diff --git a/modules/builder/module.json b/modules/builder/module.json
index e7fa8dd..adf5dc7 100644
--- a/modules/builder/module.json
+++ b/modules/builder/module.json
@@ -45,6 +45,12 @@
       "type": "file",
       "path": "/var/lib/mesh/builder/package-registry.json",
       "mode": "0600",
+      "merge": "json",
+      "protected": [
+        "provision",
+        "from",
+        "as"
+      ],
       "content": "{\"provision\": \"package-registry\", \"from\": \"gitea\", \"at\": \"127.0.0.1\", \"as\": \"mesh-builder\", \"serves\": {\"scheme\": \"http\", \"port\": 3000, \"npm-path\": \"/api/packages/novox/npm/\"}}\n"
     },
     {