anchor.diff:    });
   
   
  +  cairocffi = buildPythonPackage rec {
  +    name = "cairocffi-0.5.4";
  +
  +    src = fetchurl {
  +      url = "https://pypi.python.org/packages/source/c/cairocffi/${name}.tar.gz";
  +      md5 = "e3fa4002583bfaa88b156e1af9c75bde";
  +    };
  +
  +    propagatedBuildInputs = [ cffi ];
  +
  +    meta = {
  +      homepage = https://github.com/SimonSapin/cairocffi;
  +      license = "bsd";
  +      description = "cffi-based cairo bindings for Python";
  +    };
  +  };
  +
  +
     carrot = buildPythonPackage rec {
       name = "carrot-0.10.7";
   
  
positive.code:   };
  
  
    # XXX: ValueError: ZIP does not support timestamps before 1980
    # svneverever =  buildPythonPackage rec {
    #   name = "svneverever-778489a8";
  
negative.code:     meta = {
        homepage = http://flask.pocoo.org/;
        description = "A microframework based on Werkzeug, Jinja 2, and good intentions";
        license = "BSD";
      };
    };
  
    flask_cache = buildPythonPackage rec {
      name = "Flask-Cache-0.13.1";
  
      src = fetchurl {
        url = "https://pypi.python.org/packages/source/F/Flask-Cache/${name}.tar.gz";
        md5 = "ab82a9cd0844891ccdb54fbb93fd6c59";
      };
  
      propagatedBuildInputs = [ werkzeug flask ];
  
      meta = {
        homepage = https://github.com/thadeusb/flask-cache;
        description = "Adds cache support to your Flask application";
        license = "BSD";
      };
    };
  