diff --git a/packages/react-scripts/scripts/build.js b/packages/react-scripts/scripts/build.js
index 7a3a635a5d3..f198b92ca95 100644
--- a/packages/react-scripts/scripts/build.js
+++ b/packages/react-scripts/scripts/build.js
@@ -53,9 +53,10 @@ if (!checkRequiredFiles([paths.appHtml, paths.appIndexJs])) {
 
 const argv = process.argv.slice(2);
 const writeStatsJson = argv.indexOf('--stats') !== -1;
+const productionMode = argv.indexOf('--dev') === -1;
 
 // Generate configuration
-const config = configFactory('production');
+const config = configFactory(productionMode ? 'production' : 'development');
 
 // We require that you explicitly set browsers and do not fall back to
 // browserslist defaults.