def add_dependencies deps def emitter target source env env Depends ta

def add_dependencies(deps):
        def emitter(target, source, env):
                env.Depends(target, deps)
                return target, source
        return emitter

env.Append(BUILDERS = {'Stem': Builder(action=str(stemmer[0])+' < $SOURCE > $TARGET',
                                       emitter=add_dependencies(stemmer))})