conky's nvidia support pulls in nvidia-settings. However, it requires nvidia-drivers-2*, which blocks the new nvidia-drivers. I suspect this is just outdated code in nvidia-settings, and it should really be requiring >nvidia-drivers-200 or something like that.
to confirm !!! Multiple package instances within a single package slot have been pulled !!! into the dependency graph, resulting in a slot conflict: x11-drivers/nvidia-drivers:0 (x11-drivers/nvidia-drivers-295.59::gentoo, installed) pulled in by =x11-drivers/nvidia-drivers-2* required by (media-video/nvidia-settings-295.40::gentoo, installed) (x11-drivers/nvidia-drivers-302.17::gentoo, ebuild scheduled for merge) pulled in by (no parents that aren't satisfied by other packages in this slot)
nvidia-settings-302.11 has just been added.