diff --git a/local-cli/util/yarn.js b/local-cli/util/yarn.js
index 6815353a84e4ad..86b0d3f5b354a6 100644
--- a/local-cli/util/yarn.js
+++ b/local-cli/util/yarn.js
@@ -8,6 +8,7 @@
  */
 'use strict';
 
+const execSync = require('child_process').execSync;
 const fs = require('fs');
 const path = require('path');
 const semver = require('semver');