anchor.diff:      propagatedBuildInputs = with self ; [ pytest pytestcache pep8 ];
   
       meta = {
  -      license = stdenv.lib.licenses.mit;
  +      license = licenses.mit;
         website = "https://pypi.python.org/pypi/pytest-pep8";
         description = "pytest plugin to check PEP8 requirements";
       };
  
positive.code:     meta = {
        description = "Python implementation of the v3 API for TheMovieDB.org, allowing access to movie and cast information";
        homepage = http://pypi.python.org/pypi/tmdb3;
        license = stdenv.lib.licenses.bsd3;
      };
    };
  
  
negative.code:     buildInputs = with self; [ pkgs.libev ];
      propagatedBuildInputs = optionals (!isPyPy) [ self.greenlet ];
  
      meta = {
        description = "Coroutine-based networking library";
        homepage = http://www.gevent.org/;
        license = licenses.mit;
        platforms = platforms.linux;
        maintainers = with maintainers; [ bjornfor ];
      };
    };
  
  