diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index b5bcd18..05c95eb 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -78,9 +78,11 @@ jobs:
 
       - name: install package
         run: |
+          mamba list
           python -m pip install -U pip
           python -m pip install -e .[dev]
           python setup.py build_ext --inplace  # required for C coverage
+          ls -la ilpy
         env:
           CYTHON_TRACE: 1 # enable coverage of cython code
           CFLAGS: "-coverage" # enable coverage of C code