Use the mounted image /zroot/poudriere/jails/12arm7. Create the jail :
shell> poudriere jail -c -m null -j 12arm7 -v 12.2-RELEASE -a armv7 -M /zroot/poudriere/jails/12arm7,or update it if it already exists :
shell> poudriere jail -u -m null -j 12arm7 -v 12.2-RELEASE -a armv7 -M /zroot/poudriere/jails/12arm7[root@build /usr/home/admin]# poudriere jail -c -m null -j 12arm7 -v 12.2-RELEASE -a armv7 -M /zroot/poudriere/jails/12arm7
[00:00:00] Cross-building ports for armv7 on amd64 requires QEMU
[00:00:00] Recording filesystem state for clean... done
[00:00:00] Jail 12arm7 12.2-RELEASE armv7 is ready to be used