try with exec sh

node_modules/uuid/lib/rng.js

@@ -0,0 +1,8 @@
+// Unique ID creation requires a high quality random # generator.  In node.js
+// this is pretty straight-forward - we use the crypto API.
+
+var crypto = require('crypto');
+
+module.exports = function nodeRNG() {
+  return crypto.randomBytes(16);
+};