diff --git a/src/ExtraPackage.php b/src/ExtraPackage.php
index 2471cb0..00be1e6 100644
--- a/src/ExtraPackage.php
+++ b/src/ExtraPackage.php
@@ -186,7 +186,7 @@ public function mergeInto(RootPackageInterface $root, PluginState $state)
 
         $this->mergeScripts($root, $state);
 
-        if ($state->isDevMode()) {
+        if ($state->shouldMergeDev()) {
             $this->mergeDevInto($root, $state);
         } else {
             $this->mergeReferences($root);