diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 3e384ba..791f454 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -16,7 +16,10 @@ jobs:
         with:
           nix_path: nixpkgs=channel:nixos-unstable
       - name: debug
-        run: pwd && tree
+        run: |
+          pwd
+          file /home/runner/work/pg_bzip/pg_bzip/test/samples/all_movies.csv
+          tree
       - name: Run tests
         run: nix-shell --run "with-pg-${{ matrix.pg-version }} make installcheck"
       - if: ${{ failure() }}