un yapf protoc_lib_deps
diff --git a/tools/distrib/yapf_code.sh b/tools/distrib/yapf_code.sh
index 8196773..f096868 100755
--- a/tools/distrib/yapf_code.sh
+++ b/tools/distrib/yapf_code.sh
@@ -23,6 +23,7 @@
     'tools'
 )
 EXCLUSIONS=(
+    '*protoc_lib_deps.py'  # this file is auto-generated
 )
 
 VIRTUALENV=yapf_virtual_environment