The script sorely needs a callback that can run after all the tasks have completed (since iconify-convert can take a long time to complete) . It would be referenced like so:

iconify({ }, function () { console.log("Processing is done! Yay!"); });

... so that extra processing, such as renaming .scss to .less (I'm considering opening an issue for LESS-support, by the way), can take place once the final files have actually been written. :-)