Cannot open directory from tasks.cfg

I've just installed xymon on NetBSD from pkgsrc.

2011-10-14 16:11:20 xymonlaunch starting
2011-10-14 16:11:20 Loading tasklist configuration from
/usr/pkg/etc/xymon/tasks.cfg
2011-10-14 16:11:20 Cannot open directory

I assume the error is because tasks.cfg contains this:
# Include add-on modules.
directory /usr/pkg/share/xymon/xymonhome/etc/tasks.d

Which doesn't exist.

Is there documentation on using / setting up tasks.d?

-Tracy