You may try first [https://github.com/ngtk3/nim-chess2](https://github.com/ngtk3/nim-chess2)
The readme contains the instructions, which I tested recently with Nim v 0.15.2 on Linux. For Linux you can copy the commands to a file and run the script, bash script.sh. I know that it does not work for OSX, can not help. Of course a nimble install would be more nice, but I can not provide that currently, and I think there are indeed no users.
