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in /usr/lib/libGL.so.1 (which will typically load a driver in /usr/X11R6/lib/modules/dri). This has been tested on a i915 graphics card; it should work with most open source X.org drivers. For NVidia's proprietary drivers (which we cannot build ourselves anyway), some more symlinks are necessary; I'll add those later. So to get hardware-accelerated Quake 3, do: $ nix-env -p /nix/var/nix/profiles/opengl -i xorg-sys-opengl $ nix-env -i quake3-demo $ quake3 svn path=/nixpkgs/trunk/; revision=4613