Setting up pkgsrc over NFS

[Roy Marples <roy%marples.name@localhost>]

I have this in /etc/exports:
/usr/src        -network 10.73.0.0 -mask 255.255.0.0    -maproot=nobody
/usr/xsrc       -network 10.73.0.0 -mask 255.255.0.0    -maproot=nobody
/usr/pkgsrc     -network 10.73.0.0 -mask 255.255.0.0    -maproot=nobody
/usr/obj.aarch64        -network 10.73.0.0 -mask 255.255.0.0 
-maproot=nobody
/usr/obj.pkgsrc.aarch64 -network 10.73.0.0 -mask 255.255.0.0 
-maproot=nobody
/var/bulk.aarch64       -network 10.73.0.0 -mask 255.255.0.0 
-maproot=root

The last directory requires root writeable as it will be used for a chroot.
However, it doesn't show up in showmount -e on the host and trying to 
mount it on the client prints:
mount_nfs: can't access /var/bulk.aarch64: Permission denied.

What did I do wrong here, or does root mapping just not work?

Roy