diff --git a/modules/builder/module.json b/modules/builder/module.json
index d061ed7..0444466 100644
--- a/modules/builder/module.json
+++ b/modules/builder/module.json
@@ -37,7 +37,7 @@
       "type": "file",
       "path": "/var/lib/mesh/builder/builder.env",
       "mode": "0600",
-      "content": "MESH_BROKER_FILE=/run/mesh/broker\nMESH_NODE=${machine:name}\nMESH_REGISTRY=127.0.0.1:${bound:artifact-store:port}\nMESH_WORKSPACE=/workspace\n"
+      "content": "MESH_BROKER_FILE=/run/mesh/broker\nMESH_NODE=${machine:name}\nMESH_REGISTRY=${bound:artifact-store:at}:${bound:artifact-store:port}\nMESH_WORKSPACE=/workspace\n"
     },
     {
       "id": "server",