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-rw-r--r--pkgs/development/compilers/ghc/7.4.2.nix8
1 files changed, 5 insertions, 3 deletions
diff --git a/pkgs/development/compilers/ghc/7.4.2.nix b/pkgs/development/compilers/ghc/7.4.2.nix
index 1ea9e24a120..660f316e120 100644
--- a/pkgs/development/compilers/ghc/7.4.2.nix
+++ b/pkgs/development/compilers/ghc/7.4.2.nix
@@ -1,17 +1,19 @@
 { stdenv, fetchurl, ghc, perl, gmp, ncurses }:
 
 stdenv.mkDerivation rec {
-  version = "7.4.1.20120412";
+  version = "7.4.1.20120508";
 
   name = "ghc-${version}";
 
   src = fetchurl {
-    url = "http://haskell.org/ghc/dist/stable/dist/${name}-src.tar.bz2";
-    sha256 = "0hpzd51s5nvlsjk3wza45ji5v6m0szqjzch45fvv7wfzllrm595l";
+    url = "http://haskell.org/ghc/dist/7.4.2-rc1/${name}-src.tar.bz2";
+    sha256 = "0i55003p6ns5vzx8dpni5jv45kxwjqqgspf76505l2vcilra8j2c";
   };
 
   buildInputs = [ ghc perl gmp ncurses ];
 
+  enableParallelBuilding = true;
+
   buildMK = ''
     libraries/integer-gmp_CONFIGURE_OPTS += --configure-option=--with-gmp-libraries="${gmp}/lib"
     libraries/integer-gmp_CONFIGURE_OPTS += --configure-option=--with-gmp-includes="${gmp}/include"