diff --git a/src/Composer/Factory.php b/src/Composer/Factory.php
index d364ae4af..f30609ca7 100644
--- a/src/Composer/Factory.php
+++ b/src/Composer/Factory.php
@@ -66,7 +66,7 @@ class Factory
         $binDir = getenv('COMPOSER_BIN_DIR') ?: $packageConfig['config']['bin-dir'];
 
         // initialize repository manager
-        $rm = $this->createRepositoryManager();
+        $rm = $this->createRepositoryManager($vendorDir);
 
         // initialize download manager
         $dm = $this->createDownloadManager();