{ sources, ... }: {
  functor = {
    enable = true;
    external = [
      (import (sources.arcexprs + "/modules")).nixos
      (import (sources.katexprs + "/modules")).nixos
      (import (sources.impermanence + "/nixos.nix"))
      (import sources.anicca).modules.nixos
      (sources.tf-nix + "/modules/nixos/secrets.nix")
      (sources.tf-nix + "/modules/nixos/secrets-users.nix")
    ];
  };
}