diff --git a/modules/postgres/Dockerfile b/modules/postgres/Dockerfile
index 43cbc3b..80bef5f 100644
--- a/modules/postgres/Dockerfile
+++ b/modules/postgres/Dockerfile
@@ -34,5 +34,5 @@ COPY --from=build /app/modules/postgres/dist /app/modules/postgres/dist
 # and is not listed here — the declaration names it in the container's `args`, because it is what
 # this module's own container runs. One image, because they are one module and share a client.
 ENV MESH_TOOL_MODULES=/app/modules/postgres/dist/index.js,/app/modules/postgres/dist/tools/index.js
-
-# Moved to prove the mesh follows its own catalogue.
+# A real change, so the artifact itself moves and not only the commit.
+ENV MESH_MODULE=postgres