diff --git a/.github/workflows/build_matlab.yml b/.github/workflows/build_matlab.yml
index ac2d7a759..499c2b1d0 100644
--- a/.github/workflows/build_matlab.yml
+++ b/.github/workflows/build_matlab.yml
@@ -31,6 +31,8 @@ jobs:
     - name: run mex example
       run: |
         pwd
+        ls -l
+        ls -l build
         matlab -nodisplay -r 'try, example(), catch, exit(1); end; exit'