{ config, lib, pkgs, modulesPath, desktop, username, ... }: {
  imports = [ 
    ./disks.nix
  ];
  nixpkgs.config.allowUnfree = false;

  boot.initrd.availableKernelModules = [ "ata_piix" "ohci_pci" "virtio_pci" "virtio_blk" "sr_mod" ];
  boot.initrd.kernelModules = [ ];
  boot.kernelModules = [ ];
  boot.extraModulePackages = [ ];
  virtualisation.hypervGuest.enable = true;

  networking.useDHCP = lib.mkDefault true;
  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
  time.timeZone = "Asia/Tokyo";
  networking.hostName = "osaka-vultr-01";

  boot.loader.grub = {
    enableCryptodisk = true;
    enable = true;
    device = "/dev/vda";
    efiSupport = true;
    efiInstallAsRemovable = true;
    useOSProber = true;
  };
  
  networking.firewall.allowedTCPPorts = [ 22 ];
}