xvfb-run: unrecognized option '--version'

Usage: xvfb-run [OPTION ...] COMMAND Run COMMAND (usually an X client) in a virtual X server environment. Options: -a --auto-servernum try to get a free server number, starting at --server-num -e FILE --error-file=FILE file used to store xauth errors and Xvfb output (default: /dev/null) -f FILE --auth-file=FILE file used to store auth cookie (default: ./.Xauthority) -h --help display this usage message and exit -n NUM --server-num=NUM server number to use (default: 99) -l --listen-tcp enable TCP port listening in the X server -p PROTO --xauth-protocol=PROTO X authority protocol name to use (default: xauth command's default) -s ARGS --server-args=ARGS arguments (other than server number and "-nolisten tcp") to pass to the Xvfb server (default: "-screen 0 640x480x8")