yogi serve --watch throws an error

[ItsAsbreuk]

The error is:

events.js:72
        throw er; // Unhandled 'error' event
              ^
Error: spawn ENOENT
    at errnoException (child_process.js:980:11)
    at Process.ChildProcess._handle.onexit (child_process.js:771:34)

And prevents the server from starting up.
When I start the server without --watch and run shifter with localhost:5000/shifter all works fine, so I guess I did set up things well.

Marco