MarsSeed [1] filed a deletion request for gnome-manual-duplex [2]: Broken Python2/Gtk2 pkg from 2021. Upstream discontinued since 2020. Package declares Python2 bindings (gobject) for Gtk3 but it needs the Gtk2 variant. I recommend deletion. There are alternatives for this use case (manual duplex / two-sided printing), e.g.: - AUR/tea4cups-py3-git [a] - GitHub/dentys03/manual_duplex_linux (simple Bash script) [b] [a]: https://aur.archlinux.org/packages/tea4cups-py3-git [b]: https://github.com/dentys03/manual_duplex_linux [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/gnome-manual-duplex/