These are indeed valid concerns, and I think that it’s fair for the community to be vigilant about such things and to ask probing questions. But my perspective

These are indeed valid concerns, and I think that it’s fair for the community to be vigilant about such things and to ask probing questions. But my perspective is both: - Nothing we’re doing is inherently proprietary or "secret sauce". FlakeHub isn’t doing anything magical, and the version solving feature would be better if Nix did it itself. - Also, proprietary services can serve important functions in OSS communities. They can expand the user base significantly (like GitHub to Git) and they can send signals to maintainers of official tools about what’s a hit and what’s a dud. And I think that that’s precisely what we’re doing not just with FlakeHub but also with the Determinate Nix Installer, the Magic Nix Cache, the Flake Checker, and others.