anchor.diff:      owner = "pytorch";
       repo = pname;
       rev = "v${version}";
  -    sha256 = "057v8v5p2picmgiidr9lzjbh7nj54pv95m6lyya3y7dw4vzaamij";
  +    sha256 = "sha256-FGFpaqq7InwRqFmQTmXGpJEjRUB69ZN/l20l42L2BAA=";
     };
   
     checkInputs = [ pytestCheckHook matplotlib mock pytest-xdist ];
  
positive.code:   # models, which doesn't work in the sandbox.
    # avoid tests which need special packages
    pytestFlagsArray = [
      "--ignore=tests/ignite/contrib/handlers/test_trains_logger.py"
      "--ignore=tests/ignite/metrics/test_dill.py"
      "--ignore=tests/ignite/metrics/test_ssim.py"
      "tests/"
    ];
  
negative.code:   # disable tests which need specific packages
    disabledTests = [
      "idist"
      "mlflow"
      "tensorboard"
      "test_integration"
      "test_output_handler" # needs mlflow
      "test_pbar" # slight output differences
      "test_setup_clearml_logging"
      "test_setup_neptune"
      "test_setup_plx"
      "test_write_results"
      "trains"
      "visdom"
    ];
  
    meta = with lib; {
  