Note: help and version output are generated by a naïve script which tries a few variants of
<command> --help, <command> -h etc. to find the command's help and version info.
Sometimes it gets lucky, sometimes it doesn't; if the output below looks wrong, it probably is.
gnome-boxes --version (return code: 0)
gnome-boxes -HELP (return code: 1)
Unable to init server: Could not connect: Connection refused
(gnome-boxes:23519): Gtk-WARNING **: cannot open display: