diff --git a/examples/multipro/pb/readme.md b/examples/multipro/pb/readme.md
new file mode 100644
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+++ b/examples/multipro/pb/readme.md
@@ -0,0 +1,4 @@
+# building p2p.pb.go:
+protoc --gogo_out=. --proto_path=../../../../../../:/usr/local/opt/protobuf/include:. *.proto
+
+