anchor.diff:            ghcAndroidAarch64
             ghcAndroidAarch32
             ghcjs
  -          ghcjs8_2_2
  -          ghcjs8_4_3
  +          ghcjs8_2
  +          ghcjs8_4
             ghcSavedSplices
             android
             androidWithHaskellPackages
  
positive.code:       inherit (nixpkgs) lib;
        androidActivity = hackGet ./android-activity;
      };
      ghcjs8_2_2Packages = nixpkgs.callPackage (nixpkgs.path + "/pkgs/development/haskell-modules") {
        ghc = ghc8_2.ghcjs;
        buildHaskellPackages = ghc8_2.ghcjs.bootPkgs;
        compilerConfig = nixpkgs.callPackage (nixpkgs.path + "/pkgs/development/haskell-modules/configuration-ghc-8.2.x.nix") { inherit haskellLib; };
        packageSetConfig = nixpkgs.callPackage (nixpkgs.path + "/pkgs/development/haskell-modules/configuration-ghcjs.nix") { inherit haskellLib; };
        inherit haskellLib;
      };
      ghcjs8_4_3Packages = nixpkgs.callPackage (nixpkgs.path + "/pkgs/development/haskell-modules") {
        ghc = ghc8_4_3.ghcjs;
        buildHaskellPackages = ghc8_4_3.ghcjs.bootPkgs;
        compilerConfig = nixpkgs.callPackage (nixpkgs.path + "/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix") { inherit haskellLib; };
        packageSetConfig = nixpkgs.callPackage (nixpkgs.path + "/pkgs/development/haskell-modules/configuration-ghcjs.nix") { inherit haskellLib; };
        inherit haskellLib;
      };
    ghc = ghc8_4_3;
    ghcSavedSplices = (extendHaskellPackages nixpkgs.pkgs.haskell.packages.ghcSplices).override {
      overrides = lib.foldr lib.composeExtensions (_: _: {}) [
        (optionalExtension enableExposeAllUnfoldings haskellOverlays.exposeAllUnfoldings)
  
negative.code:       haskellOverlays.saveSplices
      ];
    };
    ghcjs8_2 = (extendHaskellPackages ghcjs8_2Packages).override {
      overrides = lib.foldr lib.composeExtensions (_: _: {}) [
        (optionalExtension enableExposeAllUnfoldings haskellOverlays.exposeAllUnfoldings)
        haskellOverlays.ghcjs
        (optionalExtension useTextJSString haskellOverlays.textJSString)
      ];
    };
    ghcjs8_4 = (extendHaskellPackages ghcjs8_4Packages).override {
      overrides = lib.foldr lib.composeExtensions (_: _: {}) [
        (optionalExtension enableExposeAllUnfoldings haskellOverlays.exposeAllUnfoldings)
        haskellOverlays.ghcjs-8_4
        (optionalExtension useTextJSString haskellOverlays.textJSString)
      ];
    };
    ghcjs = ghcjs8_4;
    ghcHEAD = (extendHaskellPackages nixpkgs.pkgs.haskell.packages.ghcHEAD).override {
      overrides = lib.foldr lib.composeExtensions (_: _: {}) [
        (optionalExtension enableExposeAllUnfoldings haskellOverlays.exposeAllUnfoldings)
        haskellOverlays.ghc-head
      ];
    };
    ghc8_4 = (extendHaskellPackages nixpkgs.pkgs.haskell.packages.ghc843).override {
      overrides = lib.foldr lib.composeExtensions (_: _: {}) [
        (optionalExtension enableExposeAllUnfoldings haskellOverlays.exposeAllUnfoldings)
        (ghcjsPkgs (useTextJSStringAsBootPkg (nixpkgs.pkgs.haskell.compiler.ghcjs84.override {
  