anchor.diff:  
     whisper = buildPythonPackage rec {
       name = "whisper-${version}";
  -    version = "0.9.10";
  -
  -    src = fetchurl rec {
  -      url = "https://launchpad.net/graphite/0.9/${version}/+download/${name}.tar.gz";
  -      sha256 = "1zy4z4hrbiqj4ipcv2m9197hf03d4xphllqav9w4c8i6fn8zmd9n";
  +    version = "0.9.12";
  +
  +    src = fetchurl {
  +      url = "https://pypi.python.org/packages/source/w/whisper/${name}.tar.gz";
  +      md5 = "5fac757cc4822ab0678dbe0d781d904e";
       };
   
       # error: invalid command 'test'
       doCheck = false;
   
  -    meta = {
  +    meta = with stdenv.lib; {
         homepage = http://graphite.wikidot.com/;
         description = "Fixed size round-robin style database";
  -      maintainers = [ stdenv.lib.maintainers.rickynils ];
  +      maintainers = with maintainers; [ rickynils offline ];
       };
     };
   
     carbon = buildPythonPackage rec {
       name = "carbon-${version}";
  -    version = "0.9.10";
  -
  -    src = fetchurl rec {
  -      url = "https://launchpad.net/graphite/0.9/${version}/+download/${name}.tar.gz";
  -      sha256 = "0wjhd87pvpcpvaj3wql2d92g8lpp33iwmxdkp7npic5mjl2y0dsg";
  +    version = "0.9.12";
  +
  +    src = fetchurl {
  +      url = "https://pypi.python.org/packages/source/c/carbon/${name}.tar.gz";
  +      md5 = "66967d5a622fd29973838fcd10eb34f3";
       };
   
       propagatedBuildInputs = [ whisper txamqp zope_interface twisted ];
  
positive.code:   });
  
    twisted = buildPythonPackage rec {
      name = "twisted-13.2.0";
  
      src = fetchurl {
        url = "https://pypi.python.org/packages/source/T/Twisted/Twisted-13.2.0.tar.bz2";
        sha256 = "1wrcqv5lvgwk2aq83qb2s2ng2vx14hbjjk2gc30cg6h1iiipal89";
      };
  
      propagatedBuildInputs = [ zope_interface ];
  
negative.code:     # error: invalid command 'test'
      doCheck = false;
  
      meta = with stdenv.lib; {
        homepage = http://graphite.wikidot.com/;
        description = "Enterprise scalable realtime graphing";
        maintainers = with maintainers; [ rickynils offline ];
      };
    };
  
  