diff --git a/Makefile b/Makefile
index 6565dcb..9203234 100644
--- a/Makefile
+++ b/Makefile
@@ -145,7 +145,7 @@ documentation: documentation-osarch-specific
 # -----------------------------------------------------------------------------
 
 .PHONY: clean
-clean: clean-csharp clean-go clean-java clean-php clean-python clean-ruby
+clean: clean-csharp clean-go clean-java clean-php clean-python clean-ruby clean-osarch-specific
 
 
 .PHONY: clean-csharp
@@ -155,7 +155,7 @@ clean-csharp:
 
 .PHONY: clean-go
 clean-go:
-	@rm -rf $(MAKEFILE_DIRECTORY)go/szconfig || true
+	rm -rf $(MAKEFILE_DIRECTORY)go/szconfig || true
 	@rm -rf $(MAKEFILE_DIRECTORY)go/szconfigmgr || true
 	@rm -rf $(MAKEFILE_DIRECTORY)go/szdiagnostic || true
 	@rm -rf $(MAKEFILE_DIRECTORY)go/szengine || true
diff --git a/doc.go b/doc.go
new file mode 100644
index 0000000..0b4a5d1
--- /dev/null
+++ b/doc.go
@@ -0,0 +1,4 @@
+/*
+Module sz-sdk-proto is generated from szconfig.proto.
+*/
+package main
diff --git a/go/doc.go b/go/doc.go
deleted file mode 100644
index 117f397..0000000
--- a/go/doc.go
+++ /dev/null
@@ -1,4 +0,0 @@
-/*
-Module sz-sdk-proto is code generated by protoc.
-*/
-package main
diff --git a/go/szconfig/doc.go b/go/szconfig/doc.go
index bd0b537..7a4c3cc 100644
--- a/go/szconfig/doc.go
+++ b/go/szconfig/doc.go
@@ -1,4 +1,4 @@
 /*
-Package szconfig...
+Package szconfig is generated from szconfig.proto.
 */
 package szconfig
diff --git a/go/szconfigmanager/doc.go b/go/szconfigmanager/doc.go
index 0b06a89..16c1dce 100644
--- a/go/szconfigmanager/doc.go
+++ b/go/szconfigmanager/doc.go
@@ -1,4 +1,4 @@
 /*
-Package szconfigmanager...
+Package szconfigmanager is generated from szconfigmanager.proto.
 */
 package szconfigmanager
diff --git a/go/szdiagnostic/doc.go b/go/szdiagnostic/doc.go
index 3b905a7..b671272 100644
--- a/go/szdiagnostic/doc.go
+++ b/go/szdiagnostic/doc.go
@@ -1,4 +1,4 @@
 /*
-Package szdiagnostic...
+Package szdiagnostic is generated from szdiagnostic.proto.
 */
 package szdiagnostic
diff --git a/go/szengine/doc.go b/go/szengine/doc.go
index a31b857..28d1040 100644
--- a/go/szengine/doc.go
+++ b/go/szengine/doc.go
@@ -1,4 +1,4 @@
 /*
-Package szengine...
+Package szengine is generated from szengine.proto.
 */
 package szengine
diff --git a/go/szproduct/doc.go b/go/szproduct/doc.go
index 2d3831e..9fb927f 100644
--- a/go/szproduct/doc.go
+++ b/go/szproduct/doc.go
@@ -1,4 +1,4 @@
 /*
-Package szproduct...
+Package szproduct is generated from szproduct.proto.
 */
 package szproduct