{ config, lib, pkgs, ... }:
{
  config = lib.mkIf config.virtualisation.libvirtd.enable {
    virtualisation.libvirtd = {
      onBoot = "ignore";
      onShutdown = "shutdown";
      qemu = {
        ovmf = {
          enable = true;
          packages = with pkgs; [ OVMFFull.fd ];
        };
        vhostUserPackages = with pkgs; [ virtiofsd ];
        swtpm.enable = true;
      };
    };

    # Isolate devices into more IOMMU groups
    boot.kernelParams = [
      "pcie_acs_override=downstream,multifunction"
      "pci=routeirq"
    ];

    # Enable the gui manager
    programs.virt-manager.enable = builtins.elem "pc" config.system.nixos.tags;

    # Allow looking glass to be accessed by users
    systemd.tmpfiles.rules = [ "f /dev/shm/looking-glass 0660 - libvirtd -" ];

    environment.persistence."/persist".directories = [ "/var/lib/libvirt" ];
  };
}