A friend was asking about building an executable Jar with Scala and SBT. This ended up working for me. In a fresh SBT project, create the following files: project/build/AssemblyProject.scala (this file is lifted in its entirety from here - thanks to Nathan Hamblen) import sbt._ trait AssemblyProject extends BasicScalaProject { def assemblyExclude(base: PathFinder) = base / "META-INF" ** "*" def as