sbuild-adduser adds the specified users to the sbuild group,
granting them the privelege to build packages with
sbuild(1).
The
schroot(1)
configuration must permit the user to obtain root permissions in the chroot via
the root-users and root-groups options in
schroot.conf, because this is required to install and remove
build-dependencies inside the chroot. This is normally done using the
sbuild group, but additional users or groups may be added in order to
grant finer-grained permissions, for example to restrict individual users to
particular chroots.