It seems that that exact error message can only happen if exec.LookPath("zfs") fails, so I’m not sure I see how it could possibly be a failure in kernel support. And no, I’ve installed zfs-dkms, and my kernel has native ZFS support as a result:
$ lsmod | grep zfs
zfs 2707456 0
zunicode 331776 1 zfs
zavl 16384 1 zfs
zcommon 53248 1 zfs
znvpair 90112 2 zcommon,zfs
spl 98304 3 znvpair,zcommon,zfs
$ grep zfs /proc/filesystems
nodev zfs