_7zz: fix passing package to tests

, enableUnfree ? false

  # For tests

, _7zz

, testers

}:

  passthru = {

    updateScript = ./update.sh;

    tests.version = testers.testVersion {

      package = _7zz;

      package = finalAttrs.finalPackage;

      command = "7zz --help";

    };

  };