diff --git a/Dockerfile b/Dockerfile
index a74db71..99ab421 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -428,8 +428,7 @@ RUN ldconfig -v
 # Extra python packages for analysis
 ###############################################################################
 COPY ./python_packages.txt /etc/python_packages.txt
-RUN python3 -m pip install --no-cache-dir --break-system-packages --requirement /etc/python_packages.txt
-
+RUN python3 -m pip install --no-cache-dir --break-system-packages --ignore-installed --requirement /etc/python_packages.txt
 
 # Optional tools and developer utilities
 #
diff --git a/python_packages.txt b/python_packages.txt
index 42d29cb..1523b93 100644
--- a/python_packages.txt
+++ b/python_packages.txt
@@ -14,3 +14,4 @@ numba
 # ML training/testing libraries
 scikit-learn
 xgboost
+shap