diff --git a/doc/build_antora.sh b/doc/build_antora.sh
index 5fc4a429..cdac5326 100755
--- a/doc/build_antora.sh
+++ b/doc/build_antora.sh
@@ -7,3 +7,4 @@ cd "$SCRIPT_DIR"
 
 npm ci
 npx antora unordered-playbook.yml
+cp -f html/index.html html/unordered.html