xkbDir patch

xkbDir.patch

diff --git a/nixos/modules/services/x11/xserver.nix b/nixos/modules/services/x11/xserver.nix
index 3348e8d..1d91cb0 100644
--- a/nixos/modules/services/x11/xserver.nix
+++ b/nixos/modules/services/x11/xserver.nix
@@ -280,6 +280,14 @@ in
         '';
       };
 
+      xkbDir = mkOption {
+        type = types.path;
+        default = "${pkgs.xkeyboard_config}/etc/X11/xkb";
+        description = ''
+          X keyboard directory.
+        ''
+      }
+
       config = mkOption {
         type = types.lines;
         description = ''
@@ -452,7 +460,7 @@ in
             target = "X11/xorg.conf";
           }
           # -xkbdir command line option does not seems to be passed to xkbcomp.
-          { source = "${pkgs.xkeyboard_config}/etc/X11/xkb";
+          { source = "${cfg.xkbDir}";
             target = "X11/xkb";
           }
         ]);
@@ -520,7 +528,7 @@ in
         "-logfile" "/var/log/X.${toString cfg.display}.log"
         "-config ${configFile}"
         ":${toString cfg.display}" "vt${toString cfg.tty}"
-        "-xkbdir" "${pkgs.xkeyboard_config}/etc/X11/xkb"
+        "-xkbdir" "${cfg.xkbDir}"
       ] ++ optional (!cfg.enableTCP) "-nolisten tcp";
 
     services.xserver.modules =