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-rw-r--r--pkgs/applications/science/math/eukleides/default.nix2
-rw-r--r--pkgs/applications/science/math/gap/default.nix3
-rw-r--r--pkgs/applications/science/math/mathematica/default.nix2
-rw-r--r--pkgs/applications/science/math/maxima/default.nix2
-rw-r--r--pkgs/applications/science/math/singular/default.nix3
-rw-r--r--pkgs/applications/science/math/weka/default.nix2
-rw-r--r--pkgs/applications/science/math/wxmaxima/default.nix2
-rw-r--r--pkgs/applications/science/math/yacas/default.nix2
8 files changed, 8 insertions, 10 deletions
diff --git a/pkgs/applications/science/math/eukleides/default.nix b/pkgs/applications/science/math/eukleides/default.nix
index 55ea4c6216c..fdf5c1bd831 100644
--- a/pkgs/applications/science/math/eukleides/default.nix
+++ b/pkgs/applications/science/math/eukleides/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation {
   meta = {
     description = "Geometry Drawing Language";
     homepage = "http://www.eukleides.org/";
-    license = "GPLv2";
+    license = stdenv.lib.licenses.gpl2;
 
     longDescription = ''
       Eukleides is a computer language devoted to elementary plane
diff --git a/pkgs/applications/science/math/gap/default.nix b/pkgs/applications/science/math/gap/default.nix
index f76640567f6..49a46e0c8b2 100644
--- a/pkgs/applications/science/math/gap/default.nix
+++ b/pkgs/applications/science/math/gap/default.nix
@@ -60,8 +60,7 @@ rec {
     ];
     platforms = with a.lib.platforms;
       linux;
-    license = "GPLv2";
+    license = stdenv.lib.licenses.gpl2;
     homepage = "http://gap-system.org/";
   };
 }) x
-
diff --git a/pkgs/applications/science/math/mathematica/default.nix b/pkgs/applications/science/math/mathematica/default.nix
index 997080ee303..d4d352c95bb 100644
--- a/pkgs/applications/science/math/mathematica/default.nix
+++ b/pkgs/applications/science/math/mathematica/default.nix
@@ -119,6 +119,6 @@ stdenv.mkDerivation rec {
   meta = {
     description = "Wolfram Mathematica computational software system";
     homepage = "http://www.wolfram.com/mathematica/";
-    license = "unfree";
+    license = stdenv.lib.licenses.unfree;
   };
 }
diff --git a/pkgs/applications/science/math/maxima/default.nix b/pkgs/applications/science/math/maxima/default.nix
index 7123b476f35..096796a859d 100644
--- a/pkgs/applications/science/math/maxima/default.nix
+++ b/pkgs/applications/science/math/maxima/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation {
   meta = {
     description = "Maxima computer algebra system";
     homepage = "http://maxima.sourceforge.net";
-    license = "GPLv2";
+    license = stdenv.lib.licenses.gpl2;
 
     longDescription = ''
       Maxima is a fairly complete computer algebra system written in
diff --git a/pkgs/applications/science/math/singular/default.nix b/pkgs/applications/science/math/singular/default.nix
index 5c5dfae8200..f4b3447e3b6 100644
--- a/pkgs/applications/science/math/singular/default.nix
+++ b/pkgs/applications/science/math/singular/default.nix
@@ -49,7 +49,7 @@ rec {
     ];
     platforms = with a.lib.platforms;
       linux;
-    license = "GPLv3"; # Or GPLv2 at your option - but not GPLv4
+    license = stdenv.lib.licenses.gpl3; # Or GPLv2 at your option - but not GPLv4
     homepage = "http://www.singular.uni-kl.de/index.php";
   };
   passthru = {
@@ -58,4 +58,3 @@ rec {
     };
   };
 }) x
-
diff --git a/pkgs/applications/science/math/weka/default.nix b/pkgs/applications/science/math/weka/default.nix
index 8471c46c8d7..66609fa5834 100644
--- a/pkgs/applications/science/math/weka/default.nix
+++ b/pkgs/applications/science/math/weka/default.nix
@@ -27,6 +27,6 @@ stdenv.mkDerivation {
   meta = {
     homepage = "http://www.cs.waikato.ac.nz/ml/weka/";
     description = "Collection of machine learning algorithms for data mining tasks";
-    license = "GPLv2+";
+    license = stdenv.lib.licenses.gpl2Plus;
   };
 }
diff --git a/pkgs/applications/science/math/wxmaxima/default.nix b/pkgs/applications/science/math/wxmaxima/default.nix
index 01be4ba7e6c..75448b6965c 100644
--- a/pkgs/applications/science/math/wxmaxima/default.nix
+++ b/pkgs/applications/science/math/wxmaxima/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "Cross platform GUI for the computer algebra system Maxima";
-    license = "GPL2";
+    license = stdenv.lib.licenses.gpl2;
     homepage = http://wxmaxima.sourceforge.net;
     platforms = stdenv.lib.platforms.linux;
     maintainers = [ stdenv.lib.maintainers.simons ];
diff --git a/pkgs/applications/science/math/yacas/default.nix b/pkgs/applications/science/math/yacas/default.nix
index acc4740eb6b..2c9d63be1b4 100644
--- a/pkgs/applications/science/math/yacas/default.nix
+++ b/pkgs/applications/science/math/yacas/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
   meta = { 
       description = "Easy to use, general purpose Computer Algebra System";
       homepage = http://yacas.sourceforge.net/;
-      license = "GPLv2+";
+      license = stdenv.lib.licenses.gpl2Plus;
       maintainers = with stdenv.lib.maintainers; [viric];
       platforms = with stdenv.lib.platforms; all;
   };