alyst [1] filed a deletion request for gnome-shell-extension-shell- volume-mixer-git [2]:
Please delete this package. As GelatinousSlime points out, it's a duplicate of gnome-shell-extension-volume-mixer-git, which is actively maintained.
[1] https://aur.archlinux.org/account/alyst/ [2] https://aur.archlinux.org/pkgbase/gnome-shell-extension-shell-volume-mixer-g...