config repo95-dconf-update.preset and 95-fprintd.presetls /usr/lib/systemd/system-preset you'll probably see what i mean90-default.presethas a lot of stuff in it99-default-disable.preset is the last one to run, and it disables anything which wasn't already enabled by presetfprintd.service file added is an override of the pre-installed servicefprintd.service the better way to override a service is with an overrideconfig95-dconf-update.preset95-fprintd.presetls /usr/lib/systemd/system-preset90-default.preset99-default-disable.presetfprintd.servicefprintd.service