With most caches, you are giving a lot of people a lot of access If you've been using Nix for any length of time, you've probably used projects that recommend adding their cache, and their signing key, to your Nix configuration. Or they do that sort-of-automatically, by setting the substituter in the flake.nix, so you are prompted to accept their cache when building anything. ? We strongly recommend against that. External caches give people with access to the cache an easy path to replacing most...