diff --git a/repo2docker/buildpacks/base.py b/repo2docker/buildpacks/base.py
index d3e8ec40..0743a72a 100644
--- a/repo2docker/buildpacks/base.py
+++ b/repo2docker/buildpacks/base.py
@@ -188,6 +188,9 @@
 ENV PYTHONUNBUFFERED=1
 COPY /python3-login /usr/local/bin/python3-login
 COPY /repo2docker-entrypoint /usr/local/bin/repo2docker-entrypoint
+USER root
+RUN chmod 0755 /usr/local/bin/python3-login /usr/local/bin/repo2docker-entrypoint
+USER ${NB_USER}
 ENTRYPOINT ["/usr/local/bin/repo2docker-entrypoint"]
 
 # Specify the default command to run