K interesting. I'll check this out, thanks.
Aug 9 2017
In whonix-ws the package is called anon-ws-dns-conf . Yes I'm sure about that. The build log explicitly says "Couldn't resolve host".
Nope, tb-updater getting installed in whonix-gw doesn't cause this issue.
IMO the chain doesn't solve the issue of tb-updater not getting any internet connectivity during postinst, which is the root cause of this issue ("Couldn't resolve host. The given remote host was not resolved").