Nixgl: https://github.com/nix-community/nixGL
Also, it seems like this requires the latest “stateversion”, since this is a new feature.
This is pretty big, because it makes it easy to use applications that use the GPU from nixpkgs on non Nixos systems.
Thanks for the heads up!
The new hostwide flag is very convenient. It probably won’t work for me because I’m sticking to stock SteamOS for now, and it’s very immutable. But I’m giving it a try asap!