packNGo: rtiostream_interface.c and rtiostream_tcpip.c are missing

I used packNGo on R2013a to grab all the code and compile the generated sources for my Simulink model somewhere else. Everything works fine for R2013a including external mode.

Now, I switched to R2014b and the files rtiostream_interface.c and rtiostream_tcpip.c are no longer part of the zip-file generated by packNGo. As a consequence, the build fails now, as these modules are missing.

Is there a way to tell packNGo to include these files in R2014b?

Thanks, Fabian