anchor.diff:          ''-e 's/${package}.*[<>=]+.*/${package}/g' \''
         ) relaxedConstraints)}
       requirements.txt
  -    sed -i '/tensorboardX/d' requirements.txt
     '';
   
     nativeBuildInputs = with python.pkgs; [
  
positive.code: in
  python.pkgs.buildPythonApplication rec {
    pname = "tts";
    version = "0.8.0";
    format = "setuptools";
  
    src = fetchFromGitHub {
      owner = "coqui-ai";
      repo = "TTS";
      rev = "v${version}";
      sha256 = "sha256-A48L1JGXckSEaZra00ZOBVxcYJMvhpQqzE8nABaP0TY=";
    };
  
    postPatch = let
  
negative.code: 
    disabledTests = [
      # Requires network acccess to download models
      "test_korean_text_to_phonemes"
      "test_models_offset_0_step_3"
      "test_models_offset_1_step_3"
      "test_models_offset_2_step_3"
      "test_run_all_models"
      "test_synthesize"
      "test_voice_conversion"
      # Mismatch between phonemes
      "test_text_to_ids_phonemes_with_eos_bos_and_blank"
      # Takes too long
      "test_parametrized_wavernn_dataset"
    ];
  
    disabledTestPaths = [
  