update construction README

we won't depend on it (i force that)
but it's good to allow following

cerulean/default.nix

@@ -21,7 +21,7 @@ mix.newMixture args (mixture: {
     ./nexus
   ];
 
-  version = "0.2.2";
+  version = "0.2.1";
 
   nixosModules = rec {
     default = cerulean;

cerulean/nexus/nexus.nix

@@ -51,8 +51,8 @@
       ;
   in {
     base = null;
-    modules = [];
-    args = Terminal {};
+    extraModules = [];
+    specialArgs = Terminal {};
 
     groups = Terminal {};
     nodes = Terminal {};
@@ -189,16 +189,19 @@ in {
           node,
           ...
         }: let
-          nixosDecl = lib.nixosSystem rec {
+          nixosDecl = lib.nixosSystem {
             system = node.system;
-            specialArgs =
-              nexus.args
-              // node.args
-              // {
-                inherit root specialArgs;
-                inherit (node) system;
-                _deploy-rs = inputs.deploy-rs;
-              };
+            specialArgs = let
+              specialArgs =
+                nexus.specialArgs
+                // node.specialArgs
+                // {
+                  inherit root specialArgs;
+                  inherit (node) system;
+                  _deploy-rs = inputs.deploy-rs;
+                };
+            in
+              specialArgs;
             modules =
               [
                 self.nixosModules.default
@@ -208,8 +211,8 @@ in {
                 # inputs.microvm.nixosModules.microvm
               ]
               ++ (getGroupModules root nodeName node)
-              ++ node.modules
-              ++ nexus.modules;
+              ++ node.extraModules
+              ++ nexus.extraModules;
           };
         in
           nixosDecl

cerulean/nexus/nodes.nix

@@ -35,8 +35,8 @@ in rec {
     enabled = true;
     system = missing "its system architecture" "system";
     groups = [];
-    modules = [];
-    args = Terminal {};
+    extraModules = [];
+    specialArgs = Terminal {};
 
     base = null;
 

cerulean/nexus/snow.nix

@@ -24,10 +24,10 @@
       types
       ;
   in {
-    modules = mkOption {
+    extraModules = mkOption {
       type = types.listOf types.path;
     };
-    args = mkOption {
+    specialArgs = mkOption {
       type = types.attrs;
     };