diff --git a/src/Composer/ComposerPackage.php b/src/Composer/ComposerPackage.php
index 14d1bc74..225d1296 100644
--- a/src/Composer/ComposerPackage.php
+++ b/src/Composer/ComposerPackage.php
@@ -69,7 +69,7 @@ public static function fromFile(string $absolutePath, array $overrideAutoload =
             $absolutePath = rtrim($absolutePath, DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR . 'composer.json';
         }
 
-        $composer = Factory::create(new NullIO(), $absolutePath);
+        $composer = Factory::create(new NullIO(), $absolutePath, true);
 
         return new ComposerPackage($composer, $overrideAutoload);
     }
@@ -83,7 +83,7 @@ public static function fromComposerJsonArray($jsonArray, array $overrideAutoload
     {
         $factory = new Factory();
         $io = new NullIO();
-        $composer = $factory->createComposer($io, $jsonArray);
+        $composer = $factory->createComposer($io, $jsonArray, true);
 
         return new ComposerPackage($composer, $overrideAutoload);
     }
diff --git a/src/Composer/ProjectComposerPackage.php b/src/Composer/ProjectComposerPackage.php
index 0cad859f..d432f167 100644
--- a/src/Composer/ProjectComposerPackage.php
+++ b/src/Composer/ProjectComposerPackage.php
@@ -26,7 +26,7 @@ public function __construct(string $absolutePath, array $overrideAutoload = null
         }
         unset($absolutePath);
 
-        $composer = Factory::create(new NullIO(), $absolutePathFile);
+        $composer = Factory::create(new NullIO(), $absolutePathFile, true);
 
         parent::__construct($composer, $overrideAutoload);