sickcodes [1] filed an orphan request for xar [2]: Maintainer is MIA, same with https://aur.archlinux.org/packages/xar- tpoechtrage-git/
This build works https://github.com/tpoechtrager/xar git clone https://github.com/tpoechtrager/xar.git cd xar/xar ./autogen.sh make ./src/xar [1] https://aur.archlinux.org/account/sickcodes/ [2] https://aur.archlinux.org/pkgbase/xar/
