anchor.diff:  
     preInstall = ''
       mkdir -p $out
  -    mkdir -p $out/site-packages
  +    mkdir -p $out/${python2.sitePackages}
     '';
   
     patches = [
  
positive.code: { lib, stdenv, fetchurl, fetchpatch, python }:
  
  stdenv.mkDerivation rec {
    name = "clearsilver-0.10.5";
  
negative.code:     sha256 = "1046m1dpq3nkgxbis2dr2x7hynmy51n64465q78d7pdgvqwa178y";
    };
  
    PYTHON_SITE = "${placeholder "out"}/${python2.sitePackages}";
  
    configureFlags = [
      "--with-python=${python2.interpreter}"
      "--disable-apache"
      "--disable-perl"
      "--disable-ruby"
  