anchor.diff:                server = domain;
               };
               systemd.tmpfiles.rules = [
  -              "f /root/pw 0666 root root - foo"
  +              "f /root/pw 0666 root root - ${password}"
               ];
               environment.systemPackages = [
                 pkgs.nagiosPluginsOfficial
  
positive.code: import ./make-test-python.nix (
    { pkgs, ... }: let
      domain = "whatever.example.com";
    in
      {
        name = "iodine";
  
negative.code:               services.iodine.server = {
                  enable = true;
                  ip = "10.53.53.1/24";
                  passwordFile = "${builtins.toFile "password" password}";
                  inherit domain;
                };
  
  