The libfprint-2-2 postinst script calls udevadmin trigger for all the supported USB readers. The list of readers used in that file is generated using the gbp import hook when `gbp import-orig` (via --uscan or with a tarball) is used. Alternatively it can be called manually by using: GBP_SOURCES_DIR=. debian/update-udev-triggers.sh When preparing a new upstream release, this script should be called against the upstream provided .hwdb file.