anchor.diff:  
   buildPythonPackage rec {
     pname = "h2";
  -  version = "4.0.0";
  +  version = "4.1.0";
     format = "setuptools";
  +
     disabled = pythonOlder "3.6";
   
     src = fetchPypi {
       inherit pname version;
  -    sha256 = "bb7ac7099dd67a857ed52c815a6192b6b1f5ba6b516237fc24a085341340593d";
  +    sha256 = "sha256-qDrKCPvnqst5/seIycC6yTY0NWDtnsGLgqE6EsKNKrs=";
     };
  -
  -  patches = [
  -    # Workaround issues with hypothesis 6.6
  -    # https://github.com/python-hyper/h2/pull/1248
  -    (fetchpatch {
  -      url = "https://github.com/python-hyper/h2/commit/0646279dab694a89562846c810202ce2c0b49be3.patch";
  -      sha256 = "1k0fsxwq9wbv15sc9ixls4qmxxghlzpflf3awm66ar9m2ikahiak";
  -    })
  -  ];
   
     propagatedBuildInputs = [
       hpack
  
positive.code:     description = "HTTP/2 State-Machine based protocol implementation";
      homepage = "http://hyper.rtfd.org/";
      license = licenses.mit;
    };
  }
  
negative.code: , buildPythonPackage
  , pythonOlder
  , fetchPypi
  , hpack
  , hyperframe
  , pytestCheckHook
  