diff --git a/vre-singleuser-py311/Dockerfile b/vre-singleuser-py311/Dockerfile
index 3406fe1..4d36370 100644
--- a/vre-singleuser-py311/Dockerfile
+++ b/vre-singleuser-py311/Dockerfile
@@ -54,6 +54,18 @@ RUN chown -R $NB_UID /etc/ipython
 ENV JUPYTER_ENABLE_LAB=yes
 
 # Installing WDF-python env
+
+## HARDCODING ENVIRONMENT VARIABLES
+## not using venv, instead we use the base conda env and fixing env vars
+ENV LD_LIBRARY_PATH="/opt/conda/lib:$LD_LIBRARY_PATH"
+ENV PYTHONPATH="/opt/conda/lib/python3.9:/opt/conda/lib/python3.9/site-packages:$PYTHONPATH"
+
+## While the installation of pst4 and the use of `venv`, it is needed the `ENV_ROOT` env var
+## > echo $ENV_ROOT/
+## > /opt/venv/
+ENV ENV_ROOT="/opt/conda"
+
+
 COPY requirements.txt .  
 RUN pip3 install -r requirements.txt