/usr/sbin/update-guestfs-appliance is in libguestfs0 1:1.14.8-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7
#!/bin/sh set -e cd /usr/lib/guestfs umask 022 ./make.sh