anchor.diff:      changelog = "https://github.com/xonsh/xonsh/raw/${version}/CHANGELOG.rst";
       license = licenses.bsd3;
       maintainers = with maintainers; [ spwhitt vrthra ];
  -    platforms = platforms.all;
     };
   
     passthru = {
  
positive.code: { lib, stdenv
  , fetchFromGitHub
  , python3Packages
  , glibcLocales
  
negative.code: 
  python3Packages.buildPythonApplication rec {
    pname = "xonsh";
    version = "0.10.1";
  
    # fetch from github because the pypi package ships incomplete tests
    src = fetchFromGitHub {
      owner = "xonsh";
      repo = "xonsh";
      rev = version;
      sha256 = "03ahay2rl98a9k4pqkxksmj6mcg554jnbhw9jh8cyvjrygrpcpch";
    };
  
    LC_ALL = "en_US.UTF-8";
  