anchor.diff:      "test_colorize_file"
       "test_loading_correctly"
       "test_no_command_path_completion"
  +    "test_bsd_man_page_completions"
  +    "test_xonsh_activator"
       # fails on non-interactive shells
       "test_capture_always"
       "test_casting"
  
positive.code: 
  python3Packages.buildPythonApplication rec {
    pname = "xonsh";
    version = "0.11.0";
  
    # fetch from github because the pypi package ships incomplete tests
    src = fetchFromGitHub {
      owner = "xonsh";
      repo = "xonsh";
      rev = version;
      sha256 = "sha256-jfxQMEVABTOhx679V0iGVX9RisuY42lSdztYXMLwdcw=";
    };
  
    LC_ALL = "en_US.UTF-8";
  
negative.code:   ];
  
    postInstall = ''
      wrapProgram $out/bin/xonsh \
        $makeWrapperArgs
    '';
  
  