There's something I find really off-putting about a tool that's going to be managing private keys having dependencies that point to the master branch of various third party git repositories.
It also unconditionally tries to listen on ports 80, 402, 443, 552 and 4402 whenever it completes a challenge, even if you have absolutely no intention of using any of these verification methods, so there's a lot of moving parts most of which you don't want.
I made a FreeBSD port, but thought twice about submitting it: https://github.com/Freaky/ports/tree/master/security/acmetoo...