anchor.diff:    '';
   
     configurePhase = ''
  -    python2 ./configure.py --prefix=$out
  +    ${python.interpreter} ./configure.py --prefix=$out
     '';
   
     meta = with stdenv.lib; {
  
positive.code: { stdenv, fetchFromGitHub, python, llvm, clang }:
  
  stdenv.mkDerivation {
    name = "libclc-2015-08-07";
  
negative.code:     sha256 = "10n9qk1dild9yjkjjkzpmp9zid3ysdgvqrad554azcf755frch7g";
    };
  
    buildInputs = [ python2 llvm clang ];
  
    postPatch = ''
      sed -i 's,llvm_clang =.*,llvm_clang = "${clang}/bin/clang",' configure.py
  