diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index bf64a4a60ff2..51d128f63b3e 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -1832,13 +1832,29 @@ let
       inherit ghc;
   };
 
-  ghc = ghc683;
+  ghc = ghc6102;
+
+  ghc642 = import ../development/compilers/ghc/6.4.2.nix {
+    inherit fetchurl stdenv perl ncurses readline m4 gmp;
+    ghc = ghc642Binary;
+  };
+
+  ghc642Binary = lowPrio (import ../development/compilers/ghc/6.4.2-binary.nix {
+    inherit fetchurl stdenv ncurses gmp;
+    readline = if stdenv.system == "i686-linux" then readline4 else readline;
+    perl = perl58;
+  });
 
   ghc682 = import ../development/compilers/ghc/6.8.2.nix {
     inherit fetchurl stdenv readline perl gmp ncurses m4;
     ghc = ghc642Binary;
   };
 
+  ghc661 = import ../development/compilers/ghc/6.6.1.nix {
+    inherit fetchurl stdenv readline perl58 gmp ncurses m4;
+    ghc = ghc642Binary;
+  };
+
   ghc683 = import ../development/compilers/ghc/6.8.3.nix {
     inherit fetchurl stdenv readline perl gmp ncurses m4;
     ghc = ghc642Binary;
@@ -1851,22 +1867,6 @@ let
     };
   };
 
-  ghc661 = import ../development/compilers/ghc/6.6.1.nix {
-    inherit fetchurl stdenv readline perl58 gmp ncurses m4;
-    ghc = ghc642Binary;
-  };
-
-  ghc642 = import ../development/compilers/ghc/6.4.2.nix {
-    inherit fetchurl stdenv perl ncurses readline m4 gmp;
-    ghc = ghc642Binary;
-  };
-
-  ghc642Binary = lowPrio (import ../development/compilers/ghc/6.4.2-binary.nix {
-    inherit fetchurl stdenv ncurses gmp;
-    readline = if stdenv.system == "i686-linux" then readline4 else readline;
-    perl = perl58;
-  });
-
   ghc6102 = import ../development/compilers/ghc/6.10.2.nix {
     inherit fetchurl stdenv perl ncurses gmp libedit;
     ghc = ghc6102Binary;
diff --git a/pkgs/top-level/release.nix b/pkgs/top-level/release.nix
index 3fae71484ce1..3e0b1387d089 100644
--- a/pkgs/top-level/release.nix
+++ b/pkgs/top-level/release.nix
@@ -121,7 +121,8 @@ in {
   gcc34 = linux;
   gcc43multi = ["x86_64-linux"];
   gdb = all;
-  ghc = ghcSupported;
+  ghc683 = ghcSupported;
+  ghc6102 = ghcSupported;
   ghostscript = linux;
   ghostscriptX = linux;
   gimp = linux;