anchor.diff:  , glibcLocales
   , coreutils
   , git
  +, python3
   }:
   
   python3Packages.buildPythonApplication rec {
     pname = "xonsh";
  -  version = "0.9.13";
  +  version = "0.9.14";
   
     # fetch from github because the pypi package ships incomplete tests
     src = fetchFromGitHub {
       owner  = "xonsh";
       repo   = "xonsh";
  -    rev    = "refs/tags/${version}";
  -    sha256 = "0nk6rjdkbxli510iwqspvray48kdxvbdmq1k8nxn14kqfpqzlbcv";
  +    rev    = version;
  +    sha256 = "03g8ilg4dxin3v3rzccdxx9zf8rvyqpxakn1dlpqbgsnwdwa19p4";
     };
  -
  -  patches = [
  -    (fetchpatch {
  -      name = "fix-ptk-tests.patch";
  -      url = "https://github.com/xonsh/xonsh/commit/ca7acecc968dcda7dd56c1f5d5b4df349c98d734.patch";
  -      sha256 = "00nhbf9wzm6r86r9zq8mnhds30w6gdhkgsx5kpl0jppiz4ll96iw";
  -    })
  -  ];
   
     LC_ALL = "en_US.UTF-8";
     postPatch = ''
  
positive.code: 
      sed -ie 's|/usr/bin/env|${coreutils}/bin/env|' tests/test_integrations.py
      sed -ie 's|/usr/bin/env|${coreutils}/bin/env|' scripts/xon.sh
      find -name "*.xsh" | xargs sed -ie 's|/usr/bin/env|${coreutils}/bin/env|'
      patchShebangs .
    '';
  
negative.code:   doCheck = !stdenv.isDarwin;
  
    checkPhase = ''
      HOME=$TMPDIR pytest -k 'not test_repath_backslash and not test_os and not test_man_completion and not test_builtins and not test_main and not test_ptk_highlight and not test_pyghooks'
      HOME=$TMPDIR pytest -k 'test_builtins or test_main' --reruns 5
      HOME=$TMPDIR pytest -k 'test_ptk_highlight'
    '';
  