$ sudo emerge -av nvidia-drivers
These are the packages that would be merged, in order:
Calculating dependencies... done!
[blocks B ] media-video/nvidia-glx (is blocking x11-drivers/nvidia-drivers-1.0.8762-r1)
[blocks B ] media-video/nvidia-kernel (is blocking x11-drivers/nvidia-drivers-1.0.8762-r1)
[ebuild N ] x11-drivers/nvidia-drivers-1.0.8762-r1 USE="dlloader" 9,733 kB
Total size of downloads: 9,733 kB
!!! Error: The above package list contains packages which cannot be installed
!!! at the same time on the same system.