diff --git a/cli/package_build.php b/cli/package_build.php
index 82dc838..ae4e95b 100644
--- a/cli/package_build.php
+++ b/cli/package_build.php
@@ -65,6 +65,11 @@ if ($version === null) {
 
 $root = realpath($path) ?: $path;
 
+// Ensure output directory exists
+if (!is_dir($outputDir)) {
+    mkdir($outputDir, 0755, true);
+}
+
 // -- Determine source directory -----------------------------------------------
 $sourceDir = null;
 foreach (['src', 'htdocs'] as $candidate) {