=== Day 5 ===
OK, standard install worked with UEFI. I accidentally made <code>/boot</code> partition <code>ext2</code> instead of <code>vfat</code>, fortunately it was quite easy to fix afterwards. I think it's one of the mistakes I made in the previous installs. So
I' ll try again taking especially care about UEFI things.
I made a 500MB EFI partition and all space left for ZFS: