anchor.diff:  
     src = fetchPypi {
       inherit pname version;
  -    sha256 = "sha256-hhTAD7ilBG3jBP3Ybb0iT5lAgYXXskWsZijQJ2WW5tI=";
  +    hash = "sha256-hhTAD7ilBG3jBP3Ybb0iT5lAgYXXskWsZijQJ2WW5tI=";
     };
  +
  +  patches = [
  +    (fetchpatch {
  +      # Fix test_num2date_precision by checking per platform precision
  +      url = "https://github.com/Unidata/cftime/commit/221ff2195d588a43a7984597033b678f330fbc41.patch";
  +      hash = "sha256-3XTJuET20g9QElM/8WGnNzJBFZ0oUN4ikhWKppwcyNM=";
  +    })
  +  ];
  +
  +  postPatch = ''
  +    sed -i "/--cov/d" setup.cfg
  +  '';
  +
   
     nativeBuildInputs = [
       cython
  
positive.code: , buildPythonPackage
  , cython
  , fetchPypi
  , numpy
  , pytestCheckHook
  , pythonOlder
  
negative.code:     pytestCheckHook
    ];
  
    pythonImportsCheck = [
      "cftime"
    ];
  