diff --git a/images/bromite-build/Dockerfile b/images/bromite-build/Dockerfile
index ce595fa..17a76cc 100644
--- a/images/bromite-build/Dockerfile
+++ b/images/bromite-build/Dockerfile
@@ -15,5 +15,7 @@ RUN sudo chmod +x ./start-build.sh \
     && \
     sudo chmod +x ./pre-start.sh \
     && \
-    sudo chmod 775 ./goma_auth.py
+    sudo chmod 775 ./goma_auth.py \
+    && \
+    ./pre-start.sh