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-rw-r--r--pkgs/development/tools/analysis/lcov/default.nix2
-rw-r--r--pkgs/development/tools/analysis/radare/default.nix2
-rw-r--r--pkgs/development/tools/analysis/radare/ired.nix2
-rw-r--r--pkgs/development/tools/analysis/valgrind/default.nix2
-rw-r--r--pkgs/development/tools/analysis/valkyrie/default.nix2
-rw-r--r--pkgs/development/tools/build-managers/buildbot-slave/default.nix2
-rw-r--r--pkgs/development/tools/build-managers/buildbot/default.nix2
-rw-r--r--pkgs/development/tools/build-managers/colormake/default.nix2
-rw-r--r--pkgs/development/tools/build-managers/gnumake/3.81/default.nix2
-rw-r--r--pkgs/development/tools/build-managers/gnumake/3.82/default.nix2
-rw-r--r--pkgs/development/tools/build-managers/gnumake/4.0/default.nix2
-rw-r--r--pkgs/development/tools/build-managers/gradle/default.nix2
-rw-r--r--pkgs/development/tools/build-managers/scons/default.nix2
-rw-r--r--pkgs/development/tools/documentation/doxygen/default.nix2
-rw-r--r--pkgs/development/tools/guile/g-wrap/default.nix2
-rw-r--r--pkgs/development/tools/java/fastjar/default.nix2
-rw-r--r--pkgs/development/tools/misc/autobuild/default.nix2
-rw-r--r--pkgs/development/tools/misc/autoconf/2.13.nix2
-rw-r--r--pkgs/development/tools/misc/autoconf/default.nix2
-rw-r--r--pkgs/development/tools/misc/automake/automake-1.11.x.nix2
-rw-r--r--pkgs/development/tools/misc/automake/automake-1.12.x.nix2
-rw-r--r--pkgs/development/tools/misc/automake/automake-1.13.x.nix2
-rw-r--r--pkgs/development/tools/misc/automake/automake-1.14.x.nix2
-rw-r--r--pkgs/development/tools/misc/binutils/default.nix2
-rw-r--r--pkgs/development/tools/misc/cbrowser/default.nix2
-rw-r--r--pkgs/development/tools/misc/cflow/default.nix2
-rw-r--r--pkgs/development/tools/misc/cgdb/default.nix2
-rw-r--r--pkgs/development/tools/misc/coccinelle/default.nix2
-rw-r--r--pkgs/development/tools/misc/complexity/default.nix2
-rw-r--r--pkgs/development/tools/misc/cppi/default.nix2
-rw-r--r--pkgs/development/tools/misc/ddd/default.nix2
-rw-r--r--pkgs/development/tools/misc/dejagnu/default.nix2
-rw-r--r--pkgs/development/tools/misc/gdb/default.nix2
-rw-r--r--pkgs/development/tools/misc/gengetopt/default.nix2
-rw-r--r--pkgs/development/tools/misc/global/default.nix2
-rw-r--r--pkgs/development/tools/misc/gnum4/default.nix2
-rw-r--r--pkgs/development/tools/misc/gob2/default.nix2
-rw-r--r--pkgs/development/tools/misc/gperf/default.nix2
-rw-r--r--pkgs/development/tools/misc/gtkdialog/default.nix2
-rw-r--r--pkgs/development/tools/misc/help2man/default.nix2
-rw-r--r--pkgs/development/tools/misc/hydra/default.nix2
-rw-r--r--pkgs/development/tools/misc/indent/default.nix2
-rw-r--r--pkgs/development/tools/misc/inotify-tools/default.nix2
-rw-r--r--pkgs/development/tools/misc/jscoverage/default.nix2
-rw-r--r--pkgs/development/tools/misc/libtool/default.nix2
-rw-r--r--pkgs/development/tools/misc/libtool/libtool2.nix2
-rw-r--r--pkgs/development/tools/misc/ninka/default.nix2
-rw-r--r--pkgs/development/tools/misc/pmccabe/default.nix2
-rw-r--r--pkgs/development/tools/misc/sloccount/default.nix2
-rw-r--r--pkgs/development/tools/misc/stm32flash/default.nix2
-rw-r--r--pkgs/development/tools/misc/sysbench/default.nix2
-rw-r--r--pkgs/development/tools/misc/texi2html/default.nix2
-rw-r--r--pkgs/development/tools/misc/texinfo/4.13a.nix2
-rw-r--r--pkgs/development/tools/misc/uisp/default.nix2
-rw-r--r--pkgs/development/tools/misc/usb-modeswitch/default.nix2
-rw-r--r--pkgs/development/tools/misc/xxdiff/default.nix2
-rw-r--r--pkgs/development/tools/ocaml/findlib/default.nix2
-rw-r--r--pkgs/development/tools/parsing/bison/2.x.nix2
-rw-r--r--pkgs/development/tools/parsing/bison/3.x.nix2
-rw-r--r--pkgs/development/tools/parsing/ragel/default.nix2
-rw-r--r--pkgs/development/tools/profiling/oprofile/default.nix2
-rw-r--r--pkgs/development/tools/profiling/sysprof/default.nix2
-rw-r--r--pkgs/development/tools/profiling/systemtap/default.nix2
-rw-r--r--pkgs/development/tools/pydb/default.nix2
64 files changed, 64 insertions, 64 deletions
diff --git a/pkgs/development/tools/analysis/lcov/default.nix b/pkgs/development/tools/analysis/lcov/default.nix
index 9ad34097d0b..89a17d28a1b 100644
--- a/pkgs/development/tools/analysis/lcov/default.nix
+++ b/pkgs/development/tools/analysis/lcov/default.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
       '';
 
     homepage = http://ltp.sourceforge.net/coverage/lcov.php;
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
 
     maintainers = [ maintainers.mornfall ];
     platforms = platforms.all;
diff --git a/pkgs/development/tools/analysis/radare/default.nix b/pkgs/development/tools/analysis/radare/default.nix
index d549bd8fb19..2ab8c05ebf8 100644
--- a/pkgs/development/tools/analysis/radare/default.nix
+++ b/pkgs/development/tools/analysis/radare/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
   meta = {
     description = "Free advanced command line hexadecimal editor";
     homepage = http://radare.org/;
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
     maintainers = with stdenv.lib.maintainers; [viric];
     platforms = with stdenv.lib.platforms; all;
   };
diff --git a/pkgs/development/tools/analysis/radare/ired.nix b/pkgs/development/tools/analysis/radare/ired.nix
index f7fb810410d..a2d135d4484 100644
--- a/pkgs/development/tools/analysis/radare/ired.nix
+++ b/pkgs/development/tools/analysis/radare/ired.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   meta = {
     description = "Interactive Raw Editor";
     homepage = http://radare.org/;
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
     maintainers = with stdenv.lib.maintainers; [viric];
     platforms = with stdenv.lib.platforms; all;
   };
diff --git a/pkgs/development/tools/analysis/valgrind/default.nix b/pkgs/development/tools/analysis/valgrind/default.nix
index a6ea2c2f59d..a7e55de7d47 100644
--- a/pkgs/development/tools/analysis/valgrind/default.nix
+++ b/pkgs/development/tools/analysis/valgrind/default.nix
@@ -52,7 +52,7 @@ stdenv.mkDerivation rec {
       Valgrind to build new tools.
     '';
 
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
 
     maintainers = [ stdenv.lib.maintainers.eelco ];
     platforms = stdenv.lib.platforms.linux ++ stdenv.lib.platforms.darwin;
diff --git a/pkgs/development/tools/analysis/valkyrie/default.nix b/pkgs/development/tools/analysis/valkyrie/default.nix
index 3a0879d6edf..18481d16f17 100644
--- a/pkgs/development/tools/analysis/valkyrie/default.nix
+++ b/pkgs/development/tools/analysis/valkyrie/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
     homepage = http://www.valgrind.org/;
     description = "Qt4-based GUI for the Valgrind 3.6.x series";
 
-    license = "GPLv2";
+    license = stdenv.lib.licenses.gpl2;
 
     platforms = stdenv.lib.platforms.linux;
   };
diff --git a/pkgs/development/tools/build-managers/buildbot-slave/default.nix b/pkgs/development/tools/build-managers/buildbot-slave/default.nix
index f21be7cc48c..870664c252a 100644
--- a/pkgs/development/tools/build-managers/buildbot-slave/default.nix
+++ b/pkgs/development/tools/build-managers/buildbot-slave/default.nix
@@ -34,7 +34,7 @@ buildPythonPackage (rec {
   meta = with stdenv.lib; {
     homepage = http://buildbot.net/;
 
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
 
     description = "Continuous integration system that automates the build/test cycle";
 
diff --git a/pkgs/development/tools/build-managers/buildbot/default.nix b/pkgs/development/tools/build-managers/buildbot/default.nix
index 2d7c63fdc7d..ccbf74e528e 100644
--- a/pkgs/development/tools/build-managers/buildbot/default.nix
+++ b/pkgs/development/tools/build-managers/buildbot/default.nix
@@ -52,7 +52,7 @@ buildPythonPackage (rec {
   meta = with stdenv.lib; {
     homepage = http://buildbot.net/;
 
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
 
     # Of course, we don't really need that on NixOS.  :-)
     description = "Continuous integration system that automates the build/test cycle";
diff --git a/pkgs/development/tools/build-managers/colormake/default.nix b/pkgs/development/tools/build-managers/colormake/default.nix
index 25ef7ef0b24..edc901858b8 100644
--- a/pkgs/development/tools/build-managers/colormake/default.nix
+++ b/pkgs/development/tools/build-managers/colormake/default.nix
@@ -19,6 +19,6 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Simple wrapper around make to colorize the output";
-    license = "GPLv2";
+    license = stdenv.lib.licenses.gpl2;
   };
 }
diff --git a/pkgs/development/tools/build-managers/gnumake/3.81/default.nix b/pkgs/development/tools/build-managers/gnumake/3.81/default.nix
index 56d2326c916..2a8c80e7db2 100644
--- a/pkgs/development/tools/build-managers/gnumake/3.81/default.nix
+++ b/pkgs/development/tools/build-managers/gnumake/3.81/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation {
 
     homepage = http://www.gnu.org/software/make/;
 
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
     maintainers = [ stdenv.lib.maintainers.ludo ];
   };
 }
diff --git a/pkgs/development/tools/build-managers/gnumake/3.82/default.nix b/pkgs/development/tools/build-managers/gnumake/3.82/default.nix
index 4f3c7defa48..6b24df39be9 100644
--- a/pkgs/development/tools/build-managers/gnumake/3.82/default.nix
+++ b/pkgs/development/tools/build-managers/gnumake/3.82/default.nix
@@ -56,7 +56,7 @@ stdenv.mkDerivation {
 
     homepage = http://www.gnu.org/software/make/;
 
-    license = "GPLv3+";
+    license = stdenv.lib.licenses.gpl3Plus;
     maintainers = [ stdenv.lib.maintainers.ludo ];
     platforms = stdenv.lib.platforms.all;
   };
diff --git a/pkgs/development/tools/build-managers/gnumake/4.0/default.nix b/pkgs/development/tools/build-managers/gnumake/4.0/default.nix
index 6a76fa0302b..2da17490abf 100644
--- a/pkgs/development/tools/build-managers/gnumake/4.0/default.nix
+++ b/pkgs/development/tools/build-managers/gnumake/4.0/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation {
 
     homepage = http://www.gnu.org/software/make/;
 
-    license = "GPLv3+";
+    license = stdenv.lib.licenses.gpl3Plus;
     maintainers = [ stdenv.lib.maintainers.ludo ];
     platforms = stdenv.lib.platforms.all;
   };
diff --git a/pkgs/development/tools/build-managers/gradle/default.nix b/pkgs/development/tools/build-managers/gradle/default.nix
index f8466e5aafd..b7316fc17c4 100644
--- a/pkgs/development/tools/build-managers/gradle/default.nix
+++ b/pkgs/development/tools/build-managers/gradle/default.nix
@@ -32,6 +32,6 @@ stdenv.mkDerivation rec {
       build-by-convention behavior.
     '';
     homepage = http://www.gradle.org/;
-    license = "ASL2.0";
+    license = stdenv.lib.licenses.asl20;
   };
 }
diff --git a/pkgs/development/tools/build-managers/scons/default.nix b/pkgs/development/tools/build-managers/scons/default.nix
index c6856dae565..75d72e3d52a 100644
--- a/pkgs/development/tools/build-managers/scons/default.nix
+++ b/pkgs/development/tools/build-managers/scons/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation {
   meta = {
     homepage = "http://scons.org/";
     description = "An improved, cross-platform substitute for Make";
-    license = "MIT";
+    license = stdenv.lib.licenses.mit;
     longDescription = ''
       SCons is an Open Source software construction tool. Think of
       SCons as an improved, cross-platform substitute for the classic
diff --git a/pkgs/development/tools/documentation/doxygen/default.nix b/pkgs/development/tools/documentation/doxygen/default.nix
index 9a8979aaa6c..54509178b1a 100644
--- a/pkgs/development/tools/documentation/doxygen/default.nix
+++ b/pkgs/development/tools/documentation/doxygen/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation {
   enableParallelBuilding = true;
 
   meta = {
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
     homepage = "http://doxygen.org/";
     description = "Doxygen, a source code documentation generator tool";
 
diff --git a/pkgs/development/tools/guile/g-wrap/default.nix b/pkgs/development/tools/guile/g-wrap/default.nix
index 8698dc27b40..74e967686f3 100644
--- a/pkgs/development/tools/guile/g-wrap/default.nix
+++ b/pkgs/development/tools/guile/g-wrap/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
       generating Guile wrappers for C functions.
     '';
     homepage = http://www.nongnu.org/g-wrap/;
-    license = "LGPLv2+";
+    license = stdenv.lib.licenses.lgpl2Plus;
     maintainers = [ stdenv.lib.maintainers.ludo ];
   };
 }
diff --git a/pkgs/development/tools/java/fastjar/default.nix b/pkgs/development/tools/java/fastjar/default.nix
index cfcd8564b4c..c8bb94412ca 100644
--- a/pkgs/development/tools/java/fastjar/default.nix
+++ b/pkgs/development/tools/java/fastjar/default.nix
@@ -24,7 +24,7 @@ let version = "0.94"; in
 
       homepage = http://fastjar.sourceforge.net/;
 
-      license = "GPLv2+";
+      license = stdenv.lib.licenses.gpl2Plus;
 
       maintainers = [ ];
     };
diff --git a/pkgs/development/tools/misc/autobuild/default.nix b/pkgs/development/tools/misc/autobuild/default.nix
index 88246e4bb6e..b35ec4357c4 100644
--- a/pkgs/development/tools/misc/autobuild/default.nix
+++ b/pkgs/development/tools/misc/autobuild/default.nix
@@ -34,6 +34,6 @@ stdenv.mkDerivation rec {
     '';
 
     homepage = http://josefsson.org/autobuild/;
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
   };
 }
diff --git a/pkgs/development/tools/misc/autoconf/2.13.nix b/pkgs/development/tools/misc/autoconf/2.13.nix
index f6793e3aeec..c3b44ca5686 100644
--- a/pkgs/development/tools/misc/autoconf/2.13.nix
+++ b/pkgs/development/tools/misc/autoconf/2.13.nix
@@ -31,6 +31,6 @@ stdenv.mkDerivation rec {
       can use, in the form of M4 macro calls.
     '';
 
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
   };
 }
diff --git a/pkgs/development/tools/misc/autoconf/default.nix b/pkgs/development/tools/misc/autoconf/default.nix
index 08fcd95afb5..38fe289d29a 100644
--- a/pkgs/development/tools/misc/autoconf/default.nix
+++ b/pkgs/development/tools/misc/autoconf/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
       can use, in the form of M4 macro calls.
     '';
 
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
 
     maintainers = [ stdenv.lib.maintainers.ludo ];
   };
diff --git a/pkgs/development/tools/misc/automake/automake-1.11.x.nix b/pkgs/development/tools/misc/automake/automake-1.11.x.nix
index 0af9877c935..2cd80eb4bac 100644
--- a/pkgs/development/tools/misc/automake/automake-1.11.x.nix
+++ b/pkgs/development/tools/misc/automake/automake-1.11.x.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
       Standards.  Automake requires the use of Autoconf.
     '';
 
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
 
     maintainers = [ stdenv.lib.maintainers.ludo ];
   };
diff --git a/pkgs/development/tools/misc/automake/automake-1.12.x.nix b/pkgs/development/tools/misc/automake/automake-1.12.x.nix
index 269d423f2fa..6a93cdc78fd 100644
--- a/pkgs/development/tools/misc/automake/automake-1.12.x.nix
+++ b/pkgs/development/tools/misc/automake/automake-1.12.x.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation rec {
       Standards.  Automake requires the use of Autoconf.
     '';
 
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
 
     maintainers = [ stdenv.lib.maintainers.ludo ];
   };
diff --git a/pkgs/development/tools/misc/automake/automake-1.13.x.nix b/pkgs/development/tools/misc/automake/automake-1.13.x.nix
index 96a93e8d60b..d4369787f1b 100644
--- a/pkgs/development/tools/misc/automake/automake-1.13.x.nix
+++ b/pkgs/development/tools/misc/automake/automake-1.13.x.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
   meta = {
     homepage = "http://www.gnu.org/software/automake/";
     description = "GNU standard-compliant makefile generator";
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
 
     longDescription = ''
       GNU Automake is a tool for automatically generating
diff --git a/pkgs/development/tools/misc/automake/automake-1.14.x.nix b/pkgs/development/tools/misc/automake/automake-1.14.x.nix
index d20ea2c2e91..0c6ed42825a 100644
--- a/pkgs/development/tools/misc/automake/automake-1.14.x.nix
+++ b/pkgs/development/tools/misc/automake/automake-1.14.x.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
   meta = {
     homepage = "http://www.gnu.org/software/automake/";
     description = "GNU standard-compliant makefile generator";
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
 
     longDescription = ''
       GNU Automake is a tool for automatically generating
diff --git a/pkgs/development/tools/misc/binutils/default.nix b/pkgs/development/tools/misc/binutils/default.nix
index 3caeee7287a..8d8fc5d464e 100644
--- a/pkgs/development/tools/misc/binutils/default.nix
+++ b/pkgs/development/tools/misc/binutils/default.nix
@@ -78,7 +78,7 @@ stdenv.mkDerivation rec {
 
     homepage = http://www.gnu.org/software/binutils/;
 
-    license = "GPLv3+";
+    license = stdenv.lib.licenses.gpl3Plus;
 
     /* Give binutils a lower priority than gcc-wrapper to prevent a
        collision due to the ld/as wrappers/symlinks in the latter. */
diff --git a/pkgs/development/tools/misc/cbrowser/default.nix b/pkgs/development/tools/misc/cbrowser/default.nix
index bf927db2793..2cc8e640631 100644
--- a/pkgs/development/tools/misc/cbrowser/default.nix
+++ b/pkgs/development/tools/misc/cbrowser/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   meta = {
     description = "Tcl/Tk GUI front-end to cscope";
 
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
 
     homepage = http://sourceforge.net/projects/cbrowser/;
 
diff --git a/pkgs/development/tools/misc/cflow/default.nix b/pkgs/development/tools/misc/cflow/default.nix
index d9be5802fa9..53bc8ed78c8 100644
--- a/pkgs/development/tools/misc/cflow/default.nix
+++ b/pkgs/development/tools/misc/cflow/default.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
       produced flowcharts in Emacs.
     '';
 
-    license = "GPLv3+";
+    license = stdenv.lib.licenses.gpl3Plus;
 
     homepage = http://www.gnu.org/software/cflow/;
 
diff --git a/pkgs/development/tools/misc/cgdb/default.nix b/pkgs/development/tools/misc/cgdb/default.nix
index d313d271afb..09c9325d4ff 100644
--- a/pkgs/development/tools/misc/cgdb/default.nix
+++ b/pkgs/development/tools/misc/cgdb/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
 
     repositories.git = git://github.com/cgdb/cgdb.git;
 
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
 
     platforms = with stdenv.lib.platforms; linux ++ cygwin;
     maintainers = with stdenv.lib.maintainers; [ viric ];
diff --git a/pkgs/development/tools/misc/coccinelle/default.nix b/pkgs/development/tools/misc/coccinelle/default.nix
index 122c256657f..0bf5bbce692 100644
--- a/pkgs/development/tools/misc/coccinelle/default.nix
+++ b/pkgs/development/tools/misc/coccinelle/default.nix
@@ -54,7 +54,7 @@ in stdenv.mkDerivation {
       '';
 
     homepage = http://coccinelle.lip6.fr/;
-    license = "GPLv2";
+    license = stdenv.lib.licenses.gpl2;
 
     maintainers = [ ];
     platforms = stdenv.lib.platforms.gnu;  # arbitrary choice
diff --git a/pkgs/development/tools/misc/complexity/default.nix b/pkgs/development/tools/misc/complexity/default.nix
index cfdc35f1b34..9f1eca0fa13 100644
--- a/pkgs/development/tools/misc/complexity/default.nix
+++ b/pkgs/development/tools/misc/complexity/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
          addresses several issues not considered in that scoring scheme.
       '';
 
-    license = "GPLv3+";
+    license = stdenv.lib.licenses.gpl3Plus;
 
     homepage = http://www.gnu.org/software/complexity/;
 
diff --git a/pkgs/development/tools/misc/cppi/default.nix b/pkgs/development/tools/misc/cppi/default.nix
index f9246df9e56..500129c7c9d 100644
--- a/pkgs/development/tools/misc/cppi/default.nix
+++ b/pkgs/development/tools/misc/cppi/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
          to the level of nesting of that directive.
       '';
 
-    license = "GPLv3+";
+    license = stdenv.lib.licenses.gpl3Plus;
 
     maintainers = [ stdenv.lib.maintainers.ludo ];
     platforms = stdenv.lib.platforms.all;
diff --git a/pkgs/development/tools/misc/ddd/default.nix b/pkgs/development/tools/misc/ddd/default.nix
index 0a6895aff6b..91150255bda 100644
--- a/pkgs/development/tools/misc/ddd/default.nix
+++ b/pkgs/development/tools/misc/ddd/default.nix
@@ -13,6 +13,6 @@ stdenv.mkDerivation rec {
 	meta = {
 	  homepage = http://www.gnu.org/software/ddd;
 		description = "Graphical front-end for command-line debuggers";
-		license = "GPLv2";
+		license = stdenv.lib.licenses.gpl2;
 	};
 }
diff --git a/pkgs/development/tools/misc/dejagnu/default.nix b/pkgs/development/tools/misc/dejagnu/default.nix
index 9e400cc5c62..bc22752fe7e 100644
--- a/pkgs/development/tools/misc/dejagnu/default.nix
+++ b/pkgs/development/tools/misc/dejagnu/default.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
     '';
 
     homepage = http://www.gnu.org/software/dejagnu/;
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
 
     platforms = stdenv.lib.platforms.all;
     maintainers = [ stdenv.lib.maintainers.ludo ];
diff --git a/pkgs/development/tools/misc/gdb/default.nix b/pkgs/development/tools/misc/gdb/default.nix
index b3a86a03d97..2b5ced78063 100644
--- a/pkgs/development/tools/misc/gdb/default.nix
+++ b/pkgs/development/tools/misc/gdb/default.nix
@@ -78,7 +78,7 @@ stdenv.mkDerivation rec {
 
     homepage = http://www.gnu.org/software/gdb/;
 
-    license = "GPLv3+";
+    license = stdenv.lib.licenses.gpl3Plus;
 
     platforms = with platforms; linux ++ cygwin ++ darwin;
     maintainers = with maintainers; [ pierron ];
diff --git a/pkgs/development/tools/misc/gengetopt/default.nix b/pkgs/development/tools/misc/gengetopt/default.nix
index d0efe4e6249..9926dd6cd33 100644
--- a/pkgs/development/tools/misc/gengetopt/default.nix
+++ b/pkgs/development/tools/misc/gengetopt/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
     homepage = http://www.gnu.org/software/gengetopt/;
 
-    license = "GPLv3+";
+    license = stdenv.lib.licenses.gpl3Plus;
 
     maintainers = [ ];
     platforms = stdenv.lib.platforms.all;
diff --git a/pkgs/development/tools/misc/global/default.nix b/pkgs/development/tools/misc/global/default.nix
index fdb5f72af83..d6abf8d10bd 100644
--- a/pkgs/development/tools/misc/global/default.nix
+++ b/pkgs/development/tools/misc/global/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
       operating system like GNU and BSD.
     '';
 
-    license = "GPLv3+";
+    license = stdenv.lib.licenses.gpl3Plus;
 
     homepage = http://www.gnu.org/software/global/;
 
diff --git a/pkgs/development/tools/misc/gnum4/default.nix b/pkgs/development/tools/misc/gnum4/default.nix
index 75e8e2dfe4f..67688254a40 100644
--- a/pkgs/development/tools/misc/gnum4/default.nix
+++ b/pkgs/development/tools/misc/gnum4/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
       compiler or as a macro processor in its own right.
     '';
 
-    license = "GPLv3+";
+    license = stdenv.lib.licenses.gpl3Plus;
   };
 
 }
diff --git a/pkgs/development/tools/misc/gob2/default.nix b/pkgs/development/tools/misc/gob2/default.nix
index 2f35f96e932..a434e54bba9 100644
--- a/pkgs/development/tools/misc/gob2/default.nix
+++ b/pkgs/development/tools/misc/gob2/default.nix
@@ -15,6 +15,6 @@ stdenv.mkDerivation rec {
   meta = {
     description = "Preprocessor for making GObjects with inline C code";
     homepage = http://www.jirka.org/gob.html;
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
   };
 }
diff --git a/pkgs/development/tools/misc/gperf/default.nix b/pkgs/development/tools/misc/gperf/default.nix
index 478d2162b33..e25998e5420 100644
--- a/pkgs/development/tools/misc/gperf/default.nix
+++ b/pkgs/development/tools/misc/gperf/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
       employed by gperf.
     '';
 
-    license = "GPLv3+";
+    license = stdenv.lib.licenses.gpl3Plus;
 
     homepage = http://www.gnu.org/software/gperf/;
   };
diff --git a/pkgs/development/tools/misc/gtkdialog/default.nix b/pkgs/development/tools/misc/gtkdialog/default.nix
index b447cf918cf..cd8ad0d64cd 100644
--- a/pkgs/development/tools/misc/gtkdialog/default.nix
+++ b/pkgs/development/tools/misc/gtkdialog/default.nix
@@ -13,6 +13,6 @@ stdenv.mkDerivation {
   meta = {
     homepage = http://gtkdialog.googlecode.com/;
     description = "Small utility for fast and easy GUI building from many scripted and compiled languages";
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
   };
 }
diff --git a/pkgs/development/tools/misc/help2man/default.nix b/pkgs/development/tools/misc/help2man/default.nix
index 2d60a06fb3e..23bd35c8739 100644
--- a/pkgs/development/tools/misc/help2man/default.nix
+++ b/pkgs/development/tools/misc/help2man/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
 
     homepage = http://www.gnu.org/software/help2man/;
 
-    license = "GPLv3+";
+    license = stdenv.lib.licenses.gpl3Plus;
     platforms = stdenv.lib.platforms.gnu;         # arbitrary choice
     maintainers = [ stdenv.lib.maintainers.ludo ];
   };
diff --git a/pkgs/development/tools/misc/hydra/default.nix b/pkgs/development/tools/misc/hydra/default.nix
index caa277bfbf5..0940bcca191 100644
--- a/pkgs/development/tools/misc/hydra/default.nix
+++ b/pkgs/development/tools/misc/hydra/default.nix
@@ -67,7 +67,7 @@ stdenv.mkDerivation {
   meta = {
     description = "Hydra, the Nix-based continuous integration system";
     homepage = http://nixos.org/hydra/;
-    license = "GPLv3+";
+    license = stdenv.lib.licenses.gpl3Plus;
     platforms = stdenv.lib.platforms.linux;
   };
 }
diff --git a/pkgs/development/tools/misc/indent/default.nix b/pkgs/development/tools/misc/indent/default.nix
index 0c82c2cd275..17714b7a9d4 100644
--- a/pkgs/development/tools/misc/indent/default.nix
+++ b/pkgs/development/tools/misc/indent/default.nix
@@ -18,6 +18,6 @@ stdenv.mkDerivation rec {
   meta = {
     homepage = http://www.gnu.org/software/indent/;
     description = "A source code reformatter";
-    license = "GPLv3+";
+    license = stdenv.lib.licenses.gpl3Plus;
   };
 }
diff --git a/pkgs/development/tools/misc/inotify-tools/default.nix b/pkgs/development/tools/misc/inotify-tools/default.nix
index 0465b6d90a8..086f4b5fed3 100644
--- a/pkgs/development/tools/misc/inotify-tools/default.nix
+++ b/pkgs/development/tools/misc/inotify-tools/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation {
 
   meta = {
     homepage = http://sourceforge.net/projects/inotify-tools/;
-    license = "GPLv2";
+    license = stdenv.lib.licenses.gpl2;
     maintainers = [ stdenv.lib.maintainers.marcweber ];
     platforms = stdenv.lib.platforms.linux;
   };
diff --git a/pkgs/development/tools/misc/jscoverage/default.nix b/pkgs/development/tools/misc/jscoverage/default.nix
index c7f790b7d50..07ef5ffc082 100644
--- a/pkgs/development/tools/misc/jscoverage/default.nix
+++ b/pkgs/development/tools/misc/jscoverage/default.nix
@@ -42,6 +42,6 @@ stdenv.mkDerivation rec {
     '';
 
     homepage = http://siliconforks.com/jscoverage/;
-    license = "GPLv2";
+    license = stdenv.lib.licenses.gpl2;
   };
 }
diff --git a/pkgs/development/tools/misc/libtool/default.nix b/pkgs/development/tools/misc/libtool/default.nix
index 78cd15e04bd..5eee9ead5d6 100644
--- a/pkgs/development/tools/misc/libtool/default.nix
+++ b/pkgs/development/tools/misc/libtool/default.nix
@@ -29,6 +29,6 @@ stdenv.mkDerivation rec {
 
     homepage = http://www.gnu.org/software/libtool/;
 
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
   };
 }
diff --git a/pkgs/development/tools/misc/libtool/libtool2.nix b/pkgs/development/tools/misc/libtool/libtool2.nix
index 4c3500c65a2..8b0a92c1244 100644
--- a/pkgs/development/tools/misc/libtool/libtool2.nix
+++ b/pkgs/development/tools/misc/libtool/libtool2.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation (rec {
 
     homepage = http://www.gnu.org/software/libtool/;
 
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
 
     maintainers = [ stdenv.lib.maintainers.ludo ];
   };
diff --git a/pkgs/development/tools/misc/ninka/default.nix b/pkgs/development/tools/misc/ninka/default.nix
index a5410204340..dc7eb5cabfd 100644
--- a/pkgs/development/tools/misc/ninka/default.nix
+++ b/pkgs/development/tools/misc/ninka/default.nix
@@ -29,6 +29,6 @@ stdenv.mkDerivation rec {
   meta = {
     description = "A sentence based license detector";
     homepage = "http://ninka.turingmachine.org/";
-    license = "AGPLv3+";
+    license = stdenv.lib.licenses.agpl3Plus;
   };
 }
diff --git a/pkgs/development/tools/misc/pmccabe/default.nix b/pkgs/development/tools/misc/pmccabe/default.nix
index 10cf371f13a..a71afd5d472 100644
--- a/pkgs/development/tools/misc/pmccabe/default.nix
+++ b/pkgs/development/tools/misc/pmccabe/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   meta = {
     description = "McCabe-style function complexity and line counting for C and C++";
     homepage = http://www.parisc-linux.org/~bame/pmccabe/;
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
 
     longDescription = ''
       pmccabe calculates McCabe-style cyclomatic complexity for C and
diff --git a/pkgs/development/tools/misc/sloccount/default.nix b/pkgs/development/tools/misc/sloccount/default.nix
index 9dc50abf3f7..455305be749 100644
--- a/pkgs/development/tools/misc/sloccount/default.nix
+++ b/pkgs/development/tools/misc/sloccount/default.nix
@@ -56,7 +56,7 @@ stdenv.mkDerivation rec {
       the Perl CPAN library using this tool suite.
     '';
 
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
 
     homepage = http://www.dwheeler.com/sloccount/;
 
diff --git a/pkgs/development/tools/misc/stm32flash/default.nix b/pkgs/development/tools/misc/stm32flash/default.nix
index 6b99a5755e4..6b06bf385b3 100644
--- a/pkgs/development/tools/misc/stm32flash/default.nix
+++ b/pkgs/development/tools/misc/stm32flash/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation {
   meta = with stdenv.lib; {
     description = "Open source flash program for the STM32 ARM processors using the ST bootloader";
     homepage = https://code.google.com/p/stm32flash/;
-    license = "GPLv2";
+    license = stdenv.lib.licenses.gpl2;
     platforms = platforms.all; # Should work on all platforms
     maintainers = [ maintainers.the-kenny ];
   };
diff --git a/pkgs/development/tools/misc/sysbench/default.nix b/pkgs/development/tools/misc/sysbench/default.nix
index e3acf620c73..1b4cab361ce 100644
--- a/pkgs/development/tools/misc/sysbench/default.nix
+++ b/pkgs/development/tools/misc/sysbench/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Modular, cross-platform and multi-threaded benchmark tool";
-    license = "GPLv2";
+    license = stdenv.lib.licenses.gpl2;
     platforms = stdenv.lib.platforms.linux;
   };
 }
diff --git a/pkgs/development/tools/misc/texi2html/default.nix b/pkgs/development/tools/misc/texi2html/default.nix
index 7fa604e4af6..1f36a14fa97 100644
--- a/pkgs/development/tools/misc/texi2html/default.nix
+++ b/pkgs/development/tools/misc/texi2html/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
   meta = { 
     description = "Perl script which converts Texinfo source files to HTML output";
     homepage = http://www.nongnu.org/texi2html/;
-    license = "GPLv2";
+    license = stdenv.lib.licenses.gpl2;
     maintainers = [stdenv.lib.maintainers.marcweber];
     platforms = stdenv.lib.platforms.linux;
   };
diff --git a/pkgs/development/tools/misc/texinfo/4.13a.nix b/pkgs/development/tools/misc/texinfo/4.13a.nix
index 9a41d296342..5131d381412 100644
--- a/pkgs/development/tools/misc/texinfo/4.13a.nix
+++ b/pkgs/development/tools/misc/texinfo/4.13a.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
       well-integrated with GNU Emacs.
     '';
 
-    license = "GPLv3+";
+    license = stdenv.lib.licenses.gpl3Plus;
 
     homepage = http://www.gnu.org/software/texinfo/;
   };
diff --git a/pkgs/development/tools/misc/uisp/default.nix b/pkgs/development/tools/misc/uisp/default.nix
index 732d3ab92c1..234ff82b50a 100644
--- a/pkgs/development/tools/misc/uisp/default.nix
+++ b/pkgs/development/tools/misc/uisp/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "Tool for AVR microcontrollers which can interface to many hardware in-system programmers";
-    license = "GPL-2";
+    license = stdenv.lib.licenses.gpl2;
     homepage = http://savannah.nongnu.org/projects/uisp;
   };
 }
diff --git a/pkgs/development/tools/misc/usb-modeswitch/default.nix b/pkgs/development/tools/misc/usb-modeswitch/default.nix
index 303cdf89a05..bba7ef7fad0 100644
--- a/pkgs/development/tools/misc/usb-modeswitch/default.nix
+++ b/pkgs/development/tools/misc/usb-modeswitch/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ pkgconfig libusb1 ];
 
   meta = {
-    license = "GPLv2";
+    license = stdenv.lib.licenses.gpl2;
     maintainers = [ stdenv.lib.maintainers.marcweber ];
     platforms = stdenv.lib.platforms.linux;
   };
diff --git a/pkgs/development/tools/misc/xxdiff/default.nix b/pkgs/development/tools/misc/xxdiff/default.nix
index 36047210a92..1d7e6b33042 100644
--- a/pkgs/development/tools/misc/xxdiff/default.nix
+++ b/pkgs/development/tools/misc/xxdiff/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
   meta = {
     homepage = "http://furius.ca/xxdiff/";
     description = "graphical file and directories comparator and merge tool";
-    license = "GPLv2";
+    license = stdenv.lib.licenses.gpl2;
 
     platforms = stdenv.lib.platforms.linux;
     maintainers = [];
diff --git a/pkgs/development/tools/ocaml/findlib/default.nix b/pkgs/development/tools/ocaml/findlib/default.nix
index 18b03f5923b..4c0176de7e8 100644
--- a/pkgs/development/tools/ocaml/findlib/default.nix
+++ b/pkgs/development/tools/ocaml/findlib/default.nix
@@ -49,7 +49,7 @@ stdenv.mkDerivation {
   meta = {
     homepage = http://projects.camlcity.org/projects/findlib.html;
     description = "O'Caml library manager";
-    license = "MIT/X11";
+    license = stdenv.lib.licenses.mit;
     platforms = ocaml.meta.platforms;
     maintainers = [
       stdenv.lib.maintainers.z77z
diff --git a/pkgs/development/tools/parsing/bison/2.x.nix b/pkgs/development/tools/parsing/bison/2.x.nix
index 5660d51f060..5bf5d7c2e8c 100644
--- a/pkgs/development/tools/parsing/bison/2.x.nix
+++ b/pkgs/development/tools/parsing/bison/2.x.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
   meta = {
     homepage = "http://www.gnu.org/software/bison/";
     description = "GNU Bison, a Yacc-compatible parser generator";
-    license = "GPLv3+";
+    license = stdenv.lib.licenses.gpl3Plus;
 
     longDescription = ''
       Bison is a general-purpose parser generator that converts an
diff --git a/pkgs/development/tools/parsing/bison/3.x.nix b/pkgs/development/tools/parsing/bison/3.x.nix
index 284223905f6..5947f85343c 100644
--- a/pkgs/development/tools/parsing/bison/3.x.nix
+++ b/pkgs/development/tools/parsing/bison/3.x.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   meta = {
     homepage = "http://www.gnu.org/software/bison/";
     description = "GNU Bison, a Yacc-compatible parser generator";
-    license = "GPLv3+";
+    license = stdenv.lib.licenses.gpl3Plus;
 
     longDescription = ''
       Bison is a general-purpose parser generator that converts an
diff --git a/pkgs/development/tools/parsing/ragel/default.nix b/pkgs/development/tools/parsing/ragel/default.nix
index 2dec606254b..08980d5b1c4 100644
--- a/pkgs/development/tools/parsing/ragel/default.nix
+++ b/pkgs/development/tools/parsing/ragel/default.nix
@@ -37,6 +37,6 @@ composableDerivation.composableDerivation {} {
   meta = {
     homepage = http://www.complang.org/ragel;
     description = "State machine compiler";
-    license = "GPL-2";
+    license = stdenv.lib.licenses.gpl2;
   };
 }
diff --git a/pkgs/development/tools/profiling/oprofile/default.nix b/pkgs/development/tools/profiling/oprofile/default.nix
index ee464423929..e301fe8431a 100644
--- a/pkgs/development/tools/profiling/oprofile/default.nix
+++ b/pkgs/development/tools/profiling/oprofile/default.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
       is profiled: hardware and software interrupt handlers, kernel
       modules, the kernel, shared libraries, and applications.
     '';
-    license = "GPLv2";
+    license = stdenv.lib.licenses.gpl2;
     homepage = http://oprofile.sourceforge.net/;
 
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/development/tools/profiling/sysprof/default.nix b/pkgs/development/tools/profiling/sysprof/default.nix
index b6750f88937..457a5d1dcaa 100644
--- a/pkgs/development/tools/profiling/sysprof/default.nix
+++ b/pkgs/development/tools/profiling/sysprof/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   meta = {
     homepage = http://sysprof.com/;
     description = "Sysprof, a system-wide profiler for Linux";
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
 
     longDescription = ''
       Sysprof is a sampling CPU profiler for Linux that uses the perf_event_open
diff --git a/pkgs/development/tools/profiling/systemtap/default.nix b/pkgs/development/tools/profiling/systemtap/default.nix
index 884091c1636..66dda8f43ef 100644
--- a/pkgs/development/tools/profiling/systemtap/default.nix
+++ b/pkgs/development/tools/profiling/systemtap/default.nix
@@ -65,7 +65,7 @@ stdenv.mkDerivation rec {
 
     homepage = http://sourceware.org/systemtap/;
 
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
 
     maintainers = [ ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/development/tools/pydb/default.nix b/pkgs/development/tools/pydb/default.nix
index 23f0dea4453..baa816589ca 100644
--- a/pkgs/development/tools/pydb/default.nix
+++ b/pkgs/development/tools/pydb/default.nix
@@ -18,6 +18,6 @@ stdenv.mkDerivation {
   meta = { 
     description = "Python debugger with GDB-like commands and Emacs bindings";
     homepage = http://bashdb.sourceforge.net/pydb/;
-    license = "GPLv3";
+    license = stdenv.lib.licenses.gpl3;
   };
 }