Broked my gentoo
grub-probe: error: cannot find a device for /boot (is /dev mounted?).
I've fixed grub issues before with chroot and the following from the handbook
root # mount --types proc /proc /mnt/gentoo/proc
root # mount --rbind /sys /mnt/gentoo/sys
root # mount --rbind /dev /mnt/gentoo/dev
root # mount --bind /run /mnt/gentoo/run
But they don't seem to be binding correctly this time around. What else can I do?