anchor.diff:  , token
   } :
   let
  -  version = "2015.1.33";
  +  version = "2015.1.38";
   
   in stdenv.mkDerivation {
     name = "molpro-${version}";
  
positive.code:   dontStrip = true;
  
    meta = with stdenv.lib; {
      description = "Quantum program package";
      homepage = https://www.molpro.net;
      licenses = licences.unfree;
      platforms = [ "x86_64-linux" ];
    };
  }
  
negative.code:   src = localFile {
      website = http://www.molpro.net;
      srcfile = "molpro-mpp-${version}.linux_x86_64_openmp.sh.gz";
      sha256 = "15rkf1q0f4sf2ya4jb54ivy4zybzkz07n0g8d7vcaxx0m73lxnk6";
    };
  
    buildInputs = [ python ];
  