Does anyone know what could have disabled ALL my #zfs systemd units on #debian #linux? All these units..

zfs-import-cache.service
zfs-import.target
zfs-load-module.service
zfs-mount.service
zfs-share.service
zfs.target
zfs-volumes.target
zfs-volume-wait.service
zfs-zed.service

...were DISABLED despite vendor preset being ENABLED. Checking an other ubuntu system showed these should be enabled. I think it was working at first but then it started not importing my zpool at boot. I guess it was when I installed xfce4. Why would installing xfce4 disable ZFS?? I had to manually enable them all again...