docs: function(cb) {
              fs.exists(path.join(potterHome, 'package.json'), function(exists) {
                  if(exists) {
                      cb(null);
                  } else {
                      var packagejson = '{"dependencies":{}}';
                      fs.writeFile(path.join(potterHome, 'package.json'), packagejson, cb);
                  }
              });
          }