From what the help suggests I assume -m option is there to have an opportunity redirecting /var/bigbluebutton into a different place/space. Unfortunately it is broken. The symlink creation is being run at a stage where /var/bigbluebutton does already exist. So e.g. if you run it with -m "/data" it will create a link "/var/bigbluebutton/data" -> "/data" which is useless b/c nothing is using this path. It should be run before the relevant packages are being installed, this way it should work.
From what the help suggests I assume -m option is there to have an opportunity redirecting /var/bigbluebutton into a different place/space. Unfortunately it is broken. The symlink creation is being run at a stage where /var/bigbluebutton does already exist. So e.g. if you run it with -m "/data" it will create a link "/var/bigbluebutton/data" -> "/data" which is useless b/c nothing is using this path. It should be run before the relevant packages are being installed, this way it should work.