You can choose to use the DSL (build.sbt) or a full-blown build file written in Scala (Build.scala). We use the latter but we have a very complex build—multi-J

You can choose to use the DSL (build.sbt) or a full-blown build file written in Scala (Build.scala). We use the latter but we have a very complex build—multi-JVM testing, half-dozen subprojects.