xiota [1] filed a deletion request for kwin-effect-shapecorners-git [2]: Does not build because of upstream issue. Upstream has not been updated in over 2 years, and has since been forked: https://github.com/matinlotfali/KDE-Rounded-Corners [1] https://aur.archlinux.org/account/xiota/ [2] https://aur.archlinux.org/pkgbase/kwin-effect-shapecorners-git/