MarsSeed [1] filed a deletion request for mingw-w64-gtksourceview4 [2]: EOL, unused, deprecated library pkg from 2020. AUR dependency chain (mingw-w64-gtk3 et al.) is abandoned and unmaintained for 1-3+ years.
[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/mingw-w64-gtksourceview4/
