MarsSeed [1] filed a deletion request for libnotify-gtk2 [2]: Not useful to keep this old version from 2013. This was intended for Gtk2-based desktop environments, but such are no longer available in Arch or AUR repos. Gtk2 GUI applications work just fine with the latest version of [extra] repo's Gtk3-based libnotify. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/libnotify-gtk2/