The 'random' library is no longer a core library in GHC 7.2.1. For older

versions of the compiler, haskell-packages.nix provides a null attribute.

svn path=/nixpkgs/trunk/; revision=28500

pkgs/development/libraries/haskell/MonadRandom/default.nix

@@ -1,10 +1,10 @@
-{ cabal, mtl }:
+{ cabal, mtl, random }:
 
 cabal.mkDerivation (self: {
   pname = "MonadRandom";
   version = "0.1.6";
   sha256 = "1429w2h66sf0cw992xj4w9clapcqgpdzmh80as7zxf8l87rarqqp";
-  buildDepends = [ mtl ];
+  buildDepends = [ mtl random ];
   meta = {
     description = "Random-number generation monad";
     license = "unknown";