anchor.diff:      cp -a contrib $out/share/koka/v${version}
       cp -a kklib $out/share/koka/v${version}
       wrapProgram "$out/bin/koka" \
  -      --set CC "${lib.getBin buildPackages.stdenv.cc}/bin/${buildPackages.stdenv.cc.targetPrefix}cc" \
  +      --set CC "${lib.getBin cc}/bin/${cc.targetPrefix}cc" \
         --prefix PATH : "${lib.makeSearchPath "bin" runtimeDeps}"
     '';
     doCheck = false;
  
positive.code: { stdenv, buildPackages, cmake, gnumake, makeWrapper, mkDerivation, fetchFromGitHub
  , alex, array, base, bytestring, cond, containers, directory, extra
  , filepath, haskeline, hpack, hspec, hspec-core, json, lib, mtl
  , parsec, process, regex-compat, text, time }:
  
negative.code:     src = "${src}/kklib";
      nativeBuildInputs = [ cmake ];
    };
    inherit (pkgsHostTarget.targetPackages.stdenv) cc;
    runtimeDeps = [
      cc
      cc.bintools.bintools
      pkgsHostTarget.gnumake
      pkgsHostTarget.cmake
    ];
  in
  mkDerivation rec {
  