MarsSeed [1] filed a deletion request for gmpc-git [2]: Abandoned VCS package from 2016.
Broken for at least 15 months but no one noticed. Last comment is from 2021. Upstream development stopped in 2020. [a] [a]: https://github.com/DaveDavenport/gmpc [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/gmpc-git/
