diff --git a/Dockerfile b/Dockerfile
index 6b2b3fa..8592e8e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,26 +6,8 @@ LABEL maintainer="UC San Diego ITS/ETS <ets-consult@ucsd.edu>"
 USER root
 
 
-RUN     apt-get -q update && \
-        apt-get -qy install apt-utils && \
-        apt-get -qy dist-upgrade && \
-        apt-get -qy auto-remove && \
-        apt-get install -qy \
-                p7zip-full \
-                software-properties-common && \
-        apt-get clean && \
-        rm -rf /var/lib/apt/lists/*
 
-# CUDA 11-1
-RUN     wget -nv https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2004/x86_64/cuda-ubuntu2004.pin -O /etc/apt/preferences.d/cuda-repository-pin-600 && \
-        apt-key adv --fetch-keys https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2004/x86_64/3bf863cc.pub && \
-        wget https://developer.download.nvidia.com/compute/cuda/repos/$distro/$arch/cuda-keyring_1.0-1_all.deb && \
-        dpkg -i cuda-keyring_1.0-1_all.deb && \
-        add-apt-repository "deb http://developer.download.nvidia.com/compute/cuda/repos/ubuntu2004/x86_64/ /" && \
-        apt-get -q update && \
-        apt-get install -qqy cuda-11-1 cuda-nvcc-11-1	cuda-toolkit-11-1 && \
-
-# install cuda toolkit 
+# install cuda toolkit 11-1
 # https://developer.nvidia.com/cuda-11.1.0-download-archive?target_os=Linux&target_arch=x86_64&target_distro=Ubuntu&target_version=2004&target_type=debnetwork
 RUN apt-get update && \
     apt-get install -y p7zip-full software-properties-common && \
@@ -39,13 +21,10 @@ RUN apt-get update && \
     rm -rf /etc/apt/sources.list.d/nvidia-ml.list && \
     apt-get update  && \
 #apt-get -y install cuda && \
-    apt-get install -qqy cuda-11-1 cuda-nvcc-11-1 cuda-toolkit-11-1 && \
-    
-  wget -nv https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2004/x86_64/libcudnn8_8.0.5.39-1+cuda11.1_amd64.deb -O /var/tmp/libcudnn8.deb  && \
-  wget -nv https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2004/x86_64/libnccl2_2.8.4-1+cuda11.1_amd64.deb -O /var/tmp/libnccl2.deb  && \
-  dpkg -i /var/tmp/libcudnn8.deb /var/tmp/libnccl2.deb  && \
-  fix-permissions $CONDA_DIR  && \
-  fix-permissions /home/$NB_USER
+    apt-get install -qqy cuda-11-1 cuda-nvcc-11-1   cuda-toolkit-11-1 && \
+
+    fix-permissions $CONDA_DIR  && \
+    fix-permissions /home/$NB_USER
 
 
 COPY env.yml /tmp/env.yml
@@ -64,7 +43,7 @@ RUN conda env create --file /tmp/env.yml && \
 USER jovyan
 # other packages here... 
 
-
+# From the "original" 2022 version: 
 USER    $NB_UID:$NB_GID
 ENV     PATH=${PATH}:/usr/local/cuda/bin