anchor.diff: -{ stdenv, buildPackages, cmake, gnumake, makeWrapper, mkDerivation, fetchFromGitHub
  +{ stdenv, pkgsHostTarget, cmake, 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 }:
  
positive.code:     src = "${src}/kklib";
      nativeBuildInputs = [ cmake ];
    };
    runtimeDeps = [
      buildPackages.stdenv.cc
      buildPackages.stdenv.cc.bintools.bintools
      gnumake
      cmake
    ];
  in
  mkDerivation rec {
  
negative.code:     cp -a contrib $out/share/koka/v${version}
      cp -a kklib $out/share/koka/v${version}
      wrapProgram "$out/bin/koka" \
        --set CC "${lib.getBin cc}/bin/${cc.targetPrefix}cc" \
        --prefix PATH : "${lib.makeSearchPath "bin" runtimeDeps}"
    '';
    doCheck = false;
  