anchor.diff:      };
     };
   
  +  enum34 = buildPythonPackage rec {
  +    name = "enum34-1.0";
  +
  +    src = fetchurl {
  +      url = "http://pypi.python.org/packages/source/e/enum34/${name}.tar.gz";
  +      md5 = "9d57f5454c70c11707998ea26c1b0a7c";
  +    };
  +
  +  };
   
     epc = buildPythonPackage rec {
       name = "epc-0.0.3";
  
positive.code: 
  
    musicbrainzngs = buildPythonPackage rec {
      name = "musicbrainzngs-0.2";
  
      src = fetchurl {
        url = "http://pypi.python.org/packages/source/m/musicbrainzngs/${name}.tar.gz";
        md5 = "bc32aa1cf121f29c3ca1c06e9668865f";
      };
  
      meta = {
  
negative.code: 
  
    six = buildPythonPackage rec {
      name = "six-1.7.3";
  
      src = fetchurl {
        url = "http://pypi.python.org/packages/source/s/six/${name}.tar.gz";
        md5 = "784c6e5541c3c4952de9c0a966a0a80b";
      };
  
      # error: invalid command 'test'
  