docs: function(done) {
                  var source = __dirname + '/manifest.json';
                  var dest = self.dir + '/manifest.json';
  
                  fs.readFile(source, function(err, manifest) {
                      if (err) return done(err);
  
                      manifest = JSON.parse(manifest);
                      manifest.permissions.push.apply(manifest.permissions, settings.permissions);
  
                      fs.writeFile(dest, JSON.stringify(manifest, null, '\t'), done);
                  });
              }