From 8c4bb620a8159e45d9dce58b0edd9f6672fbf0a9 Mon Sep 17 00:00:00 2001
From: MiguelMadero <git@miguelmadero.com>
Date: Thu, 13 Apr 2017 16:10:41 -0700
Subject: [PATCH] Avoids using Array.prototype.includes since it is not
 avaialble in node 4. Fixes https://github.com/yarnpkg/yarn/issues/3138

---
 src/cli/commands/global.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/cli/commands/global.js b/src/cli/commands/global.js
index 99b80c0e5d..cffc322293 100644
--- a/src/cli/commands/global.js
+++ b/src/cli/commands/global.js
@@ -179,7 +179,7 @@ const {run, setFlags: _setFlags} = buildSubCommands('global', {
     await updateCwd(config);
 
     const updateBins = await initUpdateBins(config, reporter, flags);
-    if (args.includes('yarn')) {
+    if (args.indexOf('yarn') !== -1) {
       reporter.warn(reporter.lang('packageContainsYarnAsGlobal'));
     }