feat(work-pc): setup Wayland with NVIDIA's GBM backend

desktop/gnome.nix

@@ -13,7 +13,7 @@
   services.xserver.displayManager.gdm.enable = true;
   services.xserver.displayManager.gdm.wayland = true;
   services.xserver.displayManager.gdm.nvidiaWayland = true;
-  services.xserver.displayManager.defaultSession = "gnome-xorg";
+  # services.xserver.displayManager.defaultSession = "gnome-xorg";
   services.xserver.desktopManager.gnome.enable = true;
   services.xserver.desktopManager.gnome.extraGSettingsOverrides = ''
     [org/gnome/desktop/input-sources]

flake.nix

@@ -49,6 +49,31 @@
     , nvim-ts-context-commentstring }@inputs:
     let
       overlays = {
+        # newer packages that support NVIDIA's GBM Wayland backend
+        wayland = self: super: {
+          egl-wayland = super.egl-wayland.overrideAttrs (old: rec {
+            pname = "egl-wayland";
+            version = "1.1.9-master";
+            name = "${pname}-${version}";
+            src = self.fetchFromGitHub {
+              owner = "Nvidia";
+              repo = "egl-wayland";
+              rev = "daab8546eca8428543a4d958a2c53fc747f70672";
+              sha256 = "IrLeqBW74mzo2OOd5GzUPDcqaxrsoJABwYyuKTGtPsw=";
+            };
+            buildInputs = old.buildInputs ++ [ self.wayland-protocols ];
+          });
+          xwayland = super.xwayland.overrideAttrs (old: rec {
+            version = "21.1.3";
+            src = self.fetchFromGitLab {
+              domain = "gitlab.freedesktop.org";
+              owner = "xorg";
+              repo = "xserver";
+              rev = "xwayland-21.1.3";
+              sha256 = "VnFzKyxg/6gVBg+bHTwDbUwCQHWt04gmiaAFLSwg7XA=";
+            };
+          });
+        };
         neovim = self: super:
           with super.pkgs.vimUtils; {
             neovim-nightly = neovim.packages.${self.system}.neovim;
@@ -87,6 +112,7 @@
         modules = [ nixosModules.flakeDefaults ];
         overlays = [
           nur.overlay
+          overlays.wayland
           overlays.neovim
           overlays.deconz
           overlays.pop-shell

hardware/gpu-nvidia.nix

@@ -15,4 +15,12 @@
     extraPackages = with pkgs; [ libvdpau-va-gl vaapiVdpau ];
     extraPackages32 = with pkgs.pkgsi686Linux; [ libvdpau-va-gl vaapiVdpau ];
   };
+
+  # NVIDIA GBM setup
+  environment.variables = {
+    GBM_BACKENDS_PATH = "/run/opengl-driver/lib/gbm";
+    GBM_BACKEND = "nvidia-drm";
+    __GLX_VENDOR_LIBRARY_NAME = "nvidia";
+    OCL_ICD_VENDORS = "/run/opengl-driver/etc/OpenCL/vendors";
+  };
 }

home/browsers/firefox.nix

@@ -69,7 +69,10 @@ in {
   programs.firefox = {
     enable = true;
     package = with pkgs;
-      wrapFirefox firefox-unwrapped { cfg.enableFXCastBridge = true; };
+      wrapFirefox firefox-unwrapped {
+        forceWayland = true;
+        cfg.enableFXCastBridge = true;
+      };
     profiles = {
       private = {
         id = 0;