I opened a PR a few days ago to try to fix the issue I ran into with nix-env -u trying to upgrade to a weird alpha pre-release version of Python. In my head, I was making the world a better place. It was an issue that bit me; it was an issue that bit someone who emailed me; it seemed like an issue worth fixing. But the maintainer of Python responded to that PR with: I don’t think we should be doing this. Yes, it resolves the issue for python3, but there are others out there as well. “It i...