anchor.diff:      owner = "lanpa";
       repo = "tensorboardX";
       rev = "v${version}";
  -    sha256 = "1kcw062bcqvqva5kag9j7q72wk3vdqgf5cnn0lxmsvhlmq5sjdfn";
  +    sha256 = "sha256-1jWpC64Ubl07Bday4h5ue0wuDj4yPTWL2nhjtoQBnM0=";
     };
   
     # apparently torch API changed a bit at 1.6
  
positive.code:       "torch.onnx.select_model_mode_for_export(model, torch.onnx.TrainingMode.EVAL)"
    '';
  
    propagatedBuildInputs = [
      crc32c
      numpy
      protobuf
      six
      soundfile
    ];
  
negative.code: { boto3
  , buildPythonPackage
  , crc32c
  , which
  , fetchFromGitHub
  , lib
  , matplotlib
  , moto
  , numpy
  , pillow
  , protobuf3_8
  , pytestCheckHook
  , pytorch
  , six
  