make dbus/qtdbus optional

Hello, I'm using mkvtoolnix on Gentoo without dbus/qtdbus. Everything works just fine. (gui + cli) I only needed to use this quick patch :

$ cat /etc/portage/patches/media-video/mkvtoolnix/configure.patch
--- 1/configure   2019-03-07 12:52:33.594252613 -0600
+++ 2/configure   2019-03-07 12:57:28.576229245 -0600
@@ -9287,7 +9287,7 @@
   with_qt_pkg_config_modules="$with_qt_pkg_config_modules,Qt5DBus"
 fi
 
-$as_echo "#define HAVE_QTDBUS 1" >>confdefs.h
+$as_echo "#undef HAVE_QTDBUS" >>confdefs.h
 
     fi

So I'm wondering if dbus/qtdbus could be made optional ? In a more official way and to get rid of the need of that configure.patch, so that's why I ask here.

Thanks.