Revert multilib for actual install

builder/offline.sh

@@ -155,6 +155,7 @@ printf '%s\n' "${arch_packages[@]}" >>"$cache_dir/packages.x86_64"
 
 # We have to do this, because `mkarchiso` copies in the pacman.conf
 # in use during the build process - so it needs to be made offline.
+(cd $cache_dir/ && git apply --reverse /builder/patches/offline/enable-multilib.patch)
 (cd "$cache_dir" && git apply /builder/patches/offline/offline-mirror.patch)
 cp $cache_dir/pacman.conf "$cache_dir/airootfs/etc/pacman.conf"