diff --git a/pkgs/servers/x11/xorg/xwayland.nix b/pkgs/servers/x11/xorg/xwayland.nix
index f43a9c67160..729fcc2e344 100644
--- a/pkgs/servers/x11/xorg/xwayland.nix
+++ b/pkgs/servers/x11/xorg/xwayland.nix
@@ -20,7 +20,7 @@ overrideDerivation xorgserver (oldAttrs: {
     "--with-default-font-path="
     "--with-xkb-bin-directory=${xkbcomp}/bin"
     "--with-xkb-path=${xkeyboard_config}/etc/X11/xkb"
-    "--with-xkb-output=$out/share/X11/xkb/compiled"
+    "--with-xkb-output=$(out)/share/X11/xkb/compiled"
   ];
 
   postInstall = ''