Jail trouble on 11.0-STABLE

I updated my host to the FreeNAS-11-STABLE train (maybe not a good idea?). Now when I create a jail and attempt to build from the portsnap tree, I get complaints like "Ports Collection support for your FreeBSD version has ended, and no ports are guaranteed to build on this system. Please upgrade to a supported release."

When I do a "freebsd-version" inside the jail, it reports "11.0-RELEASE-p1"

When I do it within the host, it reports "11.0-STABLE"

I don't know what to do. Any advice...

Jail trouble on 11.0-STABLE