Hi, I figured out what was needed. Using the old jessie rescue image, if trying to install zfs via the instructions here: https://github.com/zfsonlinux/zfs/wiki/Debianinstallation Boot older jessie. Install zfs packages: apt-get install zfs-dkms zfsutils-linux Problem: The following packages have unmet dependencies:  zfs-dkms : PreDepends: spl-dkms (>= 0.6.5.9) but it is not going to be installed Solution: …