diff --git a/.github/workflows/cpp_ci.yml b/.github/workflows/cpp_ci.yml
index cca33bc..1b6eacc 100644
--- a/.github/workflows/cpp_ci.yml
+++ b/.github/workflows/cpp_ci.yml
@@ -17,6 +17,8 @@ jobs:
       run: wget http://www.fftw.org/fftw-3.3.10.tar.gz && tar xzf fftw-3.3.10.tar.gz && cd fftw-3.3.10 && ./configure && make && sudo make install
     - name: load submodules
       run: git submodule update --init
+    - name: debug
+      run: ls
     - name: cmake
       run: mkdir build && export MKPATH="${PWD}" && cd build && echo "${MKPATH}" && cmake "${MKPATH}"
     - name: make