makepkg in build-omarchy-packages.sh installs runtime build deps via pacman, which uses the container's /etc/pacman.conf. That config only had core/extra/multilib by default, so deps that live in the omarchy repo (limine-snapper-sync, limine-mkinitcpio-hook) failed to resolve. Append the [omarchy] block from the channel-specific online config to /etc/pacman.conf right after omarchy-keyring is installed.