Extract networking domain from host configs

flake.nix

@@ -55,13 +55,14 @@
     let
       inherit (nixpkgs) lib;
 
+      domain = "mesh.vimium.net";
       forEverySystem = lib.getAttrs lib.systems.flakeExposed;
       forEachSystem = lib.genAttrs [
         "x86_64-linux"
         "aarch64-linux"
       ];
       mkDeployNode = hostName: {
-        hostname = "${hostName}.mesh.vimium.net";
+        hostname = "${hostName}.${domain}";
 
         profiles.system = {
           user = "root";
@@ -89,7 +90,12 @@
             specialArgs = { inherit self; };
 
             modules = [
-              { networking.hostName = name; }
+              {
+                networking = {
+                  inherit domain;
+                  hostName = name;
+                };
+              }
               ./hosts/${name}
             ];
           }))