Something

localhost linux # eix nvidia-drivers
[U] x11-drivers/nvidia-drivers
     Available versions:  1.0.7185 (~)1.0.9626-r99[1] (~)1.0.9629-r90[1] (~)1.0.9631-r90[1] (~)1.0.9631-r91[1] (~)1.0.9631-r92[1] 1.0.9639 (~)1.0.9639-r90[1] (~)1.0.9742-r90[1] (~)1.0.9746-r90[1] (~)1.0.9755-r10[1] (~)71.86.01 (~)71.86.01-r10[1] (~)96.43.01 (~)96.43.01-r10[1] 100.14.09 (~)100.14.09-r10[1] (~)100.14.11 (~)100.14.11-r10[1] (~)100.14.11-r11[1] (~)100.14.19 (~)100.14.19-r11[1] (~)100.14.23-r10[1] {acpi distribution gtk kernel_linux multilib}
     Installed versions:  100.14.11-r11[1](11:23:09 PM 10/28/2007)(distribution kernel_linux -gtk -multilib)
     Homepage:            http://www.nvidia.com/
     Description:         NVIDIA X11 driver and GLX libraries

[1] "sabayon" /usr/portage/local/layman/sabayon
localhost linux # emerge -va nvidia-drivers && ln -s /usr/lib/opengl/ati/lib/libGL.so.1 /usr/lib/libGL.so.1

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild     U ] x11-drivers/nvidia-drivers-100.14.23-r10 [100.14.11-r11] USE="acpi%* distribution -gtk (-multilib)" 11,303 kB [1]

Total: 1 package (1 upgrade), Size of downloads: 11,303 kB
Portage tree and overlays:
 [0] /usr/portage
 [1] /usr/portage/local/layman/sabayon

Would you like to merge these packages? [Yes/No]