[arch-general] Quick btrfs-root question

I apologize if I've missed it somewhere, but does grub support booting from a multi-device btrfs root sub-volume without a separate /boot? According to the wiki I think it's supposed to work, but when I chroot to that root, and run grub-install, it returns: Path `/boot/grub' is not readable by GRUB on boot. Installation is impossible. Aborting. I left the chroot, and installed grub to that disk from my old root, but it won't boot from my new volume. Does anyone have some advice, or should I just move to a separate /boot? Thanks, =-Jameson