MarsSeed [1] filed a deletion request for uboot-nanopi-r4s [2]: aarch64 only, not compatible with Arch Linux. Belongs to the ArchLinuxARM.org repos.
[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/uboot-nanopi-r4s/
