It builds fine for me just now on 10.10. I did have to pop in to zsh instead of fish because of `SyntaxError: Missing parentheses in call to 'print'` though. The font rendering looks a bit off for me but it's blazingly fast.
I was having trouble building the neovim package, but I did not realize that I did not have the latest command-line tools. Updating those fixed the issue.
https://www.youtube.com/watch?v=lH_zb7X6mZw