anchor.diff:  
     postPatch = ''
       substituteInPlace setup.py \
  -      --replace "tokenizers == 0.9.3" "tokenizers" \
  -      --replace "sentencepiece == 0.1.91" "sentencepiece"
  +      --replace "tokenizers == 0.9.4" "tokenizers"
     '';
   
     preCheck = ''
  
positive.code: , parameterized
  , protobuf
  , sacremoses
  , sentencepiece
  , timeout-decorator
  , tokenizers
  , tqdm
  
negative.code: , stdenv
  , fetchFromGitHub
  , boto3
  , cookiecutter
  , filelock
  , regex
  , requests
  