anchor.diff:    pname = "cached-property";
     version = "1.4.0";
   
  -  src = fetchPypi {
  -    inherit pname version;
  -    sha256 = "a2fa0f89dd422f7e5dd992a4a3e0ce209d5d1e47a4db28fd0a7b5273ec8da3f0";
  +  # conftest.py is missing in PyPI tarball
  +  # https://github.com/pydanny/cached-property/pull/87
  +  src = fetchFromGitHub {
  +    owner = "pydanny";
  +    repo = pname;
  +    rev = version;
  +    sha256 = "0w7709grs4yqhfbnn7lva2fgyphvh43xcfqhi95lhh8sjad3xwkw";
     };
   
  -  checkInputs = [ freezegun ];
  +  checkInputs = [ pytest freezegun ];
  +
  +  checkPhase = ''
  +    py.test
  +  '';
   
     meta = {
       description = "A decorator for caching properties in classes";
  
positive.code: { lib
  , buildPythonPackage
  , fetchPypi
  , freezegun
  }:
  
  
negative.code:     platforms = lib.platforms.unix;
      maintainers = with lib.maintainers; [ ericsagnes ];
    };
  }
  