From e827876b78cd91461b0aa6e2b952f5a6af4017f7 Mon Sep 17 00:00:00 2001
From: Trevor Campbell <trevor.d.campbell@gmail.com>
Date: Thu, 16 Sep 2021 23:18:05 -0700
Subject: [PATCH] downgrade jupyter-client and nbclient in r-dsci-grading

---
 r-dsci-grading/Dockerfile | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/r-dsci-grading/Dockerfile b/r-dsci-grading/Dockerfile
index bb5ef6b0be..efa772f258 100644
--- a/r-dsci-grading/Dockerfile
+++ b/r-dsci-grading/Dockerfile
@@ -20,5 +20,9 @@ RUN jupyter serverextension enable --sys-prefix --py nbgrader
 # downgrade nbgrader to 5.6.1 so that feedback forms can be generated
 RUN pip install "nbconvert<6"
 
+# downgrade jupyter-client to 6.1.12 / nbclient to 0.5.3 to avoid errors with coroutines
+RUN pip install nbclient==0.5.3
+RUN pip install jupyter-client==6.1.12
+
 # switch user
 USER $NB_UID