That fails. The point of the goto in the original is that Exporter checks caller to figure out what package to export symbols to. You have to use export_to_level() instead, and my experience suggests that that function is more likely to cause warning messages to come from the wrong place than I like. (Also with 5.6+ it will force you to load Exporter::Heavy which is slower. If that matters to you.)

Aside from that, I don't like using explicit indexes if I can avoid it...