anchor.diff:        pymongo_2_9_1
         simplejson
         werkzeug
  -
       ];
   
       # tests call a running mongodb instance
  
positive.code:     };
    };
  
    easy-process = buildPythonPackage rec {
      name = "EasyProcess-0.1.9";
  
      src = pkgs.fetchurl {
        url = "mirror://pypi/E/EasyProcess/${name}.tar.gz";
        sha256 = "c9980c0b0eeab97969305d8829bed966a3e28a77284e4f45a9b38fb23ce83633";
      };
  
      meta = {
        description = "Easy to use python subprocess interface";
  
negative.code:   virtual-display = buildPythonPackage rec {
      name = "PyVirtualDisplay-0.1.5";
  
      propagatedBuildInputs = with self; [ EasyProcess ];
  
      src = pkgs.fetchurl {
        url = "mirror://pypi/P/PyVirtualDisplay/${name}.tar.gz";
  