anchor.diff:  
     src = fetchPypi {
       inherit pname version;
  -    sha256 = "427af957daa58bc909471c6c40f74c5450fa123dd093fc53efd2e91d2705a56b";
  +    sha256 = "0sx50lkivsfjxx9zr4yh7l9gll2l9kvl0v0w8w4wk2x5v9bzjyj2";
     };
   
     propagatedBuildInputs = [ idna ]
  
positive.code: { lib, buildPythonPackage, fetchPypi, isPy27, idna, typing ? null }:
  
  buildPythonPackage rec {
    pname = "hyperlink";
  
negative.code: 
    meta = with lib; {
      description = "A featureful, correct URL for Python";
      homepage = "https://github.com/python-hyper/hyperlink";
      license = licenses.mit;
      platforms = platforms.all;
      maintainers = with maintainers; [ apeschar ];
  