title: how to define multi-project build with sbt-native-packager that creates an RPM for each sub-project
body: <p>In all of the examples I've seen regarding multi-module builds and sbt-native-packager, they all aggregate the sub-projects into a single package.  I have sub-projects that each provide a micro-service.  I believe that each of these should have it's own native package, but I don't see how to do that and have a one command build for all of the sub-projects.</p>