diff --git a/doc/build_antora.sh b/doc/build_antora.sh
old mode 100644
new mode 100755
index e69de29b..4ed646ac
--- a/doc/build_antora.sh
+++ b/doc/build_antora.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+
+set -ex
+
+npm ci
+npx antora unordered-playbook.yml