@unexec if cmp -s %D/etc/bird6.conf.example %D/etc/bird6.conf; then rm -f %D/etc/bird6.conf; fi
etc/bird6.conf.example
@exec if [ ! -f %D/etc/bird6.conf ] ; then cp -p %D/%F %B/bird6.conf; fi
sbin/bird6
sbin/birdc6
sbin/birdcl6