anchor.diff:      coqpit
       flask
       fsspec
  +    g2pkk
       gdown
       gruut
       inflect
  +    jamo
       jieba
       librosa
       matplotlib
       mecab-python3
  +    nltk
       numba
       pandas
       pypinyin
       pysbd
  -    pyworld
       scipy
       soundfile
       tensorflow
  
positive.code:       "numpy"
        "umap-learn"
        "unidic-lite"
        "pyworld"
      ];
    in ''
      sed -r -i \
  
negative.code:         ''-e 's/${package}.*[<>=]+.*/${package}/g' \''
        ) relaxedConstraints)}
      requirements.txt
    '';
  
    nativeBuildInputs = with python.pkgs; [
  