From f26ed0f09a71e451e2b3b0cae22d30918f6a8bc1 Mon Sep 17 00:00:00 2001
From: Alex Brazier <aejbrazier.apps@gmail.com>
Date: Mon, 18 Jun 2018 17:06:26 +0100
Subject: [PATCH] Use yarn in predeploy script if built using yarn (#4623)

---
 packages/react-dev-utils/printHostingInstructions.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/react-dev-utils/printHostingInstructions.js b/packages/react-dev-utils/printHostingInstructions.js
index 7afb4af21e4..df697392fe6 100644
--- a/packages/react-dev-utils/printHostingInstructions.js
+++ b/packages/react-dev-utils/printHostingInstructions.js
@@ -92,7 +92,7 @@ function printDeployInstructions(publicUrl, hasDeployScript, useYarn) {
     console.log(`      ${chalk.dim('// ...')}`);
     console.log(
       `      ${chalk.yellow('"predeploy"')}: ${chalk.yellow(
-        '"npm run build",'
+        `"${useYarn ? 'yarn' : 'npm run'} build",`
       )}`
     );
     console.log(