{ pkgs, hexname-backend, ... }:

{
  nixpkgs.overlays = [
    (self: super: {
      hexname-backend = hexname-backend.packages.${super.stdenv.hostPlatform.system}.default;
    })
  ];

  users.groups.hexname = {};
  users.users = {
    hexname-backend = {
      group = "hexname";
      isSystemUser = true;
      createHome = true;
      home = "/var/lib/hexname/backend";
    };
  };

  systemd.services.hexname-backend = {
    after = [ "network.target" ];
    wantedBy = [ "multi-user.target" ];
    environment = {
      ENV_PATH = "/etc/env/hexname/backend.env";
    };
    serviceConfig = {
      User = "hexname-backend";
      Group = "hexname";
      Type = "simple";
      Restart = "always";
      ExecStart = "${pkgs.hexname-backend}/bin/dns-backend";
    };
  };
}