Devariable domains

modules/system/variables/default.nix

@@ -0,0 +1,7 @@
+{ ... }:
+{
+  imports = [
+    ./ips
+    ./secrets
+  ];
+}

modules/system/variables/ips/default.nix

@@ -0,0 +1,15 @@
+{ config, lib, ... }:
+{
+  options.ips = lib.mkOption {
+    type = lib.types.attrs;
+    default = {};
+  };
+
+  config.ips = rec {
+    localSpan = "10.1.0";
+    server = "${localSpan}.2";
+    pc = "${localSpan}.4";
+    vm = "${localSpan}.5";
+    hx = "${localSpan}.70";
+  };
+}