MarsSeed [1] filed a deletion request for kproxyswitch [2]: Unneeded addon script to KDE4 from 2015. There's no KDE4 environment available for installation in Arch/AUR repos. The script has also been deleted from kde-apps.org (upstream URL). [a] [a]: http://kde-apps.org/content/show.php?content=34605 [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/kproxyswitch/