no sources published for sbt-plugin

with idea with-sources=yes sbt-classifiers i get no sources for sbt-plugin
looking here http://repo.typesafe.com/typesafe/ivy-releases/com.typesafe.play/sbt-plugin/scala_2.10/sbt_0.13/2.2.0/ they are indeed missing
They were published for play 2.1, so that's kinda frustrating.