name := "Hello Test #1"version := "1.0"scalaVersion := "2.11.2"resolvers += "Typesafe Repository" at "http://repo.typesafe.com/typesafe/releases/"libraryDependencies += "com.typesafe.akka" %% "akka-actor" % "2.3.4"This should do it. Note the %% and no version specified for the Akka artifact. Doing so, SBT will automatically append your Scala version to the artifact. See docs for more details.