I have no plans to make the conversion. I would be very happy if someone were to contribute such a pull request! I heard someone maybe had gotten part of the way at the Collaboration meeting?
In terms of site-specific installs, there is an example in the archiver repository:
Inside of the top of the archiver repository, where “sitename” is replaced with a folder name within src/sitespecific/ or is the path to a folder with the site-specific build files.