MarsSeed [1] filed a deletion request for compton-blackcapcoder-git [2]: Development of this fork has stopped in 2019. [a] No need to keep this VCS package. There are other forks that are newer and maintained - e.g. picom (there's an AUR VCS package for that). [a]: https://github.com/BlackCapCoder/compton [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/compton-blackcapcoder-git/