Update desktop base config to use regreet+gvfs.

services/desktop.nix

@@ -16,9 +16,16 @@ in
     imports = desktopFiles;
   }
   // mkIf (elem "desktop" cfg.services) {
-    services.gvfs.enable = true;
-    services.xserver = {
-      xkb.layout = "de";
+    xdg.portal = {
+      enable = true;
+      wlr.enable = true;
+      extraPortals = with pkgs; [
+        xdg-desktop-portal-gtk
+        xdg-desktop-portal-gnome
+      ];
+    };
+    services = {
+      gvfs.enable = true;
       libinput = {
         enable = true;
         touchpad = {
@@ -29,6 +36,35 @@ in
         };
       };
     };
+    programs = {
+      dconf.enable = true;
+      regreet = {
+        enable = true;
+        settings = {
+          GTK = {
+            application_prefer_dark_theme = true;
+            theme_name = lib.mkForce "Kanagawa-BL";
+          };
+        };
+      };
+    };
+
+    environment = {
+      systemPackages = with pkgs; [kanagawa];
+      etc."xdg/gtk-2.0/gtkrc".text = ''
+        gtk-key-theme-name = "Kanagawa-BL"
+      '';
+      etc."xdg/gtk-3.0/settings.ini".text = ''
+        [Settings]
+        gtk-key-theme-name = Kanagawa-BL
+      '';
+      # Set keyboard layout for regreet cage
+      # see man cage or:
+      # https://man.archlinux.org/man/cage.1.en#ENVIRONMENT
+      variables.XKB_DEFAULT_LAYOUT = "de";
+    };
+
+    # Allow users in the video group to change the display brightness
     services.udev.extraRules = ''
       ACTION=="add", SUBSYSTEM=="backlight", RUN+="${pkgs.coreutils}/bin/chgrp video /sys/class/backlight/%k/brightness"
       ACTION=="add", SUBSYSTEM=="backlight", RUN+="${pkgs.coreutils}/bin/chmod 664 /sys/class/backlight/%k/brightness"