nvidia-glx under Debian 4.0r1

[Bart <debian@aeronautics.nl>]

I've installed Debian 4.0r1 and now I want 3D support for my Nvidia 
graphics card.

I'm following instructions as can be found on 
http://wiki.debian.org/NvidiaGraphicsDrivers

I can install the nvidia-kernel-sources, but not the nvidia-glx package. 
The error given is:

The following packages have unmet dependencies:
  nvidia-glx: Depends: libc6 (>= 2.5-5) but 2.3.6.ds1-13etch2 is to be 
installed

Is there a way to solve this?

I'm new to Debian, so don't shoot me ;)