anchor.diff:  
   buildPythonPackage rec {
     pname = "rokuecp";
  -  version = "0.12.0";
  -  format = "setuptools";
  +  version = "0.13.1";
  +  format = "pyproject";
   
  -  disabled = pythonOlder "3.8";
  +  disabled = pythonOlder "3.9";
   
     src = fetchFromGitHub {
       owner = "ctalkington";
       repo = "python-rokuecp";
       rev = version;
  -    sha256 = "1pqiba4zgx7knm1k53p6w6b9a81dalqfq2agdyrz3734nhl6gx1h";
  +    hash = "sha256-6bHEg7bpqldLDr3UX42GUg7kIDHVxtnVnrFr8CvTJU4=";
     };
  +
  +  nativeBuildInputs = [
  +    # Requires poetry not poetry-core
  +    poetry
  +  ];
   
     propagatedBuildInputs = [
       aiohttp
  +    backoff
       cachetools
       xmltodict
  +    awesomeversion
       yarl
     ];
   
  
positive.code:     pytestCheckHook
      pytest-asyncio
    ];
  
    disabledTests = [
      # https://github.com/ctalkington/python-rokuecp/issues/249
  
negative.code: { lib
  , aiohttp
  , aresponses
  , awesomeversion
  , backoff
  , buildPythonPackage
  , cachetools
  , fetchFromGitHub
  , poetry
  , pytest-asyncio
  , pytestCheckHook
  , pythonOlder
  