Intel Graphics

Iris

On nixos-unstable the new Gallium iris driver is enabled by default. For nixos-20.03 you can use the following in your system configuration:

  config = {
    environment.variables = {
      MESA_LOADER_DRIVER_OVERRIDE = "iris";
    };
    hardware.opengl.package = (pkgs.mesa.override {
      galliumDrivers = [ "nouveau" "virgl" "swrast" "iris" ];
    }).drivers;
  };

Note that you might want additional entries in extraPackages, for example, to enable "accelerated video playback".

(See this GitHub thread for context and explanation. nouveau is included to trigger the gallium-xa build, which is currently required because the nix derivation expects to copy the gallium-xa pkg-config files into place. Without swrast and/or virgl, it complains about needing softpipe/llvmpipe to build the nine state tracker.)