diff --git a/src/Composer/Package/Archiver/ArchiveManager.php b/src/Composer/Package/Archiver/ArchiveManager.php
index 3025878d7eac..13dd7c7feba8 100644
--- a/src/Composer/Package/Archiver/ArchiveManager.php
+++ b/src/Composer/Package/Archiver/ArchiveManager.php
@@ -16,6 +16,7 @@
 use Composer\Package\RootPackageInterface;
 use Composer\Util\Filesystem;
 use Composer\Util\Loop;
+use Composer\Util\SyncHelper;
 use Composer\Json\JsonFile;
 use Composer\Package\CompletePackageInterface;
 
@@ -149,8 +150,9 @@ public function archive(CompletePackageInterface $package, $format, $targetDir,
             try {
                 // Download sources
                 $promise = $this->downloadManager->download($package, $sourcePath);
-                $this->loop->wait(array($promise));
-                $this->downloadManager->install($package, $sourcePath);
+                SyncHelper::await($this->loop, $promise);
+                $promise = $this->downloadManager->install($package, $sourcePath);
+                SyncHelper::await($this->loop, $promise);
             } catch (\Exception $e) {
                 $filesystem->removeDirectory($sourcePath);
                 throw  $e;