MarsSeed [1] filed a deletion request for gnome-schedule [2]: Broken, abandoned. Discontinued since 2014. Make dependency gnome-doc-utils has been unbuildable between 2021 and 2024, and in the beginning of 2024, its build got fixed, but since that time, it crashes during runtime. I think this is not viable to keep this package, and it seems no one really wants to maintain it. There are working alternatives (calendar/task/schedule/PIM apps). [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/gnome-schedule/