diff --git a/pkgs/applications/audio/beast/default.nix b/pkgs/applications/audio/beast/default.nix
index 340a83e7963f..3997855a75b6 100644
--- a/pkgs/applications/audio/beast/default.nix
+++ b/pkgs/applications/audio/beast/default.nix
@@ -29,9 +29,9 @@ stdenv.mkDerivation {
       ./patch.patch # patches taken from gentoo
     ];
 
-  meta = { 
+  meta = with stdenv.lib; {
     description = "A music composition and modular synthesis application";
     homepage = http://beast.gtk.org;
-    license = ["GPL-2" "LGPL-2.1"];
+    license = with licenses; [ gpl2 lgpl21 ];
   };
 }
diff --git a/pkgs/applications/editors/emacs-modes/jabber/default.nix b/pkgs/applications/editors/emacs-modes/jabber/default.nix
index 82028722f54c..cb8a22a3c06f 100644
--- a/pkgs/applications/editors/emacs-modes/jabber/default.nix
+++ b/pkgs/applications/editors/emacs-modes/jabber/default.nix
@@ -8,7 +8,7 @@ stdenv.mkDerivation rec {
     sha256 = "75e3b7853de4783b8ab8270dcbe6a1e4f576224f77f7463116532e11c6498c26";
   };
   buildInputs = [ emacs ];
-  meta = {
+  meta = with stdenv.lib; {
     description = "A Jabber client for Emacs";
     longDescription = ''
       jabber.el is a Jabber client for Emacs. It may seem strange to have a
@@ -16,8 +16,8 @@ stdenv.mkDerivation rec {
       a special case of text editing.
     '';
     homepage = http://emacs-jabber.sourceforge.net/;
-    license = [ "GPLv2+" ];
-    maintainers = with stdenv.lib.maintainers; [ astsmtl ];
-    platforms = with stdenv.lib.platforms; linux;
+    license = with licenses; gpl2Plus;
+    maintainers = with maintainers; [ astsmtl ];
+    platforms = with platforms; linux;
   };
 }
diff --git a/pkgs/applications/editors/emacs-modes/nyan-mode/default.nix b/pkgs/applications/editors/emacs-modes/nyan-mode/default.nix
index ab94dbae9501..a21c73b7e8b0 100644
--- a/pkgs/applications/editors/emacs-modes/nyan-mode/default.nix
+++ b/pkgs/applications/editors/emacs-modes/nyan-mode/default.nix
@@ -1,4 +1,4 @@
-{trivialBuild, fetchFromGitHub}:
+{trivialBuild, lib, fetchFromGitHub}:
 
 trivialBuild rec {
   pname    = "nyan-mode";
@@ -23,9 +23,9 @@ trivialBuild rec {
     cp -r mus $out
   '';
 
-  meta = {
+  meta = with lib; {
     description = "An analog indicator of the position in the buffer";
     homepage = https://github.com/TeMPOraL/nyan-mode/;
-    license = "GPLv3+";
+    license = with licenses; gpl3Plus;
   };
 }
diff --git a/pkgs/applications/graphics/gimp/plugins/default.nix b/pkgs/applications/graphics/gimp/plugins/default.nix
index 5f43abfcfc1e..8ece9ba2453c 100644
--- a/pkgs/applications/graphics/gimp/plugins/default.nix
+++ b/pkgs/applications/graphics/gimp/plugins/default.nix
@@ -59,12 +59,12 @@ rec {
       sed -e 's,^\(GIMP_PLUGIN_DIR=\).*,\1'"$out/${gimp.name}-plugins", \
        -e 's,^\(GIMP_DATA_DIR=\).*,\1'"$out/share/${gimp.name}", -i configure
     '';
-    meta = {
+    meta = with stdenv.lib; {
       description = "The GIMP Animation Package";
       homepage = http://www.gimp.org;
       # The main code is given in GPLv3, but it has ffmpeg in it, and I think ffmpeg license
       # falls inside "free".
-      license = [ "GPLv3" "free" ];
+      license = with licenses; [ gpl3 free ];
     };
   };
 
diff --git a/pkgs/applications/misc/eaglemode/default.nix b/pkgs/applications/misc/eaglemode/default.nix
index db613cd49222..47535ab6b903 100644
--- a/pkgs/applications/misc/eaglemode/default.nix
+++ b/pkgs/applications/misc/eaglemode/default.nix
@@ -31,11 +31,11 @@ stdenv.mkDerivation rec {
     ln -s $out/eaglemode.sh $out/bin/eaglemode.sh
   '';
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = "http://eaglemode.sourceforge.net";
     description = "Zoomable User Interface";
-    license="GPLv3";
-    maintainers = with stdenv.lib.maintainers; [viric];
-    platforms = with stdenv.lib.platforms; linux;
+    license = with licenses; gpl3;
+    maintainers = with maintainers; [ viric ];
+    platforms = with platforms; linux;
   };
 }
diff --git a/pkgs/applications/networking/browsers/conkeror/default.nix b/pkgs/applications/networking/browsers/conkeror/default.nix
index f6e3cd3cf8d1..9715b46ed507 100644
--- a/pkgs/applications/networking/browsers/conkeror/default.nix
+++ b/pkgs/applications/networking/browsers/conkeror/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
       --add-flags "-app $out/libexec/conkeror/application.ini"
   '';
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "A keyboard-oriented, customizable, extensible web browser";
     longDescription = ''
       Conkeror is a keyboard-oriented, highly-customizable, highly-extensible
@@ -30,8 +30,8 @@ stdenv.mkDerivation {
       self-documenting, featuring a powerful interactive help system.
     '';
     homepage = http://conkeror.org/;
-    license = [ "MPLv1.1" "GPLv2" "LGPLv2.1" ];
-    maintainers = with stdenv.lib.maintainers; [ astsmtl chaoflow ];
-    platforms = with stdenv.lib.platforms; linux;
+    license = with licenses; [ mpl11 gpl2 lgpl21 ];
+    maintainers = with maintainers; [ astsmtl chaoflow ];
+    platforms = with platforms; linux;
   };
 }
diff --git a/pkgs/applications/networking/browsers/mozilla-plugins/fribid/default.nix b/pkgs/applications/networking/browsers/mozilla-plugins/fribid/default.nix
index 3b473019600f..b8aa17803e9f 100644
--- a/pkgs/applications/networking/browsers/mozilla-plugins/fribid/default.nix
+++ b/pkgs/applications/networking/browsers/mozilla-plugins/fribid/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   passthru.mozillaPlugin = "/lib/mozilla/plugins";
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "A browser plugin to manage Swedish BankID:s";
     longDescription = ''
       FriBID is an open source software for the Swedish e-id system
@@ -30,8 +30,8 @@ stdenv.mkDerivation rec {
       support.
     '';
     homepage = http://fribid.se;
-    license = [ "GPLv2" "MPLv1" ];
-    maintainers = [ stdenv.lib.maintainers.edwtjo ];
-    platforms = with stdenv.lib.platforms; linux;
+    license = with licenses; [ gpl2 mpl10 ];
+    maintainers = [ maintainers.edwtjo ];
+    platforms = with platforms; linux;
   };
 }
diff --git a/pkgs/applications/networking/browsers/mozilla-plugins/mplayerplug-in/default.nix b/pkgs/applications/networking/browsers/mozilla-plugins/mplayerplug-in/default.nix
index 105e5904715c..07e152e91dbc 100644
--- a/pkgs/applications/networking/browsers/mozilla-plugins/mplayerplug-in/default.nix
+++ b/pkgs/applications/networking/browsers/mozilla-plugins/mplayerplug-in/default.nix
@@ -28,9 +28,9 @@ stdenv.mkDerivation rec {
     mozillaPlugin = "/lib/mozilla/plugins";
   };
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "A browser plugin that uses mplayer to play digital media from websites";
     homepage = http://mplayerplug-in.sourceforge.net/;
-    license = [ "GPLv2+" "LGPLv2+" "MPLv1+" ];
+    license = with licenses; [ gpl2Plus lgpl2Plus "MPLv1+" ];
   };
 }
diff --git a/pkgs/applications/networking/browsers/netsurf/netsurf.nix b/pkgs/applications/networking/browsers/netsurf/netsurf.nix
index 2d2253f43ef1..f7e90b61a941 100644
--- a/pkgs/applications/networking/browsers/netsurf/netsurf.nix
+++ b/pkgs/applications/networking/browsers/netsurf/netsurf.nix
@@ -23,12 +23,15 @@ stdenv.mkDerivation {
   buildPhase = "make PREFIX=$out";
   installPhase = "make PREFIX=$out install";
 
-  meta = { 
+  meta = with args.lib; {
     description = "free, open source web browser";
     homepage = http://www.netsurf-browser.org;
-    license = ["GPLv2" /* visual worrk : */ "MIT" ];
-    maintainers = [args.lib.maintainers.marcweber];
-    platforms = args.lib.platforms.linux;
+    license = with licenses; [
+      gpl2
+      mit /* visual work */
+    ];
+    maintainers = with maintainers; [ marcweber ];
+    platforms = platforms.linux;
   };
 
 }
diff --git a/pkgs/applications/science/electronics/ngspice/default.nix b/pkgs/applications/science/electronics/ngspice/default.nix
index 493af97d1567..e64ea909cbb9 100644
--- a/pkgs/applications/science/electronics/ngspice/default.nix
+++ b/pkgs/applications/science/electronics/ngspice/default.nix
@@ -12,11 +12,11 @@ stdenv.mkDerivation {
 
   configureFlags = [ "--enable-x" "--with-x" "--with-readline" ];
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "The Next Generation Spice (Electronic Circuit Simulator)";
     homepage = "http://ngspice.sourceforge.net";
-    license = ["BSD" "GPLv2"];
-    maintainers = with stdenv.lib.maintainers; [viric];
-    platforms = with stdenv.lib.platforms; linux;
+    license = with licenses; [ "BSD" gpl2 ];
+    maintainers = with maintainers; [ viric ];
+    platforms = with platforms; linux;
   };
 }
diff --git a/pkgs/applications/science/math/pari/default.nix b/pkgs/applications/science/math/pari/default.nix
index 0dbab841a81b..b97314f02d1d 100644
--- a/pkgs/applications/science/math/pari/default.nix
+++ b/pkgs/applications/science/math/pari/default.nix
@@ -16,12 +16,12 @@ stdenv.mkDerivation rec {
     "--with-gmp=${gmp} " +
     "--with-readline=${readline}";
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "Computer algebra system for high-performance number theory computations";
     homepage    = "http://pari.math.u-bordeaux.fr/";
-    license     = "GPLv2+";
-    maintainers = with stdenv.lib.maintainers; [ertes raskin];
-    platforms   = stdenv.lib.platforms.linux;
+    license     = with licenses; gpl2Plus;
+    maintainers = with maintainers; [ ertes raskin ];
+    platforms   = platforms.linux;
 
     inherit version;
     downloadPage = "http://pari.math.u-bordeaux.fr/download.html";
diff --git a/pkgs/applications/science/math/speedcrunch/default.nix b/pkgs/applications/science/math/speedcrunch/default.nix
index dee33a04be22..e2f34d48de27 100644
--- a/pkgs/applications/science/math/speedcrunch/default.nix
+++ b/pkgs/applications/science/math/speedcrunch/default.nix
@@ -23,9 +23,9 @@ stdenv.mkDerivation rec {
 
   buildFlags = "VERBOSE=1";
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage    = "http://speedcrunch.digitalfanatics.org";
-    license     = "GPLv2+";
+    license     = with licenses; gpl2Plus;
     description = "A fast power user calculator";
     longDescription = ''
       SpeedCrunch is a fast, high precision and powerful desktop calculator.
diff --git a/pkgs/applications/science/molecular-dynamics/gromacs/default.nix b/pkgs/applications/science/molecular-dynamics/gromacs/default.nix
index 879690bc91ed..bb851140b45d 100644
--- a/pkgs/applications/science/molecular-dynamics/gromacs/default.nix
+++ b/pkgs/applications/science/molecular-dynamics/gromacs/default.nix
@@ -19,9 +19,9 @@ stdenv.mkDerivation {
     ${if singlePrec then "-DGMX_DOUBLE=OFF" else "-DGMX_DOUBLE=ON -DGMX_DEFAULT_SUFFIX=OFF"}
   '';
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage    = "http://www.gromacs.org";
-    license     = "GPLv2";
+    license     = with licenses; gpl2;
     description = "Molecular dynamics software package";
     longDescription = ''
       GROMACS is a versatile package to perform molecular dynamics,
diff --git a/pkgs/applications/video/dvdauthor/default.nix b/pkgs/applications/video/dvdauthor/default.nix
index cab7b4112d03..03ccb2664fce 100644
--- a/pkgs/applications/video/dvdauthor/default.nix
+++ b/pkgs/applications/video/dvdauthor/default.nix
@@ -18,9 +18,9 @@ stdenv.mkDerivation rec{
     ./dvdauthor-imagemagick-0.7.0.patch
   ];
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "Tools for generating DVD files to be played on standalone DVD players";
     homepage = http://dvdauthor.sourceforge.net/;
-    license = ["GPLv2"];
+    license = with licenses; gpl2;
   };
 }
diff --git a/pkgs/applications/window-managers/awesome/default.nix b/pkgs/applications/window-managers/awesome/default.nix
index 3541743057cc..a158dd8dcf45 100644
--- a/pkgs/applications/window-managers/awesome/default.nix
+++ b/pkgs/applications/window-managers/awesome/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "Highly configurable, dynamic window manager for X";
     homepage    = http://awesome.naquadah.org/;
-    license     = "GPLv2+";
+    license     = with licenses; gpl2Plus;
     maintainers = with maintainers; [ lovek323 ];
     platforms   = platforms.linux;
   };
diff --git a/pkgs/applications/window-managers/tabbed/default.nix b/pkgs/applications/window-managers/tabbed/default.nix
index 2dec3b2241f2..82539b940b8c 100644
--- a/pkgs/applications/window-managers/tabbed/default.nix
+++ b/pkgs/applications/window-managers/tabbed/default.nix
@@ -18,11 +18,11 @@ stdenv.mkDerivation rec {
     export makeFlags="PREFIX=$out"
   '';
  
-  meta = {
+  meta = with stdenv.lib; {
     homepage = http://tools.suckless.org/tabbed;
     description = "Simple generic tabbed fronted to xembed aware applications";
-    license="MIT";
-    maintainers = with stdenv.lib.maintainers; [viric];
-    platforms = with stdenv.lib.platforms; linux;
+    license = with licenses; mit;
+    maintainers = with maintainers; [ viric ];
+    platforms = with platforms; linux;
   };
 }
diff --git a/pkgs/applications/window-managers/vwm/default.nix b/pkgs/applications/window-managers/vwm/default.nix
index 3613bb21ff62..be0a946064b6 100644
--- a/pkgs/applications/window-managers/vwm/default.nix
+++ b/pkgs/applications/window-managers/vwm/default.nix
@@ -22,11 +22,11 @@ stdenv.mkDerivation rec {
  
   buildInputs = [ ncurses pkgconfig glib libviper libpseudo gpm libvterm ];
  
-  meta = {
+  meta = with stdenv.lib; {
     homepage = http://vwm.sourceforge.net/;
     description = "Dynamic window manager for the console";
-    license="GPLv2+";
-    maintainers = with stdenv.lib.maintainers; [viric];
-    platforms = with stdenv.lib.platforms; linux;
+    license = with licenses; gpl2Plus;
+    maintainers = with maintainers; [ viric ];
+    platforms = with platforms; linux;
   };
 }
diff --git a/pkgs/applications/window-managers/wmii/default.nix b/pkgs/applications/window-managers/wmii/default.nix
index a44c54f7b575..e8ecc72a6d30 100644
--- a/pkgs/applications/window-managers/wmii/default.nix
+++ b/pkgs/applications/window-managers/wmii/default.nix
@@ -30,6 +30,6 @@ args: with args; stdenv.mkDerivation {
   ";
   meta = { homepage = "www.suckless.org";
            description = "a really cool window manager which can by driven by keyboard only";
-           license="MIT";
+           license = stdenv.lib.licenses.mit;
          };
 }
diff --git a/pkgs/applications/window-managers/wmii31/default.nix b/pkgs/applications/window-managers/wmii31/default.nix
index dd49cf5ec43e..568be30f1c52 100644
--- a/pkgs/applications/window-managers/wmii31/default.nix
+++ b/pkgs/applications/window-managers/wmii31/default.nix
@@ -30,6 +30,6 @@ args: with args; stdenv.mkDerivation {
   ";
   meta = { homepage = "www.suckless.org";
            description = "One small tool of the wmii window manger to let the user select an item from a list by filtering";
-           license="MIT";
+           license = stdenv.lib.licenses.mit;
          };
 }
diff --git a/pkgs/data/fonts/powerline-fonts/default.nix b/pkgs/data/fonts/powerline-fonts/default.nix
index 2f528a619e72..3ae436179ba1 100644
--- a/pkgs/data/fonts/powerline-fonts/default.nix
+++ b/pkgs/data/fonts/powerline-fonts/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation {
     longDescription = ''
       Pre-patched and adjusted fonts for usage with the Powerline plugin.
     '';
-    license = "asl20 free ofl";
+    license = with licenses; [ asl20 free ofl ];
     platforms = platforms.all;
     maintainer = with maintainers; [ malyn ];
   };
diff --git a/pkgs/data/fonts/terminus-font/default.nix b/pkgs/data/fonts/terminus-font/default.nix
index fa9eb0ac42d5..6dab322b056c 100644
--- a/pkgs/data/fonts/terminus-font/default.nix
+++ b/pkgs/data/fonts/terminus-font/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
     make install fontdir
   '';
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "A clean fixed width font";
     longDescription = ''
       Terminus Font is designed for long (8 and more hours per day) work
@@ -37,8 +37,8 @@ stdenv.mkDerivation rec {
       EGA/VGA-bold for 8x14 and 8x16.
     '';
     homepage = http://www.is-vn.bg/hamster/;
-    license = [ "GPLv2+" ];
-    maintainers = with stdenv.lib.maintainers; [ astsmtl ];
-    platforms = with stdenv.lib.platforms; linux;
+    license = with licenses; [ gpl2Plus ];
+    maintainers = with maintainers; [ astsmtl ];
+    platforms = with platforms; linux;
   };
 }
diff --git a/pkgs/development/compilers/haxe/default.nix b/pkgs/development/compilers/haxe/default.nix
index 8e6828bce468..d9c9f91df6a1 100644
--- a/pkgs/development/compilers/haxe/default.nix
+++ b/pkgs/development/compilers/haxe/default.nix
@@ -32,11 +32,11 @@ stdenv.mkDerivation {
 
   dontStrip = true;
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "Programming language targeting JavaScript, Flash, NekoVM, PHP, C++";
     homepage = http://haxe.org;
-    license = ["GPLv2" "BSD2" /*?*/ ];  # -> docs/license.txt
-    maintainers = [stdenv.lib.maintainers.marcweber];
-    platforms = stdenv.lib.platforms.linux;
+    license = with licenses; [ gpl2 bsd2 /*?*/ ];  # -> docs/license.txt
+    maintainers = [ maintainers.marcweber ];
+    platforms = platforms.linux;
   };
 }
diff --git a/pkgs/development/compilers/ocaml/3.11.2.nix b/pkgs/development/compilers/ocaml/3.11.2.nix
index 195e83e7313b..ce61e5621390 100644
--- a/pkgs/development/compilers/ocaml/3.11.2.nix
+++ b/pkgs/development/compilers/ocaml/3.11.2.nix
@@ -41,9 +41,12 @@ stdenv.mkDerivation rec {
     ln -sv $out/lib/ocaml/caml $out/include/caml
   '';
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = http://caml.inria.fr/ocaml;
-    license = [ "QPL" /* compiler */ "LGPLv2" /* library */ ];
+    license = with licenses; [
+      qpl /* compiler */
+      lgpl2 /* library */
+    ];
     description = "Most popular variant of the Caml language";
 
     longDescription =
@@ -65,7 +68,7 @@ stdenv.mkDerivation rec {
          documentation generator (ocamldoc).
        '';
 
-    platforms = stdenv.lib.platforms.linux ++ stdenv.lib.platforms.darwin;
+    platforms = with platforms; linux ++ darwin;
   };
 
 }
diff --git a/pkgs/development/compilers/ocaml/3.12.1.nix b/pkgs/development/compilers/ocaml/3.12.1.nix
index 6488d94cc08e..e6ed6f4b73ed 100644
--- a/pkgs/development/compilers/ocaml/3.12.1.nix
+++ b/pkgs/development/compilers/ocaml/3.12.1.nix
@@ -34,10 +34,13 @@ stdenv.mkDerivation rec {
     nativeCompilers = useNativeCompilers;
   };
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = http://caml.inria.fr/ocaml;
     branch = "3.12";
-    license = [ "QPL" /* compiler */ "LGPLv2" /* library */ ];
+    license = with licenses; [
+      qpl /* compiler */
+      lgpl2 /* library */
+    ];
     description = "Most popular variant of the Caml language";
 
     longDescription =
@@ -59,7 +62,7 @@ stdenv.mkDerivation rec {
         and a documentation generator (ocamldoc).
       '';
 
-    platforms = stdenv.lib.platforms.linux ++ stdenv.lib.platforms.darwin;
+    platforms = with platforms; linux ++ darwin;
   };
 
 }
diff --git a/pkgs/development/compilers/ocaml/4.00.1.nix b/pkgs/development/compilers/ocaml/4.00.1.nix
index 4e888e143223..f8a7ed920a52 100644
--- a/pkgs/development/compilers/ocaml/4.00.1.nix
+++ b/pkgs/development/compilers/ocaml/4.00.1.nix
@@ -33,10 +33,13 @@ stdenv.mkDerivation rec {
     nativeCompilers = useNativeCompilers;
   };
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = http://caml.inria.fr/ocaml;
     branch = "4.00";
-    license = [ "QPL" /* compiler */ "LGPLv2" /* library */ ];
+    license = with licenses; [
+      qpl /* compiler */
+      lgpl2 /* library */
+    ];
     description = "Most popular variant of the Caml language";
 
     longDescription =
@@ -58,7 +61,7 @@ stdenv.mkDerivation rec {
         and a documentation generator (ocamldoc).
       '';
 
-    platforms = stdenv.lib.platforms.linux ++ stdenv.lib.platforms.darwin;
+    platforms = with platforms; linux ++ darwin;
   };
 
 }
diff --git a/pkgs/development/compilers/ocaml/4.01.0.nix b/pkgs/development/compilers/ocaml/4.01.0.nix
index d178285834ff..1d323ec0cba6 100644
--- a/pkgs/development/compilers/ocaml/4.01.0.nix
+++ b/pkgs/development/compilers/ocaml/4.01.0.nix
@@ -48,10 +48,13 @@ stdenv.mkDerivation rec {
     nativeCompilers = useNativeCompilers;
   };
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = http://caml.inria.fr/ocaml;
     branch = "4.01";
-    license = [ "QPL" /* compiler */ "LGPLv2" /* library */ ];
+    license = with licenses; [
+      qpl /* compiler */
+      lgpl2 /* library */
+    ];
     description = "Most popular variant of the Caml language";
 
     longDescription =
@@ -73,7 +76,7 @@ stdenv.mkDerivation rec {
         and a documentation generator (ocamldoc).
       '';
 
-    platforms = stdenv.lib.platforms.linux ++ stdenv.lib.platforms.darwin;
+    platforms = with platforms; linux ++ darwin;
   };
 
 }
diff --git a/pkgs/development/compilers/ocaml/4.02.1.nix b/pkgs/development/compilers/ocaml/4.02.1.nix
index 18f9d3736506..6f4cce522e46 100644
--- a/pkgs/development/compilers/ocaml/4.02.1.nix
+++ b/pkgs/development/compilers/ocaml/4.02.1.nix
@@ -44,10 +44,13 @@ stdenv.mkDerivation rec {
     nativeCompilers = useNativeCompilers;
   };
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = http://caml.inria.fr/ocaml;
     branch = "4.02";
-    license = [ "QPL" /* compiler */ "LGPLv2" /* library */ ];
+    license = with licenses; [
+      qpl /* compiler */
+      lgpl2 /* library */
+    ];
     description = "Most popular variant of the Caml language";
 
     longDescription =
@@ -69,7 +72,7 @@ stdenv.mkDerivation rec {
         and a documentation generator (ocamldoc).
       '';
 
-    platforms = stdenv.lib.platforms.linux ++ stdenv.lib.platforms.darwin;
+    platforms = with platforms; linux ++ darwin;
   };
 
 }
diff --git a/pkgs/development/compilers/ocaml/ber-metaocaml-003.nix b/pkgs/development/compilers/ocaml/ber-metaocaml-003.nix
index 8b86c805c61f..882af287c045 100644
--- a/pkgs/development/compilers/ocaml/ber-metaocaml-003.nix
+++ b/pkgs/development/compilers/ocaml/ber-metaocaml-003.nix
@@ -55,9 +55,16 @@ stdenv.mkDerivation rec {
     cd ..
   '';
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = "http://okmij.org/ftp/ML/index.html#ber-metaocaml";
-    license = [ "QPL" /* compiler */ "LGPLv2" /* library */ ];
-    description = "A conservative extension of OCaml with the primitive type of code values, and three basic multi-stage expression forms: Brackets, Escape, and Run";
+    license = with licenses; [
+      qpl /* compiler */
+      lgpl2 /* library */
+    ];
+    description = "Conservative extension of OCaml";
+    longDescription = ''
+      A conservative extension of OCaml with the primitive type of code values,
+      and three basic multi-stage expression forms: Brackets, Escape, and Run
+    '';
   };
 }
diff --git a/pkgs/development/haskell-modules/hackage-packages.nix b/pkgs/development/haskell-modules/hackage-packages.nix
index 2f03b30e0ad8..d24e5f44828f 100644
--- a/pkgs/development/haskell-modules/hackage-packages.nix
+++ b/pkgs/development/haskell-modules/hackage-packages.nix
@@ -4726,7 +4726,7 @@ self: {
        sha256 = "1kf638h5gsc8fklhaw2jiad1r0ssgj8zkfmzywp85lrx5z529gky";
        buildDepends = [ base haskell98 ];
        description = "A finite map implementation, derived from the paper: Efficient sets: a balancing act, S. Adams, Journal of functional programming 3(4) Oct 1993, pp553-562";
-       license = "BSD4";
+       license = stdenv.lib.licenses.bsdOriginal;
        hydraPlatforms = stdenv.lib.platforms.none;
      }) {};
 
@@ -21072,7 +21072,7 @@ self: {
          glib Glob gtk gtksourceview2 hint mtl process syb
        ];
        description = "A GTK-based abstract syntax tree viewer for custom languages and parsers";
-       license = "BSD4";
+       license = stdenv.lib.licenses.bsdOriginal;
        hydraPlatforms = stdenv.lib.platforms.none;
      }) {};
 
@@ -21084,7 +21084,7 @@ self: {
        sha256 = "1rqqlngmcdd7i1gww95lyim971w8xv0hjg20h0j8av4y29pjxfyn";
        buildDepends = [ base containers syb ];
        description = "Interfacing between hint and astview";
-       license = "BSD4";
+       license = stdenv.lib.licenses.bsdOriginal;
      }) {};
 
   "async" = callPackage
diff --git a/pkgs/development/interpreters/ruby/ruby-1.9.3.nix b/pkgs/development/interpreters/ruby/ruby-1.9.3.nix
index db807ebbd8b3..5f6540d3ee29 100644
--- a/pkgs/development/interpreters/ruby/ruby-1.9.3.nix
+++ b/pkgs/development/interpreters/ruby/ruby-1.9.3.nix
@@ -101,12 +101,12 @@ stdenv.mkDerivation rec {
     sed -i "s|'--with-baseruby=${baseruby}/bin/ruby'||" $rbConfig
   '';
 
-  meta = {
-    license     = "Ruby";
+  meta = with stdenv.lib; {
+    license     = with licenses; [ ruby ];
     homepage    = "http://www.ruby-lang.org/en/";
     description = "The Ruby language";
-    maintainers = with stdenv.lib.maintainers; [ lovek323 ];
-    platforms   = stdenv.lib.platforms.all;
+    maintainers = with maintainers; [ lovek323 ];
+    platforms   = platforms.all;
   };
 
   passthru = rec {
diff --git a/pkgs/development/libraries/boost-process/default.nix b/pkgs/development/libraries/boost-process/default.nix
index 974654216e01..86cdd08db64c 100644
--- a/pkgs/development/libraries/boost-process/default.nix
+++ b/pkgs/development/libraries/boost-process/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation {
   meta = with stdenv.lib; {
     homepage = "http://www.highscore.de/boost/process0.5/";
     description = "Library to manage system processes";
-    license = "boost-license";
+    license = with licenses; boost;
     platforms = platforms.unix;
     maintainers = with maintainers; [ abbradar ];
   };
diff --git a/pkgs/development/libraries/cairo/default.nix b/pkgs/development/libraries/cairo/default.nix
index 89c791fae020..47a2c63d3283 100644
--- a/pkgs/development/libraries/cairo/default.nix
+++ b/pkgs/development/libraries/cairo/default.nix
@@ -60,7 +60,7 @@ stdenv.mkDerivation rec {
     '' + glib.flattenInclude
     );
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "A 2D graphics library with support for multiple output devices";
 
     longDescription = ''
@@ -77,8 +77,8 @@ stdenv.mkDerivation rec {
 
     homepage = http://cairographics.org/;
 
-    license = [ "LGPLv2+" "MPLv1" ];
+    license = with licenses; [ lgpl2Plus mpl10 ];
 
-    platforms = stdenv.lib.platforms.all;
+    platforms = platforms.all;
   };
 }
diff --git a/pkgs/development/libraries/cairomm/default.nix b/pkgs/development/libraries/cairomm/default.nix
index 990d44dfef8e..b8e9fd7966b0 100644
--- a/pkgs/development/libraries/cairomm/default.nix
+++ b/pkgs/development/libraries/cairomm/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
 
   propagatedBuildInputs = [ cairo x11 fontconfig freetype libsigcxx ];
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "A 2D graphics library with support for multiple output devices";
 
     longDescription = ''
@@ -29,6 +29,6 @@ stdenv.mkDerivation rec {
 
     homepage = http://cairographics.org/;
 
-    license = [ "LGPLv2+" "MPLv1" ];
+    license = with licenses; [ lgpl2Plus mpl10 ];
   };
 }
diff --git a/pkgs/development/libraries/hwloc/default.nix b/pkgs/development/libraries/hwloc/default.nix
index f5a3857ec28a..da658e398eb1 100644
--- a/pkgs/development/libraries/hwloc/default.nix
+++ b/pkgs/development/libraries/hwloc/default.nix
@@ -43,7 +43,7 @@ stdenv.mkDerivation rec {
   # <http://hydra.bordeaux.inria.fr/build/51474/nixlog/1/raw>.
   doCheck = !stdenv.isCygwin;
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "Portable abstraction of hierarchical architectures for high-performance computing";
 
     longDescription = ''
@@ -63,11 +63,11 @@ stdenv.mkDerivation rec {
     '';
 
     # http://www.open-mpi.org/projects/hwloc/license.php
-    license = "revised-BSD";
+    license = with licenses; bsd3;
 
     homepage = http://www.open-mpi.org/projects/hwloc/;
 
     maintainers = [ ];
-    platforms = stdenv.lib.platforms.all;
+    platforms = platforms.all;
   };
 }
diff --git a/pkgs/development/libraries/java/rhino/default.nix b/pkgs/development/libraries/java/rhino/default.nix
index 34aaded7cb44..74aa8c9ba162 100644
--- a/pkgs/development/libraries/java/rhino/default.nix
+++ b/pkgs/development/libraries/java/rhino/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation {
       cp -v *.jar "$out/share/java"
     '';
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "An implementation of JavaScript written in Java";
 
     longDescription =
@@ -52,6 +52,6 @@ stdenv.mkDerivation {
 
     homepage = http://www.mozilla.org/rhino/;
 
-    license = [ "MPLv1.1" /* or */ "GPLv2+" ];
+    license = with licenses; [ mpl11 /* or */ gpl2Plus ];
   };
 }
diff --git a/pkgs/development/libraries/libpseudo/default.nix b/pkgs/development/libraries/libpseudo/default.nix
index 29a8c459c34c..8a7054db20a0 100644
--- a/pkgs/development/libraries/libpseudo/default.nix
+++ b/pkgs/development/libraries/libpseudo/default.nix
@@ -16,11 +16,11 @@ stdenv.mkDerivation rec {
     mkdir -p $out/lib
   '';
 
-  buildInputs = [pkgconfig glib ncurses];
+  buildInputs = [ pkgconfig glib ncurses ];
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = http://libpseudo.sourceforge.net/;
     description = "Simple, thread-safe messaging between threads";
-    license="GPLv2+";
+    license = with licenses; gpl2Plus;
   };
 }
diff --git a/pkgs/development/libraries/libviper/default.nix b/pkgs/development/libraries/libviper/default.nix
index f82581b10977..1dcd578da293 100644
--- a/pkgs/development/libraries/libviper/default.nix
+++ b/pkgs/development/libraries/libviper/default.nix
@@ -18,9 +18,9 @@ stdenv.mkDerivation rec {
 
   buildInputs = [pkgconfig glib ncurses gpm];
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = http://libviper.sourceforge.net/;
     description = "Simple window creation and management facilities for the console";
-    license="GPLv2+";
+    license = with licenses; gpl2Plus;
   };
 }
diff --git a/pkgs/development/libraries/libvterm/default.nix b/pkgs/development/libraries/libvterm/default.nix
index cc2fd268ae6b..b52db39042f0 100644
--- a/pkgs/development/libraries/libvterm/default.nix
+++ b/pkgs/development/libraries/libvterm/default.nix
@@ -17,12 +17,12 @@ stdenv.mkDerivation rec {
     mkdir -p $out/lib
   '';
 
-  buildInputs = [pkgconfig glib ncurses];
+  buildInputs = [ pkgconfig glib ncurses ];
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = http://libvterm.sourceforge.net/;
     description = "Terminal emulator library to mimic both vt100 and rxvt";
-    license = "GPLv2+";
-    platforms = stdenv.lib.platforms.linux;
+    license = with licenses; gpl2Plus;
+    platforms = platforms.linux;
   };
 }
diff --git a/pkgs/development/libraries/pkcs11helper/default.nix b/pkgs/development/libraries/pkcs11helper/default.nix
index 5443df89704d..c4f0ad16fb76 100644
--- a/pkgs/development/libraries/pkcs11helper/default.nix
+++ b/pkgs/development/libraries/pkcs11helper/default.nix
@@ -16,9 +16,9 @@ stdenv.mkDerivation rec {
   
   buildInputs = [ pkgconfig openssl autoconf automake libtool ];
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = https://www.opensc-project.org/opensc/wiki/pkcs11-helper;
-    license = [ "BSD" "GPLv2" ];
+    license = with licenses; [ "BSD" gpl2 ];
     description = "Library that simplifies the interaction with PKCS#11 providers";
   };
 }
diff --git a/pkgs/development/libraries/quesoglc/default.nix b/pkgs/development/libraries/quesoglc/default.nix
index 3d2f098267d3..928095a4e29b 100644
--- a/pkgs/development/libraries/quesoglc/default.nix
+++ b/pkgs/development/libraries/quesoglc/default.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
   };
   buildInputs = [ mesa glew freetype fontconfig fribidi libX11 ];
   # FIXME: Configure fails to use system glew.
-  meta = {
+  meta = with stdenv.lib; {
     description = "A free implementation of the OpenGL Character Renderer";
     longDescription = ''
       QuesoGLC is a free (as in free speech) implementation of the OpenGL
@@ -18,8 +18,8 @@ stdenv.mkDerivation rec {
       platform that supports both FreeType and the OpenGL API.
     '';
     homepage = http://quesoglc.sourceforge.net/;
-    license = [ "LGPLv2.1+" ];
-    maintainers = with stdenv.lib.maintainers; [ astsmtl ];
-    platforms = with stdenv.lib.platforms; linux;
+    license = with licenses; [ lgpl21Plus ];
+    maintainers = with maintainers; [ astsmtl ];
+    platforms = with platforms; linux;
   };
 }
diff --git a/pkgs/development/libraries/rabbitmq-java-client/default.nix b/pkgs/development/libraries/rabbitmq-java-client/default.nix
index 2183aa83e20e..a1708ba59c35 100644
--- a/pkgs/development/libraries/rabbitmq-java-client/default.nix
+++ b/pkgs/development/libraries/rabbitmq-java-client/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "RabbitMQ Java client library which allows Java code to interface to AMQP servers";
     homepage = http://www.rabbitmq.com/java-client.html;
-    license = [ "MPLv1.1" "GPLv2" ];
+    license = with licenses; [ mpl11 gpl2 ];
     platforms = platforms.linux;
   };
 }
diff --git a/pkgs/development/libraries/science/math/liblapack/3.5.0.nix b/pkgs/development/libraries/science/math/liblapack/3.5.0.nix
index 0b4badf26e7a..3427bf1c4e98 100644
--- a/pkgs/development/libraries/science/math/liblapack/3.5.0.nix
+++ b/pkgs/development/libraries/science/math/liblapack/3.5.0.nix
@@ -37,13 +37,13 @@ stdenv.mkDerivation rec {
     blas = atlas;
   };
 
-  meta = {
+  meta = with stdenv.lib; {
     inherit version;
     description = "Linear Algebra PACKage";
     homepage = "http://www.netlib.org/lapack/";
-    license = "revised-BSD";
+    license = with licenses; bsd3;
 
-    platforms = stdenv.lib.platforms.all;
-    maintainers = [ stdenv.lib.maintainers.simons ];
+    platforms = platforms.all;
+    maintainers = [ maintainers.simons ];
   };
 }
diff --git a/pkgs/development/libraries/science/math/liblapack/default.nix b/pkgs/development/libraries/science/math/liblapack/default.nix
index 9f4f43311a47..cbe03b8eb632 100644
--- a/pkgs/development/libraries/science/math/liblapack/default.nix
+++ b/pkgs/development/libraries/science/math/liblapack/default.nix
@@ -37,13 +37,13 @@ stdenv.mkDerivation rec {
     blas = atlas;
   };
 
-  meta = {
+  meta = with stdenv.lib; {
     inherit version;
     description = "Linear Algebra PACKage";
     homepage = "http://www.netlib.org/lapack/";
-    license = "revised-BSD";
+    license = with licenses; bsd3;
 
-    platforms = stdenv.lib.platforms.all;
-    maintainers = [ stdenv.lib.maintainers.simons ];
+    platforms = platforms.all;
+    maintainers = [ maintainers.simons ];
   };
 }
diff --git a/pkgs/development/libraries/zziplib/default.nix b/pkgs/development/libraries/zziplib/default.nix
index dcfaafc2b7d8..1e474e722ffa 100644
--- a/pkgs/development/libraries/zziplib/default.nix
+++ b/pkgs/development/libraries/zziplib/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
 
   doCheck = true;
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "Library to extract data from files archived in a zip file";
 
     longDescription = ''
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
       zip/unzip tools.
     '';
 
-    license = [ "LGPLv2+" "MPLv1.1" ];
+    license = with licenses; [ lgpl2Plus mpl11 ];
 
     homepage = http://zziplib.sourceforge.net/;
 
diff --git a/pkgs/development/ocaml-modules/menhir/default.nix b/pkgs/development/ocaml-modules/menhir/default.nix
index d5db6e9c7e0c..0a73f8aa04a7 100644
--- a/pkgs/development/ocaml-modules/menhir/default.nix
+++ b/pkgs/development/ocaml-modules/menhir/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation {
     export PREFIX=$out
   '';
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = http://pauillac.inria.fr/~fpottier/menhir/;
     description = "A LR(1) parser generator for OCaml";
     longDescription = ''
@@ -41,10 +41,11 @@ stdenv.mkDerivation {
       to OCaml code.  Menhir was designed and implemented by François Pottier
       and Yann Régis-Gianas.
     '';
-    license = [ "QPL" /* generator */ "LGPLv2" /* library */ ];
-    platforms = ocaml.meta.platforms;
-    maintainers = [
-      stdenv.lib.maintainers.z77z
+    license = with licenses; [
+      qpl /* generator */
+      lgpl2 /* library */
     ];
+    platforms = ocaml.meta.platforms;
+    maintainers = with maintainers; [ z77z ];
   };
 }
diff --git a/pkgs/development/python-modules/blivet/default.nix b/pkgs/development/python-modules/blivet/default.nix
index f84c836c056f..3065af0fd15f 100644
--- a/pkgs/development/python-modules/blivet/default.nix
+++ b/pkgs/development/python-modules/blivet/default.nix
@@ -39,10 +39,10 @@ in buildPythonPackage rec {
   # Tests are in <nixos/tests/blivet.nix>.
   doCheck = false;
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = "https://fedoraproject.org/wiki/Blivet";
     description = "Module for management of a system's storage configuration";
-    license = [ "GPLv2+" "LGPLv2.1+" ];
-    platforms = stdenv.lib.platforms.linux;
+    license = with licenses; [ gpl2Plus lgpl21Plus ];
+    platforms = platforms.linux;
   };
 }
diff --git a/pkgs/development/tools/misc/autogen/default.nix b/pkgs/development/tools/misc/autogen/default.nix
index 48533f553fe4..01c5fd7dcbad 100644
--- a/pkgs/development/tools/misc/autogen/default.nix
+++ b/pkgs/development/tools/misc/autogen/default.nix
@@ -24,7 +24,7 @@ let version = "5.18"; in
 
     #doCheck = true; # 2 tests fail because of missing /dev/tty
 
-    meta = {
+    meta = with stdenv.lib; {
       description = "Automated text and program generation tool";
 
       longDescription = ''
@@ -46,7 +46,7 @@ let version = "5.18"; in
         documentation of program options.
       '';
 
-      license = ["GPLv3+" "LGPLv3+" ];
+      license = with licenses; [ gpl3Plus lgpl3Plus ];
 
       homepage = http://www.gnu.org/software/autogen/;
 
diff --git a/pkgs/development/tools/sauce-connect/default.nix b/pkgs/development/tools/sauce-connect/default.nix
index e41b45dff68f..99e54e86a56e 100644
--- a/pkgs/development/tools/sauce-connect/default.nix
+++ b/pkgs/development/tools/sauce-connect/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "A secure tunneling app for executing tests securely when testing behind firewalls";
-    license = "unfree";
+    license = with licenses; unfree;
     homepage = https://docs.saucelabs.com/reference/sauce-connect/;
     maintainers = with maintainers; [offline];
     platforms = with platforms; platforms.linux;
diff --git a/pkgs/games/0ad/default.nix b/pkgs/games/0ad/default.nix
index bbcc6f11d1dc..5a0bdcd70a7e 100644
--- a/pkgs/games/0ad/default.nix
+++ b/pkgs/games/0ad/default.nix
@@ -112,10 +112,13 @@ stdenv.mkDerivation rec {
     done <build/resources/0ad.desktop >"$out"/share/applications/0ad.desktop
   '';
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "A free, open-source game of ancient warfare";
     homepage = "http://wildfiregames.com/0ad/";
-    license = [ "GPLv2" "LGPLv2.1" "MIT" "CC BY-SA 3.0" "zlib" ];
+    license = with licenses; [
+      gpl2 lgpl21 mit cc-by-sa-30
+      licenses.zlib # otherwise masked by pkgs.zlib
+    ];
     platforms = [ "x86_64-linux" "i686-linux" ];
   };
 }
diff --git a/pkgs/games/alienarena/default.nix b/pkgs/games/alienarena/default.nix
index b3c2dd14718e..485b52d3d088 100644
--- a/pkgs/games/alienarena/default.nix
+++ b/pkgs/games/alienarena/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
       --replace libGL.so.1 ${mesa}/lib/libGL.so.1
   '';
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "A free, stand-alone first-person shooter computer game";
     longDescription = ''
       Do you like old school deathmatch with modern features? How
@@ -31,9 +31,9 @@ stdenv.mkDerivation rec {
     '';
     homepage = http://red.planetarena.org;
     # Engine is under GPLv2, everything else is under
-    license = [ "unfree-redistributable" ];
-    maintainers = with stdenv.lib.maintainers; [ astsmtl ];
-    platforms = stdenv.lib.platforms.linux;
+    license = with licenses; unfreeRedistributable;
+    maintainers = with maintainers; [ astsmtl ];
+    platforms = platforms.linux;
     hydraPlatforms = [];
   };
 }
diff --git a/pkgs/games/gsb/default.nix b/pkgs/games/gsb/default.nix
index 642a86ac4de2..a0a25a2ff4b4 100644
--- a/pkgs/games/gsb/default.nix
+++ b/pkgs/games/gsb/default.nix
@@ -54,7 +54,7 @@ stdenv.mkDerivation rec {
     chmod +x $out/bin/GSB
   '';
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "Gratuitous Space Battles";
     longDescription = ''
       a strategy / management / simulation game that does away with all the
@@ -66,8 +66,8 @@ stdenv.mkDerivation rec {
       battle (or at least blow to bits in aesthetically pleasing ways).
     '';
     homepage = http://www.positech.co.uk/gratuitousspacebattles/index.html;
-    license = [ "unfree" ];
-    maintainers = with stdenv.lib.maintainers; [ jcumming ];
+    license = with licenses; unfree;
+    maintainers = with maintainers; [ jcumming ];
     platforms = [ "x86_64-linux" "i686-linux" ] ;
   };
 
diff --git a/pkgs/games/tremulous/default.nix b/pkgs/games/tremulous/default.nix
index 3fcbff42527f..fd80eecfd55c 100644
--- a/pkgs/games/tremulous/default.nix
+++ b/pkgs/games/tremulous/default.nix
@@ -57,7 +57,7 @@ stdenv.mkDerivation rec {
     done
   '';
   dontPatchELF = true;
-  meta = {
+  meta = with stdenv.lib; {
     description = "A game that blends a team based FPS with elements of an RTS";
     longDescription = ''
       Tremulous is a free, open source game that blends a team based FPS with
@@ -70,9 +70,12 @@ stdenv.mkDerivation rec {
       degree), healing functions and much more...
     '';
     homepage = http://www.tremulous.net;
-    license = [ "GPLv2" ];  # media under cc by-sa 2.5
-    maintainers = with stdenv.lib.maintainers; [ astsmtl ];
-    platforms = with stdenv.lib.platforms; linux;
+    license = with licenses; [
+      gpl2
+      cc-by-sa-25 /* media */
+    ];
+    maintainers = with maintainers; [ astsmtl ];
+    platforms = with platforms; linux;
     broken = true;
   };
 }
diff --git a/pkgs/games/urbanterror/default.nix b/pkgs/games/urbanterror/default.nix
index 6b4c6e68bacc..925362be1c58 100644
--- a/pkgs/games/urbanterror/default.nix
+++ b/pkgs/games/urbanterror/default.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
     cur_rpath=$(patchelf --print-rpath $p)
     patchelf --set-rpath $cur_rpath:${mesa}/lib $p
   '';
-  meta = {
+  meta = with stdenv.lib; {
     description = "A multiplayer tactical FPS on top of Quake 3 engine";
     longDescription = ''
       Urban Terror is a free multiplayer first person shooter developed by
@@ -57,9 +57,9 @@ stdenv.mkDerivation rec {
       realism". This results in a very unique, enjoyable and addictive game.
     '';
     homepage = http://www.urbanterror.net;
-    license = [ "unfree-redistributable" ];
-    maintainers = with stdenv.lib.maintainers; [ astsmtl ];
-    platforms = stdenv.lib.platforms.linux;
+    license = with licenses; unfreeRedistributable;
+    maintainers = with maintainers; [ astsmtl ];
+    platforms = platforms.linux;
     hydraPlatforms = [];
   };
 }
diff --git a/pkgs/games/vessel/default.nix b/pkgs/games/vessel/default.nix
index cab6a269f93a..4a845a3a17e1 100644
--- a/pkgs/games/vessel/default.nix
+++ b/pkgs/games/vessel/default.nix
@@ -67,7 +67,7 @@ stdenv.mkDerivation rec {
     chmod +x $out/bin/Vessel
   '';
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "A fluid physics based puzzle game";
     longDescription = ''
       Living liquid machines have overrun this world of unstoppable progress,
@@ -76,8 +76,8 @@ stdenv.mkDerivation rec {
       to life, and all the consequences that ensue.
     '';
     homepage = http://www.strangeloopgames.com;
-    license = [ "unfree" ];
-    maintainers = with stdenv.lib.maintainers; [ jcumming ];
+    license = with licenses; unfree;
+    maintainers = with maintainers; [ jcumming ];
   };
 
 }
diff --git a/pkgs/games/warsow/default.nix b/pkgs/games/warsow/default.nix
index 84d15efb810f..83c9b5d52fa5 100644
--- a/pkgs/games/warsow/default.nix
+++ b/pkgs/games/warsow/default.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation rec {
     cur_rpath=$(patchelf --print-rpath $p)
     patchelf --set-rpath $cur_rpath:${mesa}/lib $p
   '';
-  meta = {
+  meta = with stdenv.lib; {
     description = "Multiplayer FPS game designed for competitive gaming";
     longDescription = ''
       Set in a futuristic cartoon-like world where rocketlauncher-wielding
@@ -56,8 +56,8 @@ stdenv.mkDerivation rec {
     '';
     homepage = http://www.warsow.net;
     # Engine is under GPLv2, everything else is under
-    license = [ "unfree-redistributable" ];
-    maintainers = with stdenv.lib.maintainers; [ astsmtl ];
-    platforms = with stdenv.lib.platforms; linux;
+    license = with licenses; unfreeRedistributable;
+    maintainers = with maintainers; [ astsmtl ];
+    platforms = with platforms; linux;
   };
 }
diff --git a/pkgs/games/worldofgoo/default.nix b/pkgs/games/worldofgoo/default.nix
index 8df3ef1e8403..2382da034534 100644
--- a/pkgs/games/worldofgoo/default.nix
+++ b/pkgs/games/worldofgoo/default.nix
@@ -67,7 +67,7 @@ stdenv.mkDerivation rec {
     chmod +x $out/bin/WorldofGoo
   '';
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "A physics based puzzle game";
     longDescription = ''
       World of Goo is a physics based puzzle / construction game. The millions of Goo
@@ -75,8 +75,8 @@ stdenv.mkDerivation rec {
       game, or that they are extremely delicious.
     '';
     homepage = http://worldofgoo.com;
-    license = [ "unfree" ];
-    maintainers = with stdenv.lib.maintainers; [ jcumming ];
+    license = with licenses; unfree;
+    maintainers = with maintainers; [ jcumming ];
   };
 
 }
diff --git a/pkgs/os-specific/linux/hal-flash/default.nix b/pkgs/os-specific/linux/hal-flash/default.nix
index f61318e1b6bb..c385971104dd 100644
--- a/pkgs/os-specific/linux/hal-flash/default.nix
+++ b/pkgs/os-specific/linux/hal-flash/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation {
         package.  Provides the minimum necessary functionality to enable
         libflashplayer.so/libadobecp.so to play back DRM content.
       '';
-    license = "afl21 gpl2";
+    license = with licenses; [ afl21 gpl2 ];
     maintainers = with maintainers; [ malyn ];
     platforms = platforms.linux;
   };
diff --git a/pkgs/servers/dico/default.nix b/pkgs/servers/dico/default.nix
index f345fe71a34f..ebabb1091eea 100644
--- a/pkgs/servers/dico/default.nix
+++ b/pkgs/servers/dico/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "Flexible dictionary server and client implementing RFC 2229";
     homepage    = http://www.gnu.org/software/dico/;
-    license     = "GPLv3+";
+    license     = with licenses; gpl3Plus;
     maintainers = with maintainers; [ lovek323 ];
     platforms   = platforms.unix;
 
diff --git a/pkgs/tools/backup/bacula/default.nix b/pkgs/tools/backup/bacula/default.nix
index 4882097c91a7..fdc52eabd4b5 100644
--- a/pkgs/tools/backup/bacula/default.nix
+++ b/pkgs/tools/backup/bacula/default.nix
@@ -25,8 +25,8 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "Enterprise ready, Network Backup Tool";
     homepage    = http://bacula.org/;
-    license     = "GPLv2";
+    license     = with licenses; gpl2;
     maintainers = with maintainers; [ iElectric lovek323 ];
-    platforms   = stdenv.lib.platforms.all;
+    platforms   = platforms.all;
   };
 }
diff --git a/pkgs/tools/compression/xz/default.nix b/pkgs/tools/compression/xz/default.nix
index 69c14023701b..6a9d4582dff2 100644
--- a/pkgs/tools/compression/xz/default.nix
+++ b/pkgs/tools/compression/xz/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
 
   postInstall = "rm -rf $out/share/doc";
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = http://tukaani.org/xz/;
     description = "XZ, general-purpose data compression software, successor of LZMA";
 
@@ -33,8 +33,8 @@ stdenv.mkDerivation rec {
          bzip2.
       '';
 
-    license = [ "GPLv2+" "LGPLv2.1+" ];
-    maintainers = with stdenv.lib.maintainers; [ sander ];
-    platforms = stdenv.lib.platforms.all;
+    license = with licenses; [ gpl2Plus lgpl21Plus ];
+    maintainers = with maintainers; [ sander ];
+    platforms = platforms.all;
   };
 }
diff --git a/pkgs/tools/filesystems/nixpart/0.4/blivet.nix b/pkgs/tools/filesystems/nixpart/0.4/blivet.nix
index 44333b519cbe..fd7d59774b26 100644
--- a/pkgs/tools/filesystems/nixpart/0.4/blivet.nix
+++ b/pkgs/tools/filesystems/nixpart/0.4/blivet.nix
@@ -45,10 +45,10 @@ buildPythonPackage rec {
   # tests are currently _heavily_ broken upstream
   doCheck = false;
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = "https://fedoraproject.org/wiki/Blivet";
     description = "Module for management of a system's storage configuration";
-    license = [ "GPLv2+" "LGPLv2.1+" ];
-    platforms = stdenv.lib.platforms.linux;
+    license = with licenses; [ gpl2Plus lgpl21Plus ];
+    platforms = platforms.linux;
   };
 }
diff --git a/pkgs/tools/filesystems/s3fs/default.nix b/pkgs/tools/filesystems/s3fs/default.nix
index c39f5cba775b..f081f8121699 100644
--- a/pkgs/tools/filesystems/s3fs/default.nix
+++ b/pkgs/tools/filesystems/s3fs/default.nix
@@ -9,8 +9,8 @@ stdenv.mkDerivation {
   preConfigure = "./autogen.sh";
   buildInputs = [ autoconf automake pkgconfig curl openssl libxml2 fuse ];
   
-  meta = {
+  meta = with stdenv.lib; {
     description = "Mount an S3 bucket as filesystem through FUSE";
-    license = "GPLv2";
+    license = with licenses; gpl2;
   };
 }
diff --git a/pkgs/tools/networking/isync/default.nix b/pkgs/tools/networking/isync/default.nix
index 47efe53c0a97..f16698ef3cd9 100644
--- a/pkgs/tools/networking/isync/default.nix
+++ b/pkgs/tools/networking/isync/default.nix
@@ -10,12 +10,12 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ openssl pkgconfig db cyrus_sasl ];
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = http://isync.sourceforge.net/;
     description = "Free IMAP and MailDir mailbox synchronizer";
-    license = [ "GPLv2+" ];
+    license = with licenses; [ gpl2Plus ];
 
-    maintainers = with stdenv.lib.maintainers; [ the-kenny viric ];
-    platforms = stdenv.lib.platforms.unix;
+    maintainers = with maintainers; [ the-kenny viric ];
+    platforms = platforms.unix;
   };
 }
diff --git a/pkgs/tools/networking/maildrop/default.nix b/pkgs/tools/networking/maildrop/default.nix
index 991d75c66ae4..cf9c3a4fa4e0 100644
--- a/pkgs/tools/networking/maildrop/default.nix
+++ b/pkgs/tools/networking/maildrop/default.nix
@@ -12,9 +12,9 @@ stdenv.mkDerivation rec {
 
   patches = [ ./maildrop.configure.hack.patch ]; # for building in chroot
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = http://www.courier-mta.org/maildrop/;
     description = "Mail filter/mail delivery agent that is used by the Courier Mail Server";
-    license = [ "GPLv3" ];
+    license = with licenses; gpl3;
   };
 }
diff --git a/pkgs/tools/networking/mailutils/default.nix b/pkgs/tools/networking/mailutils/default.nix
index 0b57a752a375..cbca408f0842 100644
--- a/pkgs/tools/networking/mailutils/default.nix
+++ b/pkgs/tools/networking/mailutils/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   # Tests fail since gcc 4.8
   doCheck = false;
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "Rich and powerful protocol-independent mail framework";
 
     longDescription = ''
@@ -46,13 +46,16 @@ stdenv.mkDerivation rec {
       message handling system.
     '';
 
-    license = [ "LGPLv3+" /* libraries */  "GPLv3+" /* tools */ ];
+    license = with licenses; [
+      lgpl3Plus /* libraries */
+      gpl3Plus /* tools */
+    ];
 
     maintainers = [ ];
 
     homepage = http://www.gnu.org/software/mailutils/;
 
     # Some of the dependencies fail to build on {cyg,dar}win.
-    platforms = stdenv.lib.platforms.gnu;
+    platforms = platforms.gnu;
   };
 }
diff --git a/pkgs/tools/networking/nss-pam-ldapd/default.nix b/pkgs/tools/networking/nss-pam-ldapd/default.nix
index a63ec2a3d680..2368470b84d7 100644
--- a/pkgs/tools/networking/nss-pam-ldapd/default.nix
+++ b/pkgs/tools/networking/nss-pam-ldapd/default.nix
@@ -26,9 +26,9 @@ stdenv.mkDerivation rec {
     wrapProgram $out/sbin/nslcd --prefix LD_LIBRARY_PATH ":" $out/lib
   '';
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "LDAP identity and authentication for NSS/PAM";
     homepage = http://arthurdejong.org/nss-pam-ldapd/;
-    license = [ "GPLv21" ];
+    license = with licenses; [ lgpl21 ];
   };
 }
diff --git a/pkgs/tools/networking/wicd/default.nix b/pkgs/tools/networking/wicd/default.nix
index 55a99dd2729a..7f6addc86294 100644
--- a/pkgs/tools/networking/wicd/default.nix
+++ b/pkgs/tools/networking/wicd/default.nix
@@ -100,7 +100,7 @@ stdenv.mkDerivation rec {
     echo "wpa2-ttls" >> "$out/etc/encryption/templates/active"
   '';
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = http://wicd.net/;
     description = "A wiredless and wired network manager";
     longDescription=''
@@ -112,7 +112,7 @@ stdenv.mkDerivation rec {
       encryption types, such as WPA and WEP. Wicd will automatically
       connect at startup to any preferred network within range.
     '';
-    maintainers = [ stdenv.lib.maintainers.roconnor ];
-    license="GPLv2";
+    maintainers = [ maintainers.roconnor ];
+    license = with licenses; gpl2;
   };
 }
diff --git a/pkgs/tools/system/bootchart/default.nix b/pkgs/tools/system/bootchart/default.nix
index bb3f9d72e828..1e2f74e1b0a2 100644
--- a/pkgs/tools/system/bootchart/default.nix
+++ b/pkgs/tools/system/bootchart/default.nix
@@ -28,10 +28,10 @@ stdenv.mkDerivation rec {
     chmod +x $out/sbin/bootchartd
   '';
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = http://www.bootchart.org/;
     description = "Performance analysis and visualization of the GNU/Linux boot process";
-    license="GPLv2+";
+    license = with licenses; gpl2Plus;
   };
 
 }
diff --git a/pkgs/tools/system/dog/default.nix b/pkgs/tools/system/dog/default.nix
index 9c98da6ac85b..fd911142c219 100644
--- a/pkgs/tools/system/dog/default.nix
+++ b/pkgs/tools/system/dog/default.nix
@@ -15,11 +15,11 @@ stdenv.mkDerivation rec {
     cp dog $out/bin
   '';
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = "http://lwn.net/Articles/421072/";
-    description = "a cat replacement";
-    license="GPLv2+";
-    maintainers = with stdenv.lib.maintainers; [qknight];
-    platforms = with stdenv.lib.platforms; all;
+    description = "cat replacement";
+    license = with licenses; gpl2Plus;
+    maintainers = with maintainers; [ qknight ];
+    platforms = with platforms; all;
   };
 }
diff --git a/pkgs/tools/system/tm/default.nix b/pkgs/tools/system/tm/default.nix
index 0a4c1e58fc54..a1397cb6214f 100644
--- a/pkgs/tools/system/tm/default.nix
+++ b/pkgs/tools/system/tm/default.nix
@@ -17,12 +17,12 @@ stdenv.mkDerivation {
     sha256 = "3b389bc03b6964ad5ffa57a344b891fdbcf7c9b2604adda723a863f83657c4a0";
   };
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = "http://vicerveza.homeunix.net/~viric/soft/tm";
     description = "terminal mixer - multiplexer for the i/o of terminal applications";
-    license="GPLv2";
-    maintainers = with stdenv.lib.maintainers; [viric];
-    platforms = with stdenv.lib.platforms; all;
+    license = with licenses; gpl2;
+    maintainers = with maintainers; [ viric ];
+    platforms = with platforms; all;
   };
 
 }
diff --git a/pkgs/tools/system/ts/default.nix b/pkgs/tools/system/ts/default.nix
index 6d1c6ad5e1ff..6cd69a746f0e 100644
--- a/pkgs/tools/system/ts/default.nix
+++ b/pkgs/tools/system/ts/default.nix
@@ -20,11 +20,11 @@ stdenv.mkDerivation rec {
     sha256 = "042r9a09300v4fdrw4r60g5xi25v5m6g12kvvr6pcsm9qnfqyqqs";
   };
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = "http://vicerveza.homeunix.net/~viric/soft/ts";
     description = "task spooler - batch queue";
-    license="GPLv2";
-    maintainers = with stdenv.lib.maintainers; [viric];
-    platforms = with stdenv.lib.platforms; all;
+    license = with licenses; gpl2;
+    maintainers = with maintainers; [ viric ];
+    platforms = with platforms; all;
   };
 }
diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index 56bffa0bc51b..e6556b0898ae 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -33,12 +33,12 @@ let self = _self // overrides; _self = with self; {
     # use gnused so that the preCheck command passes
     buildInputs = stdenv.lib.optional stdenv.isDarwin [ gnused ];
     propagatedBuildInputs = [ FileNext ];
-    meta = {
+    meta = with stdenv.lib; {
       description = "A grep-like tool tailored to working with large trees of source code";
       homepage    = http://betterthangrep.com/;
-      license     = "free";  # Artistic 2.0
+      license     = with licenses; artistic2;
       maintainers = with maintainers; [ lovek323 ];
-      platforms   = stdenv.lib.platforms.unix;
+      platforms   = platforms.unix;
     };
     # tests fails on nixos and hydra because of different purity issues
     doCheck = false;
@@ -3721,9 +3721,9 @@ let self = _self // overrides; _self = with self; {
     propagatedBuildInputs =
       [ ClassLoad ListMoreUtils ModulePluggable Moose MooseXParamsValidate MooseXSemiAffordanceAccessor namespaceautoclean ]
       ++ stdenv.lib.optional stdenv.isLinux LinuxInotify2;
-    meta = {
+    meta = with stdenv.lib; {
       description = "Watch for changes to files, cross-platform style";
-      license = "artistic_2";
+      license = with licenses; artistic2;
     };
   };
 
@@ -3983,10 +3983,10 @@ let self = _self // overrides; _self = with self; {
       sha256 = "0mxfhi1ndckj4w7fw20rwy6ymalg2yncnp9xn0v2bnk5ibqj439w";
     };
     propagatedBuildInputs = [ CryptSSLeay HTMLTableExtract HTMLTree HTTPMessage LWP DateCalc JSON ];
-    meta = {
+    meta = with stdenv.lib; {
       homepage = http://finance-quote.sourceforge.net/;
       description = "Get stock and mutual fund quotes from various exchanges";
-      license = "gpl";
+      license = with licenses; gpl2;
     };
   };
 
@@ -4158,9 +4158,9 @@ let self = _self // overrides; _self = with self; {
     buildInputs = [ pkgs.graphviz ];
     propagatedBuildInputs = [ IPCRun TestMore ];
 
-    meta = {
+    meta = with stdenv.lib; {
       description = "Perl interface to the GraphViz graphing tool";
-      license = [ "Artistic" ];
+      license = with licenses; artistic2;
       maintainers = [ ];
     };
   };
@@ -4861,7 +4861,7 @@ let self = _self // overrides; _self = with self; {
       sha256 = "1f37pi7a6fcphp0kkhj7yr9b5c95m2wvy5jcwjq1xdiq74gdi16c";
     };
 
-    meta = {
+    meta = with stdenv.lib; {
       description = "ExifTool, a tool to read, write and edit EXIF meta information";
       homepage = http://www.sno.phy.queensu.ca/~phil/exiftool/;
 
@@ -4877,10 +4877,10 @@ let self = _self // overrides; _self = with self; {
         Sigma/Foveon and Sony.
       '';
 
-      license = [ "GPLv1+" /* or */ "Artistic" ];
+      license = with licenses; [ gpl1Plus /* or */ artistic2 ];
 
       maintainers = [ ];
-      platforms = stdenv.lib.platforms.unix;
+      platforms = platforms.unix;
     };
   };
 
@@ -7810,10 +7810,10 @@ let self = _self // overrides; _self = with self; {
       sha256 = "c5da0e390b58655934e1df57937d29d7de13b99f5638fe44833832a5b39c8aa5";
     };
     propagatedBuildInputs = [ FileFindIterator IPCRun constantdefer libintlperl ];
-    meta = {
+    meta = with stdenv.lib; {
       homepage = http://user42.tuxfamily.org/podlinkcheck/index.html;
       description = "Check POD L<> link references";
-      license = "gpl";
+      license = with licenses; gpl3Plus;
     };
   };
 
@@ -7921,9 +7921,9 @@ let self = _self // overrides; _self = with self; {
       url = mirror://cpan/authors/id/A/AB/ABIGAIL/Regexp-Common-2013031301.tar.gz;
       sha256 = "729a8198d264aa64ecbb233ff990507f97fbb66bda746b95f3286f50f5f25c84";
     };
-    meta = {
+    meta = with stdenv.lib; {
       description = "Provide commonly requested regular expressions";
-      license = "mit";
+      license = with licenses; mit;
     };
   };
 
@@ -8433,9 +8433,9 @@ let self = _self // overrides; _self = with self; {
       sha256 = "0mlwm0rirv46gj4h072q8gdync5zxxsxy8p028gdyrhczl942dc3";
     };
     propagatedBuildInputs = [ ParamsUtil SubExporter ];
-    meta = {
+    meta = with stdenv.lib; {
       description = "Build sprintf-like functions of your own";
-      license = "gpl";
+      license = with licenses; gpl2;
     };
   };
 
@@ -9333,11 +9333,11 @@ let self = _self // overrides; _self = with self; {
     };
     buildInputs = [ ClassInspector TestUnitLite ];
     propagatedBuildInputs = [ ExceptionBase FatalException Moose namespaceclean TestAssert ];
-    meta = {
+    meta = with stdenv.lib; {
       description = "Simulating other classes";
-      license = "lgpl";
+      license = with licenses; lgpl2Plus;
       maintainers = with maintainers; [ ocharles ];
-      platforms   = stdenv.lib.platforms.unix;
+      platforms   = platforms.unix;
     };
   };
 
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index b33448fa9442..7d6678974e03 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -7437,12 +7437,12 @@ let
     meta = {
       homepage = http://namebench.googlecode.com/;
       description = "Find fastest DNS servers available";
-      license = [
-        "Apache-2.0"
+      license = with licenses; [
+        asl20
         # third-party program licenses (embedded in the sources)
         "LGPL" # Crystal_Clear
-        "free" # dns
-        "Apache-2.0" # graphy
+        free # dns
+        asl20 # graphy
         "BSD" # jinja2
       ];
       longDescription = ''
@@ -8058,7 +8058,7 @@ let
         not a large parsing framework or a component of some larger system.
       '';
 
-      license = "revised-BSD";
+      license = with licenses; bsd3;
 
       maintainers = [ ];
     };
@@ -10164,7 +10164,7 @@ let
 
     meta = {
       homepage    = "https://github.com/rackspace/pyrax";
-      license     = "MIT";
+      license     = with licenses; mit;
       description = "Python API to interface with Rackspace";
     };
 
@@ -10240,7 +10240,7 @@ let
 
     meta = {
       homepage = "http://github.com/mongodb/mongo-python-driver";
-      license = [ "Apache-2.0" ];
+      license = with licenses; [ asl20 ];
       description = "Python driver for MongoDB ";
     };
   };
@@ -10308,7 +10308,7 @@ let
         in Python.
       '';
 
-      license = "revised BSD";
+      license = with licenses; bsd3;
 
       maintainers = [ ];
     };