anchor.diff:  { lib
  -, python3Packages
  +, python38
   , fetchFromGitHub
  -, python3
   , fetchpatch
   }:
   
  
positive.code: # For now, for deployment check the systemd unit in the pull request:
  #   https://github.com/NixOS/nixpkgs/pull/103851#issue-521121136
  
  python3Packages.buildPythonApplication rec {
    pname = "tts";
    version = "0.0.15.1";
  
    src = fetchFromGitHub {
      owner = "coqui-ai";
  
negative.code:     # cython modules are not installed for some reasons
      (
        cd TTS/tts/layers/glow_tts/monotonic_align
        ${python3.interpreter} setup.py install --prefix=$out
      )
    '';
  
    checkInputs = with python3.pkgs; [
      pytest-sugar
      pytestCheckHook
    ];
  