diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 588d17112..076f15a88 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -95,13 +95,15 @@ jobs:
       - run: opam install conf-pkg-config
         if: runner.os == 'Windows'
 
-      - run: opam pin --with-version `cat VERSION` . --best-effort
+      - run: opam pin --with-version $(cat VERSION) . --best-effort
         if: ${{ matrix.skip-test }}
+        shell: bash
 
       - run: |
-          opam pin --with-version `cat VERSION` .
+          opam pin --with-version $(cat VERSION) . -n
           opam install . --deps-only --with-test
         if: ${{ !matrix.skip-test }}
+        shell: bash
 
       - run: opam exec -- make all
         if: ${{ !matrix.skip-test }}