diff --git a/binder/appendix.txt b/binder/appendix.txt
index 9ed48ed..9876684 100644
--- a/binder/appendix.txt
+++ b/binder/appendix.txt
@@ -1,5 +1,5 @@
 USER root
-RUN export PYART_CONFIG='/home/jovyan/pyrad_config/mch_config.py' && \
+RUN echo "export PYART_CONFIG=/home/jovyan/pyrad_config/mch_config.py" >> ~/.profile && \
     rm -r /srv/conda/envs/notebook/lib/python3.9/site-packages/pyart_mch-1.8.1.dist-info/ && \
     rm -r /srv/conda/envs/notebook/lib/python3.9/site-packages/pyart && \
     pip install pyart_mch