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@mattdm @mcc Unfortunately `-n` doesn't seem to be race-free though :/

https://unix.stackexchange.com/questions/248544/mv-move-file-only-if-destination-does-not-exist/248547?noredirect=1#comment428238_248547

With that in mind (if still true), I don't see any worth in a `-n` flag (invoking the "it's not UNIX" meme here :D). Then again, while there are many very bad options added by the GNU project if you ask me (GNU/tar's --checkpoint-action flag springs to mind), but this'd be a really useful flag in principle.