npm and error messages

node_modules/math-random/node.js

@@ -0,0 +1,13 @@
+var crypto = require('crypto')
+var max = Math.pow(2, 32)
+
+module.exports = random
+module.exports.cryptographic = true
+
+function random () {
+  var buf = crypto
+    .randomBytes(4)
+    .toString('hex')
+
+  return parseInt(buf, 16) / max
+}