lxqt-base/lxqt-policykit-0.10.0 depends on sys-auth/polkit-qt-0.112.0 steps to reproduce having installed previously lxqt-meta 1) try to update sys-auth/polkit-qt-0.112.0 to sys-auth/polkit-qt-0.112.0-r1 output: $ sudo emerge --oneshot --ask polkit-qt These are the packages that would be merged, in order: Calculating dependencies... done! [ebuild U ] sys-auth/polkit-qt-0.112.0-r1 [0.112.0] USE="(-qt5*)" !!! Multiple package instances within a single package slot have been pulled !!! into the dependency graph, resulting in a slot conflict: sys-auth/polkit-qt:0 (sys-auth/polkit-qt-0.112.0-r1:0/0::gentoo, ebuild scheduled for merge) pulled in by sys-auth/polkit-qt (Argument) (sys-auth/polkit-qt-0.112.0:0/0::gentoo, installed) pulled in by sys-auth/polkit-qt[qt5(-)] required by (lxqt-base/lxqt-policykit-0.10.0:0/0::gentoo, installed)
The message means you need sys-auth/polkit-qt to be built with the qt5 USE flag enabled. >[ebuild U ] sys-auth/polkit-qt-0.112.0-r1 [0.112.0] USE="(-qt5*)" indicates that the qt5 USE flag is masked for you. I assume you are on x86 (qt5 USE flag is currently stable-masked there)? echo "-qt5" >> /etc/portage/profile/use.stable.mask
