MarsSeed [1] filed a deletion request for gtksourceview3-git [2]: Defunct VCS package from 2015. It is also broken: tries (and fails) to build the current master branch which contains gtksourceview5. But I see no point in fixing this package: the gtksourceview3 code on the last relevant git branch, 'gnome-3.24' has not been touched since Jan 2020. [a] Therefore keeping a development package for it is moot. Arch extra repo carries a stable gtksourceview3, with patches on top of the last tagged release. [a]: https://gitlab.gnome.org/GNOME/gtksourceview/-/tree/gnome-3-24 [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/gtksourceview3-git/