diff --git a/tools/distrib/isort_code.sh b/tools/distrib/isort_code.sh
index 897200b5a96..08b4e5a18cc 100755
--- a/tools/distrib/isort_code.sh
+++ b/tools/distrib/isort_code.sh
@@ -53,5 +53,6 @@ $PYTHON -m isort $ACTION \
   --skip-glob "third_party/*" \
   --skip-glob "*/env/*" \
   --skip-glob "*pb2*.py" \
+  --skip-glob "**/site-packages/**/*" \
   --dont-follow-links \
   "${DIRS[@]}"
diff --git a/tools/distrib/yapf_code.sh b/tools/distrib/yapf_code.sh
index 4e3767a657e..c1b60d1269f 100755
--- a/tools/distrib/yapf_code.sh
+++ b/tools/distrib/yapf_code.sh
@@ -35,4 +35,4 @@ python3 -m virtualenv $VIRTUALENV -p $(which python3)
 PYTHON=${VIRTUALENV}/bin/python
 "$PYTHON" -m pip install yapf==0.30.0
 
-$PYTHON -m yapf $ACTION --parallel --recursive --style=setup.cfg "${DIRS[@]}"
+$PYTHON -m yapf $ACTION --parallel --recursive --style=setup.cfg "${DIRS[@]}" -e "**/site-packages/**/*"