anchor.diff:  
     sources = {
       stable = {
  -      version = "3.0.3";
  -      sha256 = "590cfaac6adbc65a0297f7b2a44c2accf2cc660eeed6283b43cbad30e65806e0";
  +      version = "3.0.4";
  +      sha256 = "37803ec0d7f20f2e1425dfe3bb978dc3b9c65872aa3760c664b31a9115232ec1";
       };
       head = {
         fetchzipversion = 6;
  
positive.code:         inherit (source) rev sha256;
        };
  
    nativeBuildInputs = optionals doCheck [
      pytest
      pytest-benchmark
      pytest-capturelog
      pyyaml
    ];
  
    propagatedBuildInputs = [
      babelfish
      pytest-runner
      python-dateutil
      rebulk
      regex
    ];
  
    doCheck = false;
  
    meta = with lib; {
      description = "A library for guessing information from video filenames";
      homepage = https://pypi.python.org/pypi/guessit;
      license = licenses.lgpl3;
      maintainers = with maintainers; [
        codyopel
  
negative.code: , pytest-runner
  , python-dateutil
  , rebulk
  
  , channel ? "stable"
  }:
  