diff --git a/tools/python/runtime_binary.sh b/tools/python/runtime_binary.sh
index 8380424..9cd1519 100755
--- a/tools/python/runtime_binary.sh
+++ b/tools/python/runtime_binary.sh
@@ -36,4 +36,5 @@
 
 export LD_LIBRARY_PATH="${BASE_PATH}/usr/lib/lapack:${BASE_PATH}/usr/lib/libblas:${BASE_PATH}/usr/lib/x86_64-linux-gnu"
 
-exec "$BASE_PATH"/usr/bin/python3 "$@"
+# Prevent Python from importing the host's installed packages.
+exec "$BASE_PATH"/usr/bin/python3 -sS "$@"