Urpkg is far from perfect. Here is a list of bugs that are known and should be fixed in a subsequent release. If you want to help, see Chapter 5, Contributing to urpkg
Urpkg does not support users or groups of more than 127 characters. If you
have any user or group with 128 characters or more on your system,
consider changing their name or changing
UGRP_RE_MAX_LENGTH in
src/ugrp.h to fit your maximum size.