clightd: depend on wayland-scanner

Otherwise, wayland-scanner would be picked up from the wayland in
buildInputs, which isn't cross-friendly and will stop working when we
split wayland-scanner into a separate package.

pkgs/applications/misc/clight/clightd.nix

@@ -1,5 +1,5 @@
 { lib, stdenv, fetchFromGitHub
-, dbus, cmake, pkg-config
+, dbus, cmake, pkg-config, wayland-scanner
 , glib, udev, polkit, libusb1, libjpeg, libmodule
 , pcre, libXdmcp, util-linux, libpthreadstubs
 , enableDdc ? true, ddcutil
@@ -40,10 +40,15 @@ stdenv.mkDerivation rec {
       ++ optional enableScreen     "-DENABLE_SCREEN=1"
       ++ optional enableYoctolight "-DENABLE_YOCTOLIGHT=1";
 
+  depsBuildBuild = [
+    pkg-config
+  ];
+
   nativeBuildInputs = [
     dbus
     cmake
     pkg-config
+    wayland-scanner
   ];
 
   buildInputs = with lib; [