diff --git a/generator/main.go b/generator/main.go
index c198192..2a22277 100644
--- a/generator/main.go
+++ b/generator/main.go
@@ -75,7 +75,11 @@ func extractFile(file string, dirname string) (err error) {
 			prefix = header.Name
 			continue
 		}
-		filename := path.Join(dirname, strings.TrimPrefix(header.Name, prefix))
+		realname := strings.TrimPrefix(header.Name, prefix)
+		if strings.HasPrefix(realname, "generator") {
+			continue
+		}
+		filename := path.Join(dirname, realname)
 		if header.Typeflag == tar.TypeDir {
 			if err = os.MkdirAll(filename, 0755); err != nil {
 				return