ticpu [1] filed an orphan request for overlayfs-tools-git [2]: I'd like to update the PKGBUILD with the new build system. This doesn't build at the moment and no answer for more than a year from the maintainer.
[1] https://aur.archlinux.org/account/ticpu/ [2] https://aur.archlinux.org/pkgbase/overlayfs-tools-git/