diff --git a/.github/workflows/ccpp.yml b/.github/workflows/ccpp.yml
index d7f05d2..4c0e854 100644
--- a/.github/workflows/ccpp.yml
+++ b/.github/workflows/ccpp.yml
@@ -19,6 +19,7 @@ jobs:
         args: git submodule update --init
     - name: configure
       run: |
+        mkdir build
         cd build
         cmake ..
     - name: make