At least the `runlevel` part was there before:
https://travis-ci.org/geany/geany-plugins/jobs/306153614#L1085
Hum, interesting… maybe they added a `set -e` or alike in a new version, very possible as I think I remember Debian did that for startup scripts.
(and/or _why_ DBus is even being installed/started).
Because of GConf2, which we need for devhelp. Fairly enough, we don't need this for GTK3 builds as devhelp is GTK2-only. But oddly enough we install the same thing on both builds, and everything seems to be the same but one fails and the other doesn't… I really don't understand anything about this issue yet.