diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
index db74430..1225fb3 100644
--- a/.github/workflows/c-cpp.yml
+++ b/.github/workflows/c-cpp.yml
@@ -12,9 +12,10 @@ jobs:
     runs-on: ubuntu-18.04
 
     steps:
+    - uses: actions/checkout@v2
     - name: install dependencies
       run: sudo apt-get install -y build-essential cmake libasio-dev
     - name: build
-      run: mkdir build && cd build && cmake .. && cmake --build . 
+      run: pwd && ls && mkdir build && cd build && cmake .. && cmake --build . 
     - name: pack
       run: cpack