Can customize unity in Ceedling 1.0.1?

[jodarse]

Hi! I work with a custom version of unity, and I would like ceedling to build and use it instead of using its own gem version.
I have tried editing yml project file adding :unity:/:path: :unity:/:unity_path: adding files into includes and source... but it always ends up building its own version of Unity.

I can make it work if I replace unity files (unity.c, unith.h and unity_internals.h) from the gem itself inside ruby installation path, but I was wondering if there is a more "configurable" way of doing it. Many thanks in advance!