Is it closed source? Why make flox instead of further developing nix?

We are doing heavy re-factoring and re-design, so there isn’t much useful to see at this point. We are looking to refine the design and user experience. We do plan to have all the client portions open-source once we have less churn.

Most of what we are working on are either new concepts or don’t belong in Nix itself. As we see portions that are appropriate to upstream, we will do so. That being said, we have already done a fair bit of Nix development and continue to do so.