1{ lib, pkgs, ... }:
 2{
 3  system.nixos.tags = [ "libvirt" ];
 4  boot.kernelParams = [ "kvm_intel.nested=1" ];
 5  environment.etc."modprobe.d/kvm.conf".text = ''
 6    options kvm_intel nested=1
 7  '';
 8  virtualisation.libvirtd = {
 9    enable = true;
10    allowedBridges = [ "br1" ]; # Could be different dependinng on the host ?
11    extraConfig = ''
12      listen_tls = 0
13      listen_tcp = 1
14      auth_tcp="none"
15      tcp_port = "16509"
16    '';
17    # extraOptions = [ "--listen" ];
18  };
19  networking.firewall.allowedTCPPorts = [ 16509 ];
20  security.polkit.enable = true; # 22.11: libvirtd requires poltkit to be enabled
21  environment.systemPackages = with pkgs; [
22    qemu
23    vde2
24    libosinfo
25  ];
26  boot.kernel.sysctl = {
27    "net.ipv4.ip_forward" = lib.mkDefault 1;
28  };
29}