openxr-loader: enable wayland

Not sure this is required as it seems to work without but do it anyways for good
measure

pkgs/development/libraries/openxr-loader/default.nix

@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, python3, libX11, libXxf86vm, libXrandr, vulkan-headers, libGL, vulkan-loader }:
+{ lib, stdenv, fetchFromGitHub, cmake, python3, libX11, libXxf86vm, libXrandr, vulkan-headers, libGL, vulkan-loader, wayland, pkg-config }:
 
 stdenv.mkDerivation rec {
   pname = "openxr-loader";
@@ -11,8 +11,8 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-YaK7scnfXkxhRe/PKZukqHD9X70X0/QUDL0znTPbIBE=";
   };
 
-  nativeBuildInputs = [ cmake python3 ];
-  buildInputs = [ libX11 libXxf86vm libXrandr vulkan-headers libGL vulkan-loader ];
+  nativeBuildInputs = [ cmake python3 pkg-config ];
+  buildInputs = [ libX11 libXxf86vm libXrandr vulkan-headers libGL vulkan-loader wayland ];
 
   cmakeFlags = [ "-DBUILD_TESTS=ON" ];