MarsSeed [1] filed a deletion request for lightlyshaders [2]: Build is broken. Also this version (v2.x) would not work on current KDE Plasma 6. For upstream's v3.0 port for Plasma 6, the proper package name would be 'kwin6-effects-lightlyshaders', in accordance with the naming patterns used in ArchWiki's KDE package guidelines. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/lightlyshaders/