anchor.diff:      };
   
       propagatedBuildInputs = with self; [
  -      dateutil_2_1 requests stevedore babelfish pyyaml
  +      dateutil_1_5 requests stevedore babelfish pyyaml
       ];
   
       # A unicode test fails
  
positive.code:     };
    });
  
    dateutil_2_1 = buildPythonPackage (rec {
      name = "dateutil-2.1";
  
      src = fetchurl {
        url = "http://pypi.python.org/packages/source/p/python-dateutil/python-${name}.tar.gz";
        sha256 = "1vlx0lpsxjxz64pz87csx800cwfqznjyr2y7nk3vhmzhkwzyqi2c";
      };
  
      propagatedBuildInputs = [ pythonPackages.six ];
  
      meta = {
        description = "Powerful extensions to the standard datetime module";
        homepage = http://pypi.python.org/pypi/python-dateutil;
        license = stdenv.lib.licenses.bsd3;
      };
    });
  
    # Buildbot 0.8.7p1 needs dateutil==1.5
    dateutil_1_5 = buildPythonPackage (rec {
      name = "dateutil-1.5";
  
negative.code:     buildInputs = with self; [ nose ];
      propagatedBuildInputs = with self; [ paver feedparser sqlalchemy pyyaml rpyc
  	    beautifulsoup4 html5lib pyrss2gen pynzb progressbar jinja2 flask
  	    cherrypy requests dateutil_1_5 jsonschema python_tvrage tmdb3
              guessit pathpy
          ]
  	# enable deluge and transmission plugin support, if they're installed
  