[darwinbuild] Building root/header packages

Using darwinbuild, how do I create a root package? When I build I get a directory that I think I think is root. And it might be that simple, but where are the headers if there are header packages a project? - O.K. might be as clear as it could be, but I am not near my system to actually look. What I want to do is build the bsm-2.11 root package, which seems to depend on bsm-2.11 . Is it valid to build this in a non-chroot environment to create the root package? Can I just fake the bsm-2.11 requirement by renaming bsm-2.10 to bsm-2.11? TIA Michael