Cannot run anbox on Pinebook Pro

My pinebook pro is fully updated.
I installed the following two packages

then I rebooted

when I run anbox from command line I get this error

anbox: symbol lookup error: /usr/lib/ undefined symbol: seccomp_notify_fd

Something has changed. Either liblxc or whatever is trying to use it. Looks like one or the other or both needs to be re-compiled or some code changed some where.

I tried again.
Anbox now runs.
If I run anbox check-features I get
“You’re running Anbox on a not yet supported architecture”

Actually I just got it working by following the instructions here