diff --git a/pkgs/applications/misc/xxkb/default.nix b/pkgs/applications/misc/xxkb/default.nix
index 6d96278356df..c4e7fb23b899 100644
--- a/pkgs/applications/misc/xxkb/default.nix
+++ b/pkgs/applications/misc/xxkb/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     imake
     libX11 libXt libXext libXpm
-  ] ++ stdenv.lib.optional svgSupport [ librsvg glib gdk_pixbuf pkgconfig ];
+  ] ++ stdenv.lib.optionals svgSupport [ librsvg glib gdk_pixbuf pkgconfig ];
 
   outputs = [ "out" "man" ];