anchor.diff:      "test_hf_api"
       "test_outputs_can_be_shorter"
       "test_outputs_not_longer_than_maxlen"
  +    "test_padding_accepts_tensors"
       "test_pretokenized_tokenizers"
       "test_tokenizer_equivalence_en_de"
       "test_tokenizer_from_model_type"
  
positive.code: 
    postPatch = ''
      substituteInPlace setup.py \
        --replace "tokenizers == 0.8.1.rc1" "tokenizers>=0.8"
    '';
  
    preCheck = ''
      export HOME="$TMPDIR"
      cd tests
    '';
  
    # Disable tests that require network access.
    disabledTests = [
      "test_all_tokenizers"
      "test_batch_encoding_is_fast"
      "test_batch_encoding_pickle"
  
negative.code: 
  buildPythonPackage rec {
    pname = "transformers";
    version = "3.1.0";
  
    src = fetchFromGitHub {
      owner = "huggingface";
      repo = pname;
      rev = "v${version}";
      sha256 = "0wg36qrcljmpsyhjaxpqw3s1r6276yg8cq0bjrf52l4zlc5k4xzk";
    };
  
    propagatedBuildInputs = [
  