anchor.diff:    };
     ghcHEAD = (makeRecursivelyOverridable nixpkgs.haskell.packages.ghcHEAD).override {
       overrides = lib.foldr lib.composeExtensions (_: _: {}) (let
  -      haskellOverlays = mkHaskellOverlays nixpkgs;
  +      haskellOverlays = nixpkgs.haskell.overlays;
       in [
         haskellOverlays.reflexPackages
         haskellOverlays.untriaged
  
positive.code:           };
          };
        })
      ] ++ nixpkgsOverlays;
  
      appleLibiconvHack = self: super: {
  
negative.code:   };
    ghc7_8 = (makeRecursivelyOverridable nixpkgs.haskell.packages.ghc784).override {
      overrides = lib.foldr lib.composeExtensions (_: _: {}) (let
        haskellOverlays = nixpkgs.haskell.overlays;
      in [
        haskellOverlays.reflexPackages
        haskellOverlays.untriaged
  