diff --git a/lib/index.js b/lib/index.js
index 70a76888cf4..07d1ca5c3a5 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -9,8 +9,6 @@ const buildDebugMacroPlugin = require('./build-debug-macro-plugin');
 const buildStripClassCallcheckPlugin = require('./build-strip-class-callcheck-plugin');
 const injectBabelHelpers = require('./transforms/inject-babel-helpers');
 
-const isProduction = process.env.EMBER_ENV === 'production';
-
 const PRE_BUILT_TARGETS = [
   'last 1 Chrome versions',
   'last 1 Firefox versions',
@@ -171,6 +169,8 @@ module.exports = {
     let ember;
     let targets = (this.project && this.project.targets && this.project.targets.browsers) || [];
 
+    const isProduction = process.env.EMBER_ENV === 'production';
+
     if (
       !isProduction &&
       (PRE_BUILT_TARGETS.every(target => targets.includes(target)) &&