Hi Dafydd Harries,
I adopted this package as a way to learn more about packaging and Debian community. As result, I intend to keep this package in a good shape. I already updated the package and I am working to update it for debhelper 10.
I looked at the bug report and your patch. As far as I understood "Requires.private" and other stuff does not exist in the new package version. If you still interested in this problem, please let me know. Otherwise, I will close this bug soon.
-- Rodrigo Siqueira Graduate Student Department of Computer Science University of São Paulo