From 2fc4fadd7ce2b2617d7226f50e267c41cd091532 Mon Sep 17 00:00:00 2001
From: Yuri Kanivetsky <yuri.kanivetsky@gmail.com>
Date: Mon, 30 Jul 2018 12:00:57 +0300
Subject: [PATCH] Make yarn not to add /usr/bin to PATH if already there

---
 src/util/execute-lifecycle-script.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/util/execute-lifecycle-script.js b/src/util/execute-lifecycle-script.js
index adbb4624c5..f155d30d53 100644
--- a/src/util/execute-lifecycle-script.js
+++ b/src/util/execute-lifecycle-script.js
@@ -144,7 +144,10 @@ export async function makeEnv(
 
   // Include the directory that contains node so that we can guarantee that the scripts
   // will always run with the exact same Node release than the one use to run Yarn
-  pathParts.unshift(path.dirname(process.execPath));
+  const execBin = path.dirname(process.execPath);
+  if (pathParts.indexOf(execBin) === -1) {
+    pathParts.unshift(execBin);
+  }
 
   // Include node-gyp version that was bundled with the current Node.js version,
   // if available.