nixos/machines/newton/hardware-configuration.nix

{ config, pkgs, lib, modulesPath, ... }:
{
  imports = [ (modulesPath + "/profiles/qemu-guest.nix") ];

  boot.initrd.availableKernelModules = [
    "ata_piix"
    "sd_mod"
    "uhci_hcd"
    "virtio_pci"
    "virtio_scsi"
  ];
  boot.initrd.kernelModules = [
    "dm-snapshot"
  ];

  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
}