diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ed0d5b47c9f80428312ad5f4db18dfd91a4d08c6..f97630da40925a093b6465702656ffe864e8be35 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -35,6 +35,7 @@ before_script:
 build_only:
   script:
     - cd slides
+    - ls -ltr
     - ./gen_index.sh
     - make
     - make deploy