The npm install voiceplay may fail with "invalid active developer path..." and "missing xcrun" if xcode commandline tools are not installed. Just run xcode-select --install
Failed with npm ERR! mdns@2.2.8 install: node-gyp rebuild
Looks like someone else already took care of updating the mdns version: https://github.com/jcalvert/voiceplay
The npm install voiceplay may fail with "invalid active developer path..." and "missing xcrun" if xcode commandline tools are not installed. Just run
xcode-select --install