In all native modules, require should be called.

lib/module.js

@@ -20,11 +20,11 @@
 // USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 var NativeModule = require('native_module');
-var util = NativeModule.require('util');
+var util = require('util');
 var runInThisContext = require('vm').runInThisContext;
 var runInNewContext = require('vm').runInNewContext;
 var assert = require('assert').ok;
-var fs = NativeModule.require('fs');
+var fs = require('fs');
 
 
 // If obj.hasOwnProperty has been overridden, then calling
@@ -61,7 +61,7 @@ Module.globalPaths = [];
 Module.wrapper = NativeModule.wrapper;
 Module.wrap = NativeModule.wrap;
 
-var path = NativeModule.require('path');
+var path = require('path');
 
 Module._debug = util.debuglog('module');