Configure poudriere

Edit poudriere.conf

># vim /usr/local/etc/poudriere.conf
...
ZPOOL=zpoud
...
BASEFS=/usr/local/poudriere
...

Create dataset and directories.
And create a zfs pool if needed.

># zpool create zpoud /dev/ada1
># zfs create -o mountpoint=/usr/local/poudriere zpoud/usr_local_poudriere
># zfs create -o mountpoint=/usr/local/poudriere zroot/usr_local_poudriere
># mkdir /usr/local/poudriere
># mkdir /usr/ports/distfiles

Create the poudriere jail

># poudriere jail -c -j 12amd64 -v 12.0-RELEASE

Create the ports tree

># poudriere ports -c -p sjapkg