bash-5.1# pkgadd -r /mnt/ -f -u filesystem#3.7-3.pkg.tar.xz
pkgadd: package filesystem not previously installed (skip -u to install)
bash-5.1# pkgadd -r /mnt/ -f filesystem#3.7-3.pkg.tar.xz
pkgadd: could not install var/run: Could not unlink
pkgadd: could not remove /mnt/var/tmp/: Directory not empty
pkgadd: could not remove /mnt/var/spool/mail/: Directory not empty
pkgadd: could not remove /mnt/var/run: Directory not empty
pkgadd: could not remove /mnt/var/log/old/: Directory not empty
pkgadd: could not remove /mnt/usr/src/: Directory not empty
pkgadd: could not remove /mnt/tmp/: Directory not empty
pkgadd: could not remove /mnt/root/: Directory not empty
pkgadd: could not remove /mnt/opt/: Directory not empty
pkgadd: could not remove /mnt/home/: Directory not empty
pkgadd: failed
bash-5.1#