Crashplan jail access to jail directory?

I'd like my Crashplan plugin jail to be able to backup the jails directory that's on my FreeNAS host. However, it doesn't appear that a jail can see the jails directory on mounted storage. I imagine this is probably for security purposes.

I'm thinking of running some kind of rsync backup from the jails to the host storage somewhere as a workaround. Before I do that I thought I'd ask if anyone knows if the default behavior can be changed?