Menelkir [1] filed an orphan request for libretro-melonds-git [2]: I'm not sure if the developer is MIA, but I've fixed the issues and posted in the comments.
[1] https://aur.archlinux.org/account/Menelkir/ [2] https://aur.archlinux.org/pkgbase/libretro-melonds-git/
