diff --git a/.github/workflows/main-stock-ubuntu.yml b/.github/workflows/main-stock-ubuntu.yml
index e9e6b263..7a92e3a9 100644
--- a/.github/workflows/main-stock-ubuntu.yml
+++ b/.github/workflows/main-stock-ubuntu.yml
@@ -53,6 +53,10 @@ jobs:
 
           # this should be sufficient for find_package(Catch2) to work
 
+      - name: list /usr/lib
+        run: |
+          ls /usr/lib
+
       - name: bootstrap xo-cmake
         run: |
           PREFIX=${{github.workspace}}/local