MarsSeed [1] filed a deletion request for retrosmart-qtcurve-theme [2]: This Qt4/Gtk2/Qt5 theme is EOL since 6 years ago. [a] It is for KDE's QtCurve theming engine, which is EOL since 5 years ago and is broken, unbuildable on current Arch Linux. I think it's not useful to keep this package any longer. [a]: https://github.com/mdomlop/retrosmart-qtcurve-theme [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/retrosmart-qtcurve-theme/