discord: use non-binary wrapper for wrapGAppsHook

The use of --add-flags in this derivation does not work with binary
    wrappers, which wrapGAppsHook uses since #164163.

pkgs/applications/networking/instant-messengers/discord/linux.nix

@@ -1,5 +1,5 @@
 { pname, version, src, meta, binaryName, desktopName, autoPatchelfHook
-, makeDesktopItem, lib, stdenv, wrapGAppsHook, alsa-lib, at-spi2-atk
+, makeDesktopItem, lib, stdenv, wrapGAppsHook, makeWrapper, alsa-lib, at-spi2-atk
 , at-spi2-core, atk, cairo, cups, dbus, expat, fontconfig, freetype, gdk-pixbuf
 , glib, gtk3, libcxx, libdrm, libnotify, libpulseaudio, libuuid, libX11
 , libXScrnSaver, libXcomposite, libXcursor, libXdamage, libXext, libXfixes
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
     libxshmfence
     mesa
     nss
-    wrapGAppsHook
+    (wrapGAppsHook.override { makeBinaryWrapper = makeWrapper; })
   ];
 
   dontWrapGApps = true;