{
  dnsutils,
  writeShellApplication,
}:
writeShellApplication {
  name = "myip";
  runtimeInputs = [dnsutils];
  text = ''
    dig -4 +short @resolver1.opendns.com myip.opendns.com A
    dig -6 +short @resolver1.opendns.com myip.opendns.com AAAA
  '';
}