"As of Scala 2.11, this library is a separate jar that can be omitted from Scala projects that do not use Parser Combinators." Can you please consider add it to the tree again?
They are probably included with the scala installation in /usr/share/scala/lib. You just need to add them to your CLASSPATH. But probably you are also affected by bug #532694. A possible quick workaround could be to create a symlink to the correct file (with the symlink having a .jar file name ending).
Not interested anymore.