Also, as a benefit, by tracking the JSON and lockfile, the CI can work with the exact same environment. This benefit is also possible under both Nix flakes (in

Also, as a benefit, by tracking the JSON and lockfile, the CI can work with the exact same environment. This benefit is also possible under both Nix flakes (inherently) and vanilla Nix. The latter takes mild deliberate effort to not use channels-based import syntax but instead a fetcher with a pinned URL argument.