diff -Naur grpc-1.37.0-original/tools/distrib/python/grpcio_tools/grpc_tools/protoc.py grpc-1.37.0/tools/distrib/python/grpcio_tools/grpc_tools/protoc.py
--- grpc-1.37.0-original/tools/distrib/python/grpcio_tools/grpc_tools/protoc.py	2021-04-06 18:48:56.000000000 -0400
+++ grpc-1.37.0/tools/distrib/python/grpcio_tools/grpc_tools/protoc.py	2021-04-22 15:45:59.234743676 -0400
@@ -42,6 +42,7 @@
 if sys.version_info >= (3, 5, 0):
     import contextlib
     import importlib
+    import importlib.abc
     import importlib.machinery
     import threading