+    description = "A data collector";
     homepage    = http://www.fluentd.org/;
     license     = with licenses; asl20;
     maintainers = with maintainers; [ offline ];
diff --git a/pkgs/tools/misc/moreutils/default.nix b/pkgs/tools/misc/moreutils/default.nix
index 5a42a5d8515..843672fa26c 100644
--- a/pkgs/tools/misc/moreutils/default.nix
+++ b/pkgs/tools/misc/moreutils/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   postInstall = "wrapProgram $out/bin/chronic --prefix PERL5LIB : $PERL5LIB";
 
   meta = {
-    description = "Growing collection of the unix tools that nobody thought to write long ago when unix was young.";
+    description = "Growing collection of the unix tools that nobody thought to write long ago when unix was young";
     homepage = https://joeyh.name/code/moreutils/;
     maintainers = with maintainers; [ koral ];
   };
diff --git a/pkgs/tools/misc/rmlint/default.nix b/pkgs/tools/misc/rmlint/default.nix
index 21643a9d11a..aed93775ce9 100644
--- a/pkgs/tools/misc/rmlint/default.nix
+++ b/pkgs/tools/misc/rmlint/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
   installPhase = "scons --prefix=$out install";
 
   meta = {
-    description = "Extremely fast tool to remove duplicates and other lint from your filesystem.";
+    description = "Extremely fast tool to remove duplicates and other lint from your filesystem";
     homepage = http://rmlint.readthedocs.org;
     platforms = platforms.linux;
     license = licenses.gpl3;
diff --git a/pkgs/tools/misc/t/default.nix b/pkgs/tools/misc/t/default.nix
index 10db8764f89..fd64f6694ee 100644
--- a/pkgs/tools/misc/t/default.nix
+++ b/pkgs/tools/misc/t/default.nix
@@ -9,7 +9,7 @@ bundlerEnv {
   gemset = ./gemset.nix;
 
   meta = with lib; {
-    description = "A command-line power tool for Twitter.";
+    description = "A command-line power tool for Twitter";
     homepage    = http://sferik.github.io/t/;
     license     = with licenses; asl20;
     maintainers = with maintainers; [ offline ];
diff --git a/pkgs/tools/networking/wrk/default.nix b/pkgs/tools/networking/wrk/default.nix
index 9af28dbebd6..f4cdb7eaddb 100644
--- a/pkgs/tools/networking/wrk/default.nix
+++ b/pkgs/tools/networking/wrk/default.nix
@@ -21,7 +21,7 @@ in stdenv.mkDerivation rec {
   '';
   
   meta = with stdenv.lib; {
-    description = "HTTP benchmarking tool.";
+    description = "HTTP benchmarking tool";
     homepage = http://github.com/wg/wrk;
     longDescription = ''
       wrk is a modern HTTP benchmarking tool capable of generating
diff --git a/pkgs/tools/system/augeas/default.nix b/pkgs/tools/system/augeas/default.nix
index e6b09932f86..263690728d2 100644
--- a/pkgs/tools/system/augeas/default.nix
+++ b/pkgs/tools/system/augeas/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ pkgconfig readline libxml2 ];
 
   meta = with stdenv.lib; {
-    description = "Configuration editing tool.";
+    description = "Configuration editing tool";
     license = licenses.lgpl2;
     homepage = http://augeas.net/;
     maintainers = with maintainers; [offline];
diff --git a/pkgs/tools/system/honcho/default.nix b/pkgs/tools/system/honcho/default.nix
index 6bf2a995a24..b52c1c0f636 100644
--- a/pkgs/tools/system/honcho/default.nix
+++ b/pkgs/tools/system/honcho/default.nix
@@ -20,7 +20,7 @@ let honcho = buildPythonPackage rec {
   doCheck = false;
 
   meta = with stdenv.lib; {
-    description = "A Python clone of Foreman, a tool for managing Procfile-based applications.";
+    description = "A Python clone of Foreman, a tool for managing Procfile-based applications";
     license = licenses.mit;
     homepage = https://github.com/nickstenning/honcho;
     maintainers = with maintainers; [ benley ];
diff --git a/pkgs/tools/text/grin/default.nix b/pkgs/tools/text/grin/default.nix
index da7799900a3..2ea4a950145 100644
--- a/pkgs/tools/text/grin/default.nix
+++ b/pkgs/tools/text/grin/default.nix
@@ -14,7 +14,7 @@ pythonPackages.buildPythonPackage rec {
 
   meta = {
     homepage = https://pypi.python.org/pypi/grin;
-    description = "A grep program configured the way I like it.";
+    description = "A grep program configured the way I like it";
     platform = stdenv.lib.platforms.all;
     maintainers = [ stdenv.lib.maintainers.sjagoe ];
   };
diff --git a/pkgs/tools/text/html2text/default.nix b/pkgs/tools/text/html2text/default.nix
index 27de591d889..8fd0bea2254 100644
--- a/pkgs/tools/text/html2text/default.nix
+++ b/pkgs/tools/text/html2text/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation {
   '';
 
   meta = {
-    description = "html2text is a command line utility, written in C++, that converts HTML documents into plain text.";
+    description = "A command line utility, written in C++, that converts HTML documents into plain text";
     homepage = http://www.mbayer.de/html2text/;
     license = stdenv.lib.licenses.gpl2Plus;
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/top-level/go-packages.nix b/pkgs/top-level/go-packages.nix
index 42b73fe612d..8c2f090e0c1 100644
--- a/pkgs/top-level/go-packages.nix
+++ b/pkgs/top-level/go-packages.nix
@@ -448,7 +448,7 @@ let self = _self // overrides; _self = with self; {
 
     meta = with stdenv.lib; {
       homepage    = "https://github.com/jteeuwen/go-bindata";
-      description = "A small utility which generates Go code from any file. Useful for embedding binary data in a Go program.";
+      description = "A small utility which generates Go code from any file, useful for embedding binary data in a Go program";
       maintainers = with maintainers; [ cstrahan ];
       license     = licenses.cc0 ;
       platforms   = platforms.all;
diff --git a/pkgs/top-level/lua-packages.nix b/pkgs/top-level/lua-packages.nix
index 766ff90d5b7..773ddd29521 100644
--- a/pkgs/top-level/lua-packages.nix
+++ b/pkgs/top-level/lua-packages.nix
@@ -74,7 +74,7 @@ let
 
     meta = with stdenv.lib; {
       homepage = http://luaforge.net/projects/luaevent/;
-      description = "Binding of libevent to Lua.";
+      description = "Binding of libevent to Lua";
       license = licenses.mit;
       maintainers = [ maintainers.koral ];
     };
diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index 0c86204cfd2..56bffa0bc51 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -6727,7 +6727,7 @@ let self = _self // overrides; _self = with self; {
       sha256 = "0s0albdw0zvg3w37s7is7gddr4mqwicjxxsy400n1p96l7ipnw4x";
     };
     meta = {
-      description = "Mozilla's ldap client library.";
+      description = "Mozilla's ldap client library";
       license = "unknown";
     };
   };
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 0734c0d0727..0f224aae2f3 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -435,7 +435,7 @@ let
 
     meta = {
       homepage = http://github.com/celery/py-amqp;
-      description = "Python client for the Advanced Message Queuing Procotol (AMQP). This is a fork of amqplib which is maintained by the Celery project.";
+      description = "Python client for the Advanced Message Queuing Procotol (AMQP). This is a fork of amqplib which is maintained by the Celery project";
       license = licenses.lgpl21;
     };
   };
@@ -668,7 +668,7 @@ let
     };
 
     meta = {
-      description = "Utilities and Python modules for handling audio.";
+      description = "Utilities and Python modules for handling audio";
       homepage = "http://audiotools.sourceforge.net/";
       license = stdenv.lib.licenses.gpl2Plus;
     };
@@ -794,7 +794,7 @@ let
 
     meta = {
       homepage = http://pypi.python.org/pypi/babelfish;
-      description = "A module to work with countries and languages.";
+      description = "A module to work with countries and languages";
       license = stdenv.lib.licenses.bsd3;
     };
   };
@@ -1172,7 +1172,7 @@ let
     propagatedBuildInputs = with self; [ six html5lib ];
 
     meta = with stdenv.lib; {
-      description = "An easy, HTML5, whitelisting HTML sanitizer.";
+      description = "An easy, HTML5, whitelisting HTML sanitizer";
       longDescription = ''
         Bleach is an HTML sanitizing library that escapes or strips markup and
         attributes based on a white list. Bleach can also linkify text safely,
@@ -5784,7 +5784,7 @@ let
     meta = {
       homepage = http://pypi.python.org/pypi/guessit;
       license = stdenv.lib.licenses.lgpl3;
-      description = "A library for guessing information from video files.";
+      description = "A library for guessing information from video files";
     };
   };
 
@@ -6227,7 +6227,7 @@ let
 
     meta = with stdenv.lib; {
       homepage = http://maebert.github.io/jrnl/;
-      description = "A simple command line journal application that stores your journal in a plain text file.";
+      description = "A simple command line journal application that stores your journal in a plain text file";
       license = licenses.mit;
     };
   };
@@ -6775,7 +6775,7 @@ let
 
     meta = with stdenv.lib; {
       description = ''
-        A content management platform built using the Django framework.
+        A content management platform built using the Django framework
       '';
       longDescription = ''
         Mezzanine is a powerful, consistent, and flexible content management
@@ -7713,8 +7713,8 @@ let
     };
 
     meta = {
-      homepage = "http://code.google.com/p/oauth";
-      description = "Library for OAuth version 1.0a.";
+      homepage = http://code.google.com/p/oauth;
+      description = "Library for OAuth version 1.0a";
       license = licenses.mit;
       platforms = stdenv.lib.platforms.all;
     };
@@ -9490,7 +9490,7 @@ let
 
     meta = {
       homepage = http://pyparsing.wikispaces.com/;
-      description = "The pyparsing module is an alternative approach to creating and executing simple grammars, vs. the traditional lex/yacc approach, or the use of regular expressions.";
+      description = "An alternative approach to creating and executing simple grammars, vs. the traditional lex/yacc approach, or the use of regular expressions";
     };
   };
 
@@ -11636,7 +11636,7 @@ let
     propagatedBuildInputs = with self; [ docutils jinja2 pygments sphinx_rtd_theme alabaster Babel snowballstemmer  six ];
 
     meta = with stdenv.lib; {
-      description = "Sphinx is a tool that makes it easy to create intelligent and beautiful documentation for Python projects.";
+      description = "A tool that makes it easy to create intelligent and beautiful documentation for Python projects";
       homepage = http://sphinx.pocoo.org/;
       license = licenses.bsd3;
       platforms = platforms.unix;
@@ -13004,7 +13004,7 @@ let
     propagatedBuildInputs = with pythonPackages; [ feedparser pytz lxml praw pyenchant pygeoip backports_ssl_match_hostname_3_4_0_2 ];
 
     meta = with stdenv.lib; {
-      description = "Willie is a simple, lightweight, open source, easy-to-use IRC utility bot, written in Python.";
+      description = "A simple, lightweight, open source, easy-to-use IRC utility bot, written in Python";
       homepage = http://willie.dftba.net/;
       license = licenses.efl20;
     };
@@ -14796,8 +14796,8 @@ let
     propagatedBuildInputs = with self; [ nose ];
 
     meta = {
-      homepage = "https://more-itertools.readthedocs.org";
-      description = "Expansion of the itertools module.";
+      homepage = https://more-itertools.readthedocs.org;
+      description = "Expansion of the itertools module";
       license = licenses.mit;
     };
   };
@@ -14830,7 +14830,7 @@ let
     };
 
     meta = with stdenv.lib; {
-      description = "Collection of fancy functional tools focused on practicality.";
+      description = "Collection of fancy functional tools focused on practicality";
       homepage = "http://funcy.readthedocs.org/";
       license = stdenv.lib.licenses.bsd3;