Apologies if nobody else is interested in this, but it seems an important issue
to me!

I have completed test builds of all the ceres source packages with
Build-Depends: systemd using dummy-systemd-dev.

111 Total source packages

Of these

75 Compilation successful

7 Build dependencies still not satisfiable (usually a libsystemd0/elogind/polkit conflict)[1]:

     gnome-settings-daemon, gdm3, gnome-shell, gnome-initial-setup, gvfs, fwupd,
     rust-zram-generator, neard, cluster-glue

 12 Skipped because 1 or more binary has a systemd dependency and is not in
    Devuan:

     dbus-broker, kde-config-systemd, rauc, cockpit, clevis, netplan.io,
     debspawn, oddjob, rust-whoami, netctl, ayatana-indicator-session,
     kde-config-systemd

     Maybe amprolla could do a better job of filtering these? I will look at that.

15 Compilation failed:

     ayatana-indicator-datetime, crowdsec, dnsdist, e17, hddemux, libvma,
     libwacom, lirc, lvm2, owfs, pacemaker, pdns, tracker-miners, usbguard,
     xdg-desktop-portal-wlr

The logs of the builds are at https://hindley.org.uk/~mark/devuan/test-build-dep-systemd.sh.logs

Mark

[1] Of these unsatisfiable build dependencies at least the following are
    unrelated to systemd:
     - cluster-glue: FTBFS, depends libltdl3-dev (#1008889)
     - neard: Depends: python but it is not installable. Pending removal: #1008499