set bolty to static ip address and create a bridge

nixos/boxes/bolty/default.nix

@@ -1,4 +1,8 @@
-{ config, pkgs, inputs, lib, ... }: {
+{ config, pkgs, inputs, lib, ... }:
+let
+  physicalInterface = "enp4s0";
+  bridgeInterface = "br0";
+in {
   imports = [
     ./bolty-boot.nix
     ./real-hardware.nix
@@ -12,7 +16,24 @@
   networking = {
     hostName = "bolty";
     useDHCP = false;
-    interfaces.enp4s0.useDHCP = true;
+    defaultGateway = {
+      address = "10.0.0.1";
+      interface = "${bridgeInterface}";
+    };
+    nameservers = [ "91.239.100.100" "89.233.43.71" "1.1.1.1" ];
+    interfaces = {
+      "${physicalInterface}" = {
+        useDHCP = false;
+        wakeOnLan.enable = true;
+      };
+      "${bridgeInterface}" = {
+        ipv4.addresses = [{
+          "address" = "10.0.0.8";
+          "prefixLength" = 24;
+        }];
+      };
+    };
+    bridges = { "${bridgeInterface}".interfaces = [ "${physicalInterface}" ]; };
   };
   powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
 

nixos/boxes/bolty/home-assistant.nix

@@ -1,19 +1,17 @@
-{ config, pkgs, inputs, lib, ... }: {
+{ config, pkgs, inputs, lib, ... }:
+let port = 8123;
+in {
   imports = [ ];
 
-  networking.firewall.allowedTCPPorts = [ 8123 ];
-  virtualisation.oci-containers = {
-    backend = "podman";
-    containers.homeassistant = {
-      volumes = [ "home-assistant:/config" ];
-      environment.TZ = "Europe/London";
-      image =
-        "ghcr.io/home-assistant/home-assistant:stable@sha256:5e3d2dde141812a4a54c140f3cbf52b9c74168bf25e8560978f499578902a363";
-      extraOptions = [
-        "--network=host"
-        "--privileged"
-        "--device=/dev/ttyACM1:/dev/ttyACM1"
-      ];
+  networking.firewall.allowedTCPPorts = [ port ];
+
+  boot.kernelModules = [ "kvm_amd" ];
+  virtualisation = {
+    libvirtd = {
+      enable = true;
+      qemu.ovmf.enable = true;
     };
   };
+  environment.systemPackages = with pkgs; [ qemu virt-manager usbutils ];
+
 }