anchor.diff:  
     meta = with lib; {
       description = "Python framework for building analytical web applications";
  -    homepage = https://dash.plot.ly/;
  +    homepage = "https://dash.plot.ly/";
       license = licenses.mit;
       maintainers = [ maintainers.antoinerg ];
     };
  
positive.code:   ];
  
    checkPhase = ''
      pytest tests/unit/test_configs.py
      pytest tests/unit/test_fingerprint.py
      pytest tests/unit/test_import.py
      pytest tests/unit/test_resources.py
      pytest tests/unit/dash/
    '';
  
    pythonImportsCheck = [
  
negative.code: 
  buildPythonPackage rec {
    pname = "dash";
    version = "1.9.1";
  
    src = fetchFromGitHub {
      owner = "plotly";
      repo = pname;
      rev = "v${version}";
      sha256 = "0lqvcq7xaw5l1mwmgfdhr9jspq8jzkxf77862k0ca4d9zglkqp4z";
    };
  
    propagatedBuildInputs = [
  