{ pkgs, ... }:
let
  wolScript = stdenv.mkDerivation {
    name = "wol-script";
    outputHashMode = "recursive";
    outputHashAlgo = "sha256";
    outputHash = sha256;
    builder = writeShellScript "wol-lease" ''
      IP=$(cat /var/lib/kea/dhcp4.leases | grep $1 | awk -F, '{print $1}' | tail -n 1);
      MAC=$(cat /var/lib/kea/dhcp4.leases | grep $1 | awk -F, '{print $2}' | tail -n 1);
      ${pkgs.wol}/bin/wol -i $IP $MAC
    '';
  };
in
{
  environment.systemPackages = [ 
    wolScript
  ];
}