adoodle ~ # emerge nvidia-legacy-drivers
These are the packages that would be merged, in order:
Calculating dependencies... done!
[blocks B ] x11-drivers/nvidia-legacy-drivers (is blocking x11-drivers/nvidia-drivers-1.0.9746)
[blocks B ] x11-drivers/nvidia-drivers (is blocking x11-drivers/nvidia-legacy-drivers-1.0.7184)
[ebuild N ] x11-drivers/nvidia-legacy-drivers-1.0.7184 USE="dlloader" 5,450 kB
[ebuild N ] x11-drivers/nvidia-drivers-1.0.9746 USE="dlloader" 0 kB
Total: 2 packages (2 new, 2 blocks), Size of downloads: 5,450 kB
!!! Error: The above package list contains packages which cannot be installed
!!! at the same time on the same system.
For more information about Blocked Packages, please refer to the following
section of the Gentoo Linux x86 Handbook (architecture is irrelevant):
http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?full=1#blocked