anchor.diff:      # for a caching DNS client.
       client =
       { ... }:
  -    let localProxyPort = 43; in
       {
         security.apparmor.enable = true;
   
  
positive.code:   testScript = ''
      client.wait_for_unit("dnsmasq")
      client.wait_for_unit("dnscrypt-proxy2")
    '';
  })
  
negative.code: import ./make-test-python.nix ({ pkgs, ... }: let
    localProxyPort = 43;
  in {
    name = "dnscrypt-proxy2";
    meta = with pkgs.lib.maintainers; {
      maintainers = [ joachifm ];
  