The current nethack-vultures uses a very old version of nethack. It is
bundled because a customized version is used to support the isometric view.
There exists source for a slight more recent version, but it is still
very old. The upstream web site is now dead and they weren't very good
about publishing source. So I can't get code from just a few years ago.
At this point, I don't think it is worth the work to support this
different UI for nethack.
If someone else wants to take it over, I'm fine with that. The latest
version I was able to find was 3.67. I don't seem to have a copy of
that, but old Debian releases probably have it. When I last looked at it,
going from the current Fedora version to 3.67 was a substantial amount of
work. The current version is crashing on start up, so even keeping the status
quo needs some work.