
It seems that it is a GPL violation to distribute zfs in the installation ISOs. https://sfconservancy.org/blog/2016/feb/25/zfs-and-linux/ If anyone knows the issue better and has a reason to reenable it legally, feel free to reenable it. I don't know much about it.
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at http://nixos.org/nixos and in the manual in doc/manual.