diff --git a/pkgs/development/compilers/ghc/head.nix b/pkgs/development/compilers/ghc/head.nix
index 22f42bd90b5e..c79cdfbe3423 100644
--- a/pkgs/development/compilers/ghc/head.nix
+++ b/pkgs/development/compilers/ghc/head.nix
@@ -1,12 +1,12 @@
 { stdenv, fetchurl, ghc, perl, gmp, ncurses, happy, alex }:
 
 stdenv.mkDerivation rec {
-  version = "7.9.20141217";
+  version = "7.10.0.20141222";
   name = "ghc-${version}";
 
   src = fetchurl {
-    url = "http://deb.haskell.org/dailies/2014-12-17/ghc_${version}.orig.tar.bz2";
-    sha256 = "1yfdi9r07aqbnv6xfdhs6cpj0y0yjdr03l5sa4dv0j1xs3lh1wkv";
+    url = "https://downloads.haskell.org/~ghc/7.10.1-rc1/ghc-7.10.0.20141222-src.tar.xz";
+    sha256 = "0nncvvwksqqz1d991jbag3b4174i275nn0psadriq5hi3px11dkl";
   };
 
   buildInputs = [ ghc perl ncurses happy alex ];