-- trivial.nix
{
  network.description = "Web server";
  webserver =
    { config, pkgs, ... }:
    {
      services.httpd.enable = true;
      services.httpd.adminAddr = "[email protected]";
      services.httpd.documentRoot = "${pkgs.valgrind.doc}/share/doc/valgrind/html";
      networking.firewall.allowedTCPPorts = [ 80 ];
    };
}

-- trivial-env.nix
{
  webserver =
    { config, pkgs, ... }:
    {
    imports = [ ./hardware-configuration.nix ];
    deployment.targetHost = "nixos";
    };
}