I'm installing Obarun from my Arch box. The instructions on https://wiki.obarun.org/doku.php?id=from-arch-install tell me to install pacman to the target using this command

pacman -Sy pacman -r /mnt

This results in failure:
error: target not found: -r
error: target not found: /mnt
I can't figure out what the correct syntax is supposed to be -- it seems to be interpreting -r /mnt as arguments for pacman.