Understanding `libraryDependencies` with respect to Scala Version in `build.sbt`

[Kevin Meredith]

My incomplete understanding is that, differing Scala major versions may not be compatible with each other.

So, a library compiled on Scala 2.9 will likely not work with a Scala 2.10 library.

Given the following `build.sbt`:

    name := "Foobar"

    

    version := "1.0"

    

    scalaVersion := "2.11.4"

    

    libraryDependencies += "com.typesafe.akka" %% "akka-actor" % "2.3.4"

Does **sbt** only pull down the `akka-actor` library that's compatible with Scala version: `2.11.4`?

[nafg]

%% is just a shortcut for (in this case) % "akka-actor_2.11"