{
  boot.kernel.sysctl = {
    "net.ipv6.conf.enp42s0.disable_ipv6" = true;
    "net.ipv6.conf.wlp4s0.disable_ipv6" = true;
    "net.ipv6.conf.tun0.disable_ipv6" = true;
  };

  networking.enableIPv6 = false;
}