diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index b088a34..84a3fd9 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -28,7 +28,7 @@ jobs:
       - run: opam install . --deps-only --with-test
       - run: opam install zanuda
       - run: opam install ounit2
-
+      - run: rm -rf _build
       - run: opam exec -- dune build @fmt @check @runtest -j3
       - run: opam exec -- dune runtest
       - run: opam exec -- zanuda -no-top_file_license -no-check-filesystem -dir .