opts.Add(ListOption('statetrackers', 'state trackers to build', default_statetrackers,
['mesa', 'python']))
opts.Add(ListOption('drivers', 'pipe drivers to build', default_drivers,
opts.Add(ListOption('statetrackers', 'state trackers to build', default_statetrackers,
['mesa', 'python']))
opts.Add(ListOption('drivers', 'pipe drivers to build', default_drivers,