{ config, libs, pkgs, ... }: { networking.bridges.virtbr0.interfaces = [ "enp4s0" ]; boot.kernel.sysctl."net.ipv4.ip_forward" = 1; networking.interfaces.virtbr0 = { useDHCP = true; }; virtualisation.libvirtd = { enable = true; allowedBridges = [ "virtbr0" ]; }; }