Yup. Here's a mental model you may find useful: in Nix, the process executed by the build graph is always purely functional. But when you run `nix-build`, it ha

Yup. Here's a mental model you may find useful: in Nix, the process executed by the build graph is always purely functional. But when you run `nix-build`, it has to compute the build graph, and that is not necessarily functional. Nix flakes provide a functional way to generate the build graph