If consolekit use flag is not enable (and consolekit is running) plasma-nm does not work.
Can be used with systemd too and other login manager work also. So requiring a specific login manager is not valid.
Then it should depend on consolekit directly or a note should be displayed about the need of consolekit.
Thanks for reporting. This is fixed in cvs now. Please sync in some hours to get the changes. + + 10 Aug 2014; Johannes Huber <johu@gentoo.org> + -files/libnm-qt-0.9.8.1-cxxflags.patch, -libnm-qt-0.9.8.1-r1.ebuild, + libnm-qt-0.9.8.2-r1.ebuild: + DEPEND on net-misc/networkmanager[{consolekit,systemd}], bug #492434. Remove + old. +