> However, Nix does also supply the "nix run" command, which allows you to use software without installing it permanently (but without NixOS' configuration support).
What do you mean without config support? It runs a nix derivation which can be arbitrarily complex. Do you mean your /etc/nixos/configuration.nix file? Because you are not really using it either, only for creating a derivation that will become your system. A nix-shell of a user will by default use the user’s channel and may not do anything with the global config.
Yeah, I think they just mean without the conveniences of the NixOS module system. You can definitely bundle config with an app and store it in a repository's shell.nix or a flake or whatever.
What do you mean without config support? It runs a nix derivation which can be arbitrarily complex. Do you mean your /etc/nixos/configuration.nix file? Because you are not really using it either, only for creating a derivation that will become your system. A nix-shell of a user will by default use the user’s channel and may not do anything with the global config.