This one we don't install any gtk/wx craziness, and the whole thing becomes much faster as a result.
--no-install-recommends is a big help, whether we're installing all of `erlang` or just `erlang-wx`, but `erlang-wx` is still so close in size that we still just use `erlang`.
Not functionally different, zx just needs the .zrf files to find gajumine.