anchor.diff:      owner = "dask";
       repo = pname;
       rev = version;
  -    sha256 = "V2cEOzV/L1zjyQ76zlGyN9CIkq6W8y8Yab4NQi3/Ju4=";
  +    sha256 = "LACv7lWpQULQknNGX/9vH9ckLsypbqKDGnsNBgKT1eI=";
     };
   
     checkInputs = [
       pytestCheckHook
  +    pytest-rerunfailures
     ];
   
     dontUseSetuptoolsCheck = true;
  
positive.code: , fetchFromGitHub
  , fsspec
  , pytestCheckHook
  , pythonOlder
  , cloudpickle
  , numpy
  
negative.code: 
  buildPythonPackage rec {
    pname = "dask";
    version = "2021.03.0";
  
    disabled = pythonOlder "3.5";
  
  