Inventory/modules: use explicit roles only

clanModules/state-version/default.nix

@@ -1,18 +1,6 @@
-{ config, lib, ... }:
-let
-  var = config.clan.core.vars.generators.state-version.files.version or { };
-in
+# Dont import this file
+# It is only here for backwards compatibility.
+# Dont author new modules with this file.
 {
-  system.stateVersion = lib.mkDefault var.value;
-
-  clan.core.vars.generators.state-version = {
-    files.version = {
-      secret = false;
-      value = lib.mkDefault lib.version;
-    };
-    runtimeInputs = [ ];
-    script = ''
-      echo -n ${lib.versions.majorMinor config.system.stateVersion} > $out/version
-    '';
-  };
+  imports = [ ./roles/default.nix ];
 }

clanModules/state-version/roles/default.nix

@@ -0,0 +1,18 @@
+{ config, lib, ... }:
+let
+  var = config.clan.core.vars.generators.state-version.files.version or { };
+in
+{
+  system.stateVersion = lib.mkDefault var.value;
+
+  clan.core.vars.generators.state-version = {
+    files.version = {
+      secret = false;
+      value = lib.mkDefault lib.version;
+    };
+    runtimeInputs = [ ];
+    script = ''
+      echo -n ${lib.versions.majorMinor config.system.stateVersion} > $out/version
+    '';
+  };
+}