failed to run 'hotcoffee'

[luochen1990]

I'm using hotnode@0.0.8 with node@v4.0.0 and coffee-script@1.9.3 , when I typed hotcoffee src/startService.coffee I got these:

$ hotcoffee src/startService.coffee
    hotnode  coffee process restarted
events.js:141
      throw er; // Unhandled 'error' event
      ^

Error: spawn coffee ENOENT
    at exports._errnoException (util.js:837:11)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:178:32)
    at onErrorNT (internal/child_process.js:344:16)
    at doNTCallback2 (node.js:429:9)
    at process._tickCallback (node.js:343:17)
    at Function.Module.runMain (module.js:477:11)
    at startup (node.js:117:18)
    at node.js:951:3

I can't tell what happend via these error messages, please help, thx.

PS: when I typed coffee src/startService.coffee everything goes well, but when the 'hot' is added before 'coffee' under the same directory the error above is thrown.