anchor.diff:  
     checkInputs = [
       pytestCheckHook
  +  ];
  +
  +  disabledTests = [
  +    # slight disagreement between caastepxbin versions
  +    "test_castep_phonon_read_bands"
     ];
   
     postPatch = ''
  
positive.code: , buildPythonPackage
  , fetchFromGitHub
  , pythonOlder
  , h5py
  , matplotlib
  , numpy
  
negative.code:     sha256 = "1vwqyv215yf51j1278cn7l8mpqmy1grm9j7z3hxjlz4w65cff324";
    };
  
    nativeBuildInputs = [
      cython
    ];
  
    propagatedBuildInputs = [
      spglib
      numpy
  