diff --git a/cmd_pkg.go b/cmd_pkg.go
index c0d6cba..0f58480 100644
--- a/cmd_pkg.go
+++ b/cmd_pkg.go
@@ -167,7 +167,7 @@ func buildPkgRecurse(odir, path, rootpath string, exmap map[string]struct{}, bui
 	drs := Dirs(dir)
 	for _, dr := range drs {
 		_, ex := exmap[dr]
-		if ex || dr[0] == '.' || dr[0] == '_' {
+		if ex || dr[0] == '.' || dr[0] == '_' || dr == "internal" {
 			continue
 		}
 		sp := filepath.Join(path, dr)