timekpr: avoid using an env variable (#488548)

  sound-theme-freedesktop,

  stdenv,

  wrapGAppsHook4,

  writeText,

}:

python3Packages.buildPythonApplication rec {

  pname = "timekpr";

    psutil

  ];

  postPatch =

    let

      # Generate setup.py because the upstream repository does not include it

  SETUP_PY = ''

      setup-py = writeText "setup.py" ''

        from setuptools import setup, find_namespace_packages

        package_dir={"timekpr": "."}

          ],

        )

      '';

  postPatch = ''

    in

    ''

      shopt -s globstar extglob nullglob

      substituteInPlace bin/* **/*.py resource/server/systemd/timekpr.service \

      substituteInPlace client/admin/adminprocessor.py \

        --replace-fail '"/timekpra" in ' '"/..timekpra-wrapped-wrapped" in '

    printf %s "$SETUP_PY" > setup.py

      ln -s ${setup-py} setup.py

    '';

  # We need to manually inject $PYTHONPATH here, because `buildPythonApplication` does not recognize timekpr's executables as Python scripts, and therefore it does not automatically inject $PYTHONPATH into them.