anchor.diff:        haskellOverlays.ghc-head
       ]);
     };
  +  ghc8_2 = ghc8_2_1;
     ghc8_2_1 = (makeRecursivelyOverridable nixpkgs.haskell.packages.ghc821).override {
       overrides = lib.foldr lib.composeExtensions (_: _: {}) (let
         haskellOverlays = mkHaskellOverlays nixpkgs;
  
positive.code:       haskellOverlays.ghc-8_2_1
      ]);
    };
    ghc = (makeRecursivelyOverridable nixpkgs.haskell.packages.ghc802).override {
      overrides = lib.foldr lib.composeExtensions (_: _: {}) (let
        haskellOverlays = mkHaskellOverlays nixpkgs;
      in [
  
negative.code:           stage2Script
            ghc
            ghcHEAD
            ghc8_2
            ghc8_0
            ghc7
            ghc7_8
            ghcIosSimulator64
  