However, if we look at the actual builds, we can see more recent builds which have passed
Nix channels - NixOS Wiki explains the lag but it seems to only refer to “nixos-unstable” as opposed to “nixpkgs-unstable”. In addition the page says:
Once the job succeeds at a particular nixpkgs commit, cache.nixos.org will download binaries from hydra.nixos.org. When the download completes, the channel updates.
nixpkgsis quickly updated since none of the above needs to happen once a channel update is triggered.
Now let’s assume I’m fine with not having packages in the cache and that I’m happy to have nix build them locally. How can I track the most recent commit which has been successfully built and tested?