diff --git a/Dockerfile b/Dockerfile
index d33742966..2ad2936fb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -171,6 +171,11 @@ ARG ETHERPAD_GITHUB_PLUGINS=
 ENV NODE_ENV=production
 ENV ETHERPAD_PRODUCTION=true
 
+# The full pnpm-workspace.yaml references admin, doc, ui which are not
+# needed at runtime. Overwrite it with a production-only version so
+# pnpm install doesn't warn about missing workspace directories.
+RUN printf 'packages:\n  - src\n  - bin\n' > pnpm-workspace.yaml
+
 COPY --chown=etherpad:etherpad ./src ./src
 COPY --chown=etherpad:etherpad --from=adminbuild /opt/etherpad-lite/src/templates/admin ./src/templates/admin
 COPY --chown=etherpad:etherpad --from=adminbuild /opt/etherpad-lite/src/static/oidc ./src/static/oidc