Get rid of main-{scalaVersion}-Directories in sbt - scala

Question

I've changed the default src directory according to: http://www.scala-sbt.org/0.13.2/docs/Howto/defaultpaths.html
to:
scalaSource in Compile := baseDirectory.value / "src/main"
javaSource in Compile := baseDirectory.value / "src/main"
scalaSource in Test := baseDirectory.value / "src/test"
javaSource in Test := baseDirectory.value / "src/test"
resourceDirectory in Compile := baseDirectory.value / "res"
resourceDirectory in Test := baseDirectory.value / "res/test"
Now whenever intellij/idea reloads it adds back main-2.11 and test-2.11 folders.
I want to get rid of those, but I've not found a way for now. Any ideas?
edit: I've already deleted the whole .idea and other folders for IntelliJ and re-imported the project with the .sbt file. Still no luck. On every startup or change of the .sbt these annoying folders are re-created. Grrr!

Answer 1

The problem might rather lie with sbt. If you open sbt console and enter
show sourceDirectories
the result might still include the scala-2.11 folders.
If so the following lines would fix that:
sourceDirectories in Compile <<= (sourceDirectories in Compile) { dirs =>
dirs.filterNot(_.absolutePath.endsWith("-2.11"))
}
sourceDirectories in Test <<= (sourceDirectories in Test) { dirs =>
dirs.filterNot(_.absolutePath.endsWith("-2.11"))
}