diff --git a/.github/workflows/workflow.yml b/.github/workflows/workflow.yml
index 37c104cb2..0894b82f2 100644
--- a/.github/workflows/workflow.yml
+++ b/.github/workflows/workflow.yml
@@ -98,17 +98,17 @@ jobs:
       - run: opam install lwt_ppx lwt_ppx_let --deps-only --with-test
         if: ${{ matrix.ppx == true }}
 
-      - run: dune build --only-packages lwt_react,lwt
+      - run: opam exec -- dune build --only-packages lwt_react,lwt
 
-      - run: dune build --only-packages lwt_ppx
+      - run: opam exec -- dune build --only-packages lwt_ppx
         if: ${{ matrix.ppx == true }}
 
-      - run: dune runtest --only-packages lwt_react,lwt
+      - run: opam exec -- dune runtest --only-packages lwt_react,lwt
 
-      - run: dune runtest --only-packages lwt_ppx
+      - run: opam exec -- dune runtest --only-packages lwt_ppx
         if: ${{ matrix.ppx == true }}
 
-      - run: make ppx_let-test
+      - run: opam exec -- make ppx_let-test
         if: ${{ matrix.ppx == true }}
 
   lint-opam: