yochananmarqos [1] filed an orphan request for gnome-shell-extension- rounded-window-corners-reborn-git [2]:
Maintainer is not maintaining. Upstream has renamed the gschema and this package has been failing to build for a month. [1] https://aur.archlinux.org/account/yochananmarqos/ [2] https://aur.archlinux.org/pkgbase/gnome-shell-extension-rounded-window-corners-reborn-git/
