npm init
npm install --save-dev gulp coffee-script
$ cat gulpfile.coffee
gulp = require 'gulp'
gulp.task 'default', ->
$ gulp
[10:53:36] Requiring external module coffee-script/register
[10:53:36] Using gulpfile ~/codes/gulp-sample/gulpfile.coffee
[10:53:36] Starting 'default'...
[10:53:36] Finished 'default' after 76 μs