Comment 3 for bug 1887258

ZFS is now built-in as part of the rapi kernel package:

ubuntu@ubuntu:~$ uname -a
Linux ubuntu 5.4.0-1015-raspi #15-Ubuntu SMP Fri Jul 10 05:34:24 UTC 2020 aarch64 aarch64 aarch64 GNU/Linux
ubuntu@ubuntu:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.1 LTS
Release: 20.04
Codename: focal
ubuntu@ubuntu:~$ lsmod | grep zfs
zfs 4005888 6
zunicode 331776 1 zfs
zavl 16384 1 zfs
icp 290816 1 zfs
zlua 200704 1 zfs
zcommon 106496 1 zfs
znvpair 110592 2 zfs,zcommon
spl 180224 5 zfs,icp,znvpair,zcommon,zavl