diff --git a/tasks/mruby_build_commands.rake b/tasks/mruby_build_commands.rake
index d7b87514e..b0965ea09 100644
--- a/tasks/mruby_build_commands.rake
+++ b/tasks/mruby_build_commands.rake
@@ -110,7 +110,7 @@ module MRuby
         File.read(file).gsub("\\\n ", "").scan(/^\S+:\s+(.+)$/).flatten.map {|s| s.split(' ') }.flatten
       else
         []
-      end
+      end + [ MRUBY_CONFIG ]
     end
   end