No, from what I can work out, those kits are deprecated? They just aren’t available in the repo.
Actually, that might be my exact issue. I have DOZENS of repos in my old system, perhaps there’s a development one that I’m missing. I’ll work out how to dig through the repos in the sources.list and see where those dependencies are located and why/how it matters.
As mentioned, this is a completely new install without any development tools yet added (other than Xojo and it’s dependencies as noted). Whereas on my old system, I had every tool chain under the sun installed. Both a good and bad thing