I’m not sure what you mean.
The mk file is here:
It simply clones a git repository and builds it.
The magic happens on that repository, upstream version is here: https://github.com/x37v/pdLV2/
The quickiest way right now to push your own patch would be to fork that repository, create a pd patch based on the provided template in the repo, and modify the repository Makefile and mod-plugin-builder mk file to build just that new pd-plugin bundle.
This is by no means an easy task though…