diff --git a/setup/cli/modules/unpack.php b/setup/cli/modules/unpack.php
index 3c66703ef90e0f63d23b2e10aa26e84f6948a35a..318ac1d7d0ec4991a954c1173384d2237a744836 100644
--- a/setup/cli/modules/unpack.php
+++ b/setup/cli/modules/unpack.php
@@ -144,7 +144,7 @@ class Unpacker extends Module {
     }
 
     function run($args, $options) {
-        $this->destination = $this->getArgument('install-path');
+        $this->destination = $args['install-path'];
         if (!is_dir($this->destination))
             if (!mkdir($this->destination, 0751, true))
                 die("Destination path does not exist and cannot be created");