[Emacs][scala-mode] Makefile misses "scala-mode-variables"

Hello there!

I am not quite shure, if this is the right place for me to post this, but except for the github page - which seems to be a mirror repo only - i did not find any other contact information.

So, here we go:
After running make and pointing emacs to the compiled .elc files, emacs always complained about not being able to open a scala file type, or something similar, i do not have the exact wording in mind. So i added the following line to the Makefile after line 35:

ELISP_FILES        += scala-mode-variables

After running make again, emacs stopped complaining and worked as it is supposed to do.

This is my setup:
Emacs GNU Emacs 23.4.1
Archlinux

If you need further information please do not hesitate to ask.