so I just stumbled across this thread and was thinking this is would be a perfect test for my conan-cmake based build approach for VCVRack (see also Build VCVRack with Conan and CMake + add CI).
So I merged the extra branch with the work from my branch and let it build on Azure CI server (merged branch is here). Took me 2 minutes. You can find now the Rack-extra build under https://github.com/qno/VCVRack-Release-Demo/releases/tag/Nightly for Windows, Linux and MacOS. Artifacts are called Rack-extra and can be downloaded from this page.
I didn’t test the builds, but it would be nice if someone tries it and can give some feedback if it works. With this I mean, if it is working with regular VCVRack Plugins, as the build process has a complete different approach. I never tested this for MacOS, as I don’t have a Mac.