diff --git a/modules/mailu/automx/Dockerfile b/modules/mailu/automx/Dockerfile
index 7fd7933..80ae1b9 100644
--- a/modules/mailu/automx/Dockerfile
+++ b/modules/mailu/automx/Dockerfile
@@ -21,6 +21,18 @@ RUN ./setupvenv.sh \
    && . .venv/bin/activate \
    && pip install automx2
 
+# The launcher `start` expects. In the predecessor's image this wrapper appeared during a build
+# step that never made it into the files this module carries — the image worked and the recipe
+# could not reproduce it. Written here explicitly, verbatim from the proven image, so the build
+# is the whole truth about the image again.
+RUN mkdir -p .venv/scripts && printf '%s\n' \
+   '#!/usr/bin/env bash' \
+   'set -euo pipefail' \
+   '. .venv/bin/activate' \
+   "export FLASK_ENV='production'" \
+   "export FLASK_APP='automx2.server:app'" \
+   'flask "$@"' > .venv/scripts/flask.sh && chmod +x .venv/scripts/flask.sh
+
 ENV AUTOMX2_CONF=/etc/automx2.conf
 ADD automx/files/automx2.conf /etc/automx2.conf