diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index e71c2f49c7c6..75fbeb6d5c60 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -698,7 +698,7 @@ rec {
   #  m4 = gnum4;
   #};
 
-  ghc = ghc66;
+  ghc = ghc661;
 
   ghc661 = import ../development/compilers/ghc-6.6.1 {
     inherit fetchurl stdenv readline perl;