$ gulp
[19:07:02] Requiring external module babel-register
F:\Revise\es6\node_modules\babel-core\lib\transformation\file\options\option-manager.js:328
throw e;
^

Error: Couldn’t find preset “es2015” relative to directory "F:\Revise\es6"
at F:\Revise\es6\node_modules\babel-core\lib\transformation\file\options\option-manager.js:293:19
at Array.map ()
at OptionManager.resolvePresets (F:\Revise\es6\node_modules\babel-core\lib\transformation\file\options\option-manager.js:275:20)
at OptionManager.mergePresets (F:\Revise\es6\node_modules\babel-core\lib\transformation\file\options\option-manager.js:264:10)
at OptionManager.mergeOptions (F:\Revise\es6\node_modules\babel-core\lib\transformation\file\options\option-manager.js:249:14)
at OptionManager.init (F:\Revise\es6\node_modules\babel-core\lib\transformation\file\options\option-manager.js:368:12)
at compile (F:\Revise\es6\node_modules\babel-register\lib\node.js:103:45)
at loader (F:\Revise\es6\node_modules\babel-register\lib\node.js:144:14)
at Object.require.extensions.(anonymous function) [as .js] (F:\Revise\es6\node_modules\babel-register\lib\node.js:154:7)
at Module.load (internal/modules/cjs/loader.js:653:32)