I'd like to produce two packages from a common base. Specifically a
NAS verson of mpg123 along with a native version. This could be done
using make variables, however that is not appropriate as it will not
produce two binary packages. Failing a complete re-organisation of the
pkg build system, my intention is this:

Move the current mpg123 package to mpg123-base. Create two other
packages mpg123-native and mpg123-nas. Have these two packages include
-base with the obvious over-rides. Possibly modify bsd.pkg.mk to do this
cleanly.

Julian.