nixos/configuration.nix

{ config, lib, pkgs, ... }:

with lib;

let
  # hint: use 'echo -n' so there is no newline char in the hostName file
  cfgPath = (builtins.toPath ("/etc/nixos/machines/" + (builtins.readFile /secret/hostName) + "/configuration.nix"));
in rec {
  imports = [
    cfgPath
    ./config/default.nix # same problem as above
    ./pkgs/nixpkgs.nix
    ./pkgs/pkgsets.nix
    ./services/default.nix # same problem as above
  ];
}