
When we did the revert of adding gnome-flashback to systemd.packages [0] I forgot to test with other display managers. If we use GDM with gnome-flashback it appears it doesn't try to fallback to non-systemd startup and always fails and starts the regular gnome-session. So adding gnome-flashback to systemd.packages was perfectly fine, but we did forgot one detail. We need systemd targets for the customSessions which is added using mkSystemdTargetForWm in the gnome- flashback package. [0]: 42f567b30def552337bf17a6d30410c16c2b47cc
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