Very good point! Thanks for catching that.
It would be harder in the long run if Lambda decides to support more languages than JS, as the parsing would have to be done on a per-language basis. But anyway, I have created an issue for it. In the meantime you can still use lfm with single files, but you will have to provide all the config via the command line (on the plus side, lfm has shorter CLI options and you get zipping for free!).
