{ hostName, flake, config, pkgs, lib, ... }:
{
  imports = with flake.nixosModules.systemProfiles; [
    ./zfs.nix ./network.nix ./samba.nix ./dns.nix ./prometheus.nix
    initrd-all-crypto-modules default-locale openssh rebuild-machines
    build-server
    initrd-ssh
  ];

  config = {
    nixpkgs = {
      system = "x86_64-linux";
    };

    networking.hostId = "1e7ddd78";
    environment.etc."machine-id".text = "1e7ddd784c525bba2a03d7c160c5da4e";

    boot = {
      loader.grub = {
        enable = true;
        version = 2;
        device = "/dev/disk/by-id/ata-SuperMicro_SSD_SMC0515D95019BDF4083";
      };

      kernelPackages = pkgs.linuxPackages_latest;
      kernelModules = [ "kvm-intel" ];

      kernelParams = [
        "ip=10.141.0.1:::255.255.255.0::eno1:static"
      ];

      tmpOnTmpfs = true;

      initrd = {
        supportedFilesystems = [ "zfs" ];
        availableKernelModules = [ "ehci_pci" "ahci" "nvme" "isci" "xhci_pci" "usb_storage" "usbhid" "sd_mod" "sr_mod" "drbg" "rtsx_pci_sdmmc" "libsas" "scsi_transport_sas" "e1000e" ];
        kernelModules = [ "dm-raid" "dm-integrity" "dm-snapshot" "dm-thin-pool" ];

        luks.devices = {
          nvm0.device = "/dev/disk/by-label/${hostName}-nvm0";
          nvm1.device = "/dev/disk/by-label/${hostName}-nvm1";
          
          hdd0.device = "/dev/disk/by-label/${hostName}-hdd0";
          hdd1.device = "/dev/disk/by-label/${hostName}-hdd1";
          hdd2.device = "/dev/disk/by-label/${hostName}-hdd2";
          hdd3.device = "/dev/disk/by-label/${hostName}-hdd3";
          hdd4.device = "/dev/disk/by-label/${hostName}-hdd4";
          hdd5.device = "/dev/disk/by-label/${hostName}-hdd5";
        };

        network.flushBeforeStage2 = false;
      };
      
      supportedFilesystems = [ "zfs" ];
      zfs = {
        enableUnstable = true;
      };
    };

    fileSystems = {
      "/" = {
        fsType = "tmpfs";
        options = [ "mode=0755" ];
      };
    };
    
    services.timesyncd.enable = false;
    services.chrony = {
      enable = true;
      servers = [];
      extraConfig = ''
        allow 10.141.1.0/24
        local

        pool time.cloudflare.com iburst nts
        pool nts.ntp.se iburst nts
        server nts.sth1.ntp.se iburst nts
        server nts.sth2.ntp.se iburst nts
        server ptbtime1.ptb.de iburst nts
        server ptbtime2.ptb.de iburst nts
        server ptbtime3.ptb.de iburst nts

        leapsectz right/UTC

        makestep 0.1 3

        cmdport 0
      '';
    };

    services.openssh = {
      enable = true;
      passwordAuthentication = false;
      challengeResponseAuthentication = false;
      extraConfig = ''
        AllowGroups ssh
      '';
    };
    users.groups."ssh" = {
      members = ["root"];
    };

    security.sudo.extraConfig = ''
      Defaults lecture = never
    '';

    nix = {
      daemonCPUSchedPolicy = "batch";
      daemonIOSchedClass = "idle";

      gc = {
        automatic = true;
        options = "--delete-older-than 30d";
      };
    };

    powerManagement = {
      enable = true;

      cpuFreqGovernor = "schedutil";
    };
  };
}