diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 829d8a983bfb..ad38930d4673 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2501,9 +2501,9 @@ let
   # particularly in connection with Hydra builds for all these packages.
   # So we enable it for selected versions only.
 
-  # Current default version: 7.4.2.
-  haskellPackages = haskellPackages_ghc742;
-  # Current Haskell Platform: 2012.4.0.0
+  # Current default version: 7.6.3.
+  haskellPackages = haskellPackages_ghc763;
+  # Current Haskell Platform: 2013.2.0.0
   haskellPlatform = haskellPackages.haskellPlatform;
 
   haskellPackages_ghc6104             =                   haskell.packages_ghc6104;
@@ -2516,17 +2516,17 @@ let
   haskellPackages_ghc704              =                   haskell.packages_ghc704;
   haskellPackages_ghc721              =                   haskell.packages_ghc721;
   haskellPackages_ghc722              =                   haskell.packages_ghc722;
+  haskellPackages_ghc741              =                   haskell.packages_ghc741;
+  haskellPackages_ghc742              =                   haskell.packages_ghc742;
+  haskellPackages_ghc761              =                   haskell.packages_ghc761;
+  haskellPackages_ghc762              =                   haskell.packages_ghc762;
   # For the default version, we build profiling versions of the libraries, too.
   # The following three lines achieve that: the first two make Hydra build explicit
   # profiling and non-profiling versions; the final respects the user-configured
   # default setting.
-  haskellPackages_ghc741              =                   haskell.packages_ghc741;
-  haskellPackages_ghc742_no_profiling = recurseIntoAttrs (haskell.packages_ghc742.noProfiling);
-  haskellPackages_ghc742_profiling    = recurseIntoAttrs (haskell.packages_ghc742.profiling);
-  haskellPackages_ghc742              = recurseIntoAttrs (haskell.packages_ghc742.highPrio);
-  haskellPackages_ghc761              =                   haskell.packages_ghc761;
-  haskellPackages_ghc762              =                   haskell.packages_ghc762;
-  haskellPackages_ghc763              = recurseIntoAttrs  haskell.packages_ghc763;
+  haskellPackages_ghc763_no_profiling = recurseIntoAttrs (haskell.packages_ghc763.noProfiling);
+  haskellPackages_ghc763_profiling    = recurseIntoAttrs (haskell.packages_ghc763.profiling);
+  haskellPackages_ghc763              = recurseIntoAttrs (haskell.packages_ghc763.highPrio);
   # Reasonably current HEAD snapshot.
   haskellPackages_ghcHEAD             =                   haskell.packages_ghcHEAD;
 
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 82154f85ef99..988ec9a53a63 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -135,7 +135,7 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
   # GHC version, change the "preferences function" for that GHC version
   # in haskell-defaults.nix.
 
-  # NOTE: 2012.4.0.0 is the current default.
+  # NOTE: 2013.2.0.0 is the current default.
 
   haskellPlatformArgs_future = self : {
     inherit (self) cabal ghc;
diff --git a/pkgs/top-level/release-haskell.nix b/pkgs/top-level/release-haskell.nix
index 67647e11ccae..9a3bae89f9ca 100644
--- a/pkgs/top-level/release-haskell.nix
+++ b/pkgs/top-level/release-haskell.nix
@@ -11,8 +11,8 @@ let
   ghc704  = "ghc704";
   ghc742  = "ghc742";
   ghc763  = "ghc763";
-  default = [ ghc742 ];
-  latest  = [ ghc763 ];
+  default = [ ghc763 ];
+  latest  = [ ];
   all     = [ ghc6104 ghc6123 ghc704 ghc742 ghc763 ];
 
   allBut = platform: pkgs.lib.filter (x: platform != x) all;