From fc4d5fc08d966c54e319c42e9acb9da89c0dd0df Mon Sep 17 00:00:00 2001
From: Rhys Arkins <rhys@arkins.net>
Date: Thu, 22 Mar 2018 20:35:25 +0100
Subject: [PATCH] fix: add check if lerna npmClient=yarn

---
 lib/manager/npm/monorepos.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/manager/npm/monorepos.js b/lib/manager/npm/monorepos.js
index 56e9c9ed8e..2913545687 100644
--- a/lib/manager/npm/monorepos.js
+++ b/lib/manager/npm/monorepos.js
@@ -65,7 +65,10 @@ async function checkMonorepos(config) {
   if (await platform.getFile('package-lock.json')) {
     logger.debug('lerna has a package-lock.json');
     lernaLockFile = 'npm';
-  } else if (await platform.getFile('yarn.lock')) {
+  } else if (
+    lernaJson.npmClient === 'yarn' &&
+    (await platform.getFile('yarn.lock'))
+  ) {
     logger.debug('lerna has non-workspaces yarn');
     lernaLockFile = 'yarn';
   }
-- 
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