I had the Intel Media Driver installed on this system at some point in
the distant past, and it installed /etc/profile.d/intel-media.sh - which
overrode the libva-intel-driver, and caused gstvaapi.so to fail to load
correctly on Wayland... which then caused GDM to fail to start. Note
that X11 worked fine because of using a different code path.
dconf is needed for non-DESTDIR install.
gtk3 is not directly used, but through libcanberra.
libdaemon is not used at all (I can't even find any Git history about it
in the upstream repo).
itstool is mentioned by some .po files but it seems the package actually
uses gettext instead of itstool. The NEWS mentions "switching from
intltool to gettext" so it seems itstool has never been really used at
all, too.
iso-codes seems not used. It was introduced for a language chooser
dialog 15 years ago (!) but the dialog is no more.
