getconfig in RootAliasPackage

src/Composer/Package/RootAliasPackage.php

@@ -62,6 +62,14 @@ class RootAliasPackage extends AliasPackage implements RootPackageInterface
         return $this->aliasOf->getPreferStable();
     }
 
+    /**
+     * {@inheritDoc}
+     */
+    public function getConfig()
+    {
+        return $this->aliasOf->config;
+    }
+
     /**
      * {@inheritDoc}
      */