anchor.diff:      # pandoc
       git
       mock
  -    nose
       markdown
       typogrify
     ];
  
positive.code:     owner = "getpelican";
      repo = "pelican";
      rev = version;
      sha256 = "0ag8il1b8ckfcv0f87ryrmw52k9m3xd025b4m6fvr8lsffyzv626";
    };
  
    doCheck = true;
  
    checkPhase = ''
      python -Wd -m unittest discover
    '';
  
    buildInputs = [
  
negative.code:   propagatedBuildInputs = [
      jinja2 pygments docutils pytz unidecode six dateutil feedgenerator
      blinker pillow beautifulsoup4 markupsafe lxml
    ];
  
    checkInputs = [
      nose
    ];
  
    postPatch= ''
  