password for root is already locked

Running pmbootstrap install the first time is fine, however running pmbootstrap install a second time yields the following error:

==> Installing: /boot/boot.img
mkinitfs completed in: 5.512159091s
*** SET LOGIN PASSWORD FOR: 'user' ***
(rootfs_samsung-expressatt) % passwd user
Changing password for user
New password: 
Bad password: too short
Retype password: 
passwd: password for user changed by root
(rootfs_samsung-expressatt) % passwd -l root
passwd: password for root is already locked
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Usually a yes | pmbootstrap zap -hc -d -p -m -o -r solves this, but I would like to not wait for it to finish