> The point is entirely different: if you update the channel-list you need the network for any changes to the configuration and I don't know of a way to go back

> The point is entirely different: if you update the channel-list you need the network for any changes to the configuration and I don't know of a way to go back to an earlier channel state. `nix-channel` does have a `--rollback` flag to it. However, I feel that Nix Flakes would allow you a better experience. With nix flakes, the revision of the nixpkgs input is persisted in a lockfile. You could check this file in somewhere, and then getting your working directory back to a known working state is much easier.