debian -fstype=nfs,ro,tcp 172.29.122.2:/srv/mirrors/debian
debian-backports -fstype=nfs,ro,tcp 172.29.122.2:/srv/mirrors/debian-backports
+debian-debug -fstype=nfs,ro,tcp 172.29.122.2:/srv/mirrors/debian-debug
debian-security -fstype=nfs,ro,tcp 172.29.122.2:/srv/mirrors/debian-security