{
  pkgs,
  extraModules,
  vhack,
  ...
}:
vhack.runTest {
  name = "sharkey-cpu";

  nodes = {
    server = {config, ...}: {
      imports =
        extraModules
        ++ [
          ../../../../modules
        ];

      vhack = {
        persist.enable = true;
        nginx.enable = true;
        sharkey = {
          enable = true;
          fqdn = "sharkey.server";
        };
      };
      systemd.services = {
        # Avoid an error from this service.
        "acme-sharkey.server".enable = false;

        # Test that sharkey's hardening still allows access to the CPUs.
        sharkey.serviceConfig.ExecStart = let
          nodejs = pkgs.lib.getExe pkgs.nodejs;
          script = pkgs.writeTextFile {
            name = "script.js";
            text =
              # js
              ''
                import * as os from 'node:os';

                var cpus = os.cpus()

                if (cpus.length != 0) {
                  console.log(cpus[0].model)
                } else {
                  // Fail?
                }

                while (true) {
                }
              '';
          };
        in
          pkgs.lib.mkForce "${nodejs} ${script}";
      };
    };
  };

  services = [
    {server = "sharkey.service";}
  ];

  testScript = {...}:
  # Python
  ''
    from time import sleep

    # Give the service time to run.
    sleep(3)
  '';
}