obs-studio: avoid double-wrapping the obs binary

Suggested in https://github.com/NixOS/nixpkgs/pull/145664#issuecomment-968107267.

pkgs/applications/video/obs-studio/default.nix

@@ -21,7 +21,6 @@
 , curl
 , wayland
 , xorg
-, makeWrapper
 , pkg-config
 , libvlc
 , mbedtls
@@ -67,7 +66,6 @@ mkDerivation rec {
     addOpenGLRunpath
     cmake
     pkg-config
-    makeWrapper
     wrapGAppsHook
   ]
   ++ optional scriptingSupport swig;
@@ -121,9 +119,13 @@ mkDerivation rec {
     "-DCEF_ROOT_DIR=../../cef"
   ];
 
-  qtWrapperArgs = [
-    "--prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath [ xorg.libX11 libvlc ]}"
-  ];
+  dontWrapGApps = true;
+  preFixup = ''
+    qtWrapperArgs+=(
+      --prefix LD_LIBRARY_PATH : "${lib.makeLibraryPath [ xorg.libX11 libvlc ]}"
+      ''${gappsWrapperArgs[@]}
+    )
+  '';
 
   postFixup = lib.optionalString stdenv.isLinux ''
     addOpenGLRunpath $out/lib/lib*.so