Libvirt DHCP lease expiration

[NotBrianZach]

quickly restarting setups like this is problematic since it takes an hour for old leases to expire:
infrastructure-libvirtd.nix

let
  defaultConfig =
    {
      deployment.targetEnv = "libvirtd";
      deployment.libvirtd.privateIPv4 = "dhcp";
    };
in
{
  apiServer = defaultConfig;
  postgresqlServer = defaultConfig;
}

network.nix

  apiServer =
    { config, pkgs, ... }:
      systemd.services.postgrest = {
        description = "Wraps postgresql database with REST api";
        # Start the service after the network is available
        after = [ "network.target" ];
        wantedBy = [ "multi-user.target" ];
        serviceConfig = {
          # The actual command to run
          ExecStart = "${postgrest}/bin/postgrest postgres://root@postgresqlServer:5432/postgres \\
               --port 3030 \\
               --schema public \\
               --anonymous root \\
               --pool 200";
            }; 
  postgresqlServer =
    { config, pkgs ? import <nixpkgs> {}, ... }:
    { ...etc. etc. }

the postgrest service references the old ip address for postgresqlServer, of the previous deploy. attempt at a fix documented here