many changes and more modularizing

hosts/fw/modules/home-assistant/default.nix

@@ -6,6 +6,7 @@ let
     url = "https://github.com/nixos/nixpkgs/";
     rev = "41dea55321e5a999b17033296ac05fe8a8b5a257";
   }) {};
+  networkPrefix = config.networkPrefix;
 in
 {
   users.users.hass = {
@@ -35,8 +36,8 @@ in
     ephemeral = false;
     privateNetwork = true;
     hostBridge = "server";
-    hostAddress = "10.42.97.1";
-    localAddress = "10.42.97.20/24";
+    hostAddress = "${networkPrefix}.97.1";
+    localAddress = "${networkPrefix}.97.20/24";
     extraFlags = [
       "--capability=CAP_NET_ADMIN"
       "--capability=CAP_MKNOD"
@@ -74,7 +75,9 @@ in
       };
     };
     config = { lib, config, pkgs, ... }: {
+      networkPrefix = networkPrefix;
       imports = [
+        ../network-prefix.nix
         ./3dprinter.nix
         ./ac.nix
         # ./aeg.nix
@@ -103,11 +106,11 @@ in
         hostName = "home-assistant";
         useHostResolvConf = false;
         defaultGateway = {
-          address = "10.42.96.1";
+          address = "${networkPrefix}.96.1";
           interface = "eth0";
         };
         firewall.enable = false;
-        nameservers = [ "10.42.97.1" ];
+        nameservers = [ "${networkPrefix}.97.1" ];
       };
 
       environment.systemPackages = [