http://nkuz2tpok7ctwd5ueer5bytj3bm42vp7lgjcsnznal3stotg6vyaakyd.onion/rbm_targets.html
For instance you could be doing nightly builds of your packages, local
test builds when you are working on the developpement of a new feature,
and from time to time build a package for a new release. In such
situation, you could use command line arguments to change the options,
or change the config file each time, but that is not very convenient.