anchor.diff:      inherit pname version;
       sha256 = "0xndv47iwc9k8cp5r9r1z3r0xww0r5x5b7qsmn39gk2gsg0119c6";
     };
  +
  +  propagatedBuildInputs = lib.optionals isPy27 [ selectors2 ];
   
     checkInputs = [ mock pytest ];
   
  
positive.code: { lib
  , buildPythonPackage
  , fetchPypi
  , mock
  , pytest
  }:
  
  buildPythonPackage rec {
  
negative.code:     homepage = https://github.com/minrk/wurlitzer;
      license = lib.licenses.mit;
    };
  }
  