Julien Lepiller writes: > I don't think checking for file-exists before mkdir-p makes much sense. Doesn't mkdir-p make the same > checks already? You’re right — thank you! > I thought find-files required two arguments? Also the first argument > could be simplified to input-folder The second argument is #:optional. But yes, it should be input-folder — that was the whole point of the first let. Thank you! > Otherwise LGTM, but I can't push myself currently. Thanks! Here’s the updated patch: