NixOS is declarative in a comprehensive way OOTB, so that there's no other way to do it Nix the standalone package manager offers some imperative ways of doing

NixOS is declarative in a comprehensive way OOTB, so that there's no other way to do it Nix the standalone package manager offers some imperative ways of doing things, plus you can declare a package that depends on all your needs. Then there are a couple of optional declarative systems that you can use with standalone Nix which add extra functionality, like configuring services in a NixOS-like way or managing your dotfiles