anchor.diff:    meta = with stdenv.lib; {
       homepage = "https://github.com/huggingface/transformers";
       description = "State-of-the-art Natural Language Processing for TensorFlow 2.0 and PyTorch";
  +    changelog = "https://github.com/huggingface/transformers/releases/tag/v${version}";
       license = licenses.asl20;
       platforms = platforms.unix;
       maintainers = with maintainers; [ danieldk pashashocky ];
  
positive.code: 
  buildPythonPackage rec {
    pname = "transformers";
    version = "3.0.2";
  
    src = fetchFromGitHub {
      owner = "huggingface";
      repo = pname;
      rev = "v${version}";
      sha256 = "0rdlikh2qilwd0s9f3zif51p1q7sp3amxaccqic8p5qm6dqpfpz6";
    };
  
    propagatedBuildInputs = [
  
negative.code:     "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"
  