After having some issues getting this to build (as I suspect others have also encountered), I attempted to put everything into a Dockerfile so that this problem only would need solving once.

I have just now realized that the current setup doesn't allow for a clean build only from the GitHub source and requires some files from the sourceforge repo.

So before I go any further with this, is there any interest in adding in a Dockerfile that grabs the compressed archive from sourceforge and just manually copies the necessary files into the lib folder of openccg prior to building with ant?