MarsSeed [1] filed a deletion request for lib32-gstreamer0.10-base [2]: Abandoned, not actually used gstreamer0.10 lib32 library pkg from 2020. It is unbuildable, just like its also several-years-unmaintained native-build counterpart (gstreamer0.10-base). AUR/crossover currently defines this as an optdepend, but its current version can no longer use this. I plan to submit a comment on the latter's AUR page with a suggested PKGBUILD diff, because the current package has many other obsolete (opt)depends as of now, due to upstream changes. Safe to delete this defunct library. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/lib32-gstreamer0.10-base/