{
  mkShell,
  python3Packages,
}: let
  inherit (python3Packages) python venvShellHook;
in
  mkShell {
    name = "impurePythonEnv";
    venvDir = "./.venv";
    buildInputs = [
      python

      venvShellHook
    ];

    # Run this command, only after creating the virtual environment
    postVenvCreation = ''
      unset SOURCE_DATE_EPOCH
      pip install kathara
    '';

    # Now we can execute any commands within the virtual environment.
    # This is optional and can be left out to run pip manually.
    postShellHook = ''
      # allow pip to install wheels
      unset SOURCE_DATE_EPOCH
    '';
  }