my steam package overrides for Bumblebee/NVIDIA Optimus

steam-overrides-snippet.nix

  # some Steam/Optimus quirks
  nixpkgs.config.packageOverrides = superPkgs: {
    steam = superPkgs.steam.override {
      withPrimus = true;
      extraPkgs = p: with p; [
        glxinfo        # for diagnostics
        nettools       # for `hostname`, which some scripts expect
        bumblebee      # for optirun
        virtualgl      # for glxspheres
      ];
    };
  };