diff --git a/composer.json b/composer.json
index f2dabac..02df3e4 100644
--- a/composer.json
+++ b/composer.json
@@ -41,7 +41,7 @@
         "baseline"
     ],
     "scripts": {
-        "build": "tools/box.phar compile --config=scripts/box/config.json",
+        "build": "php scripts/box/prepare-config.php && tools/box.phar compile --config=scripts/box/config.json",
         "cs-check": "@cs-fixer-check",
         "cs-fix": "@cs-fixer-fix",
         "cs-fixer-check": "vendor/bin/php-cs-fixer fix --dry-run",
diff --git a/scripts/box/prepare-config.php b/scripts/box/prepare-config.php
new file mode 100644
index 0000000..8889f56
--- /dev/null
+++ b/scripts/box/prepare-config.php
@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the box project.
+ *
+ * (c) Anatoliy Melnikov <5785276@gmail.com>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+$configPath = __DIR__ . '/config.json';
+$config = json_decode(file_get_contents($configPath), true, 512, \JSON_THROW_ON_ERROR);
+
+$config['base-path'] = dirname($configPath, 2);
+
+file_put_contents($config, json_encode($config, \JSON_THROW_ON_ERROR));