diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3ca1749..f3c01c2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -31,6 +31,7 @@ jobs:
         run: spack install --no-check-signature esmf@8.4%gcc@13
 
       - name: Configure
+        shell: spack-bash {0}
         run: |
           spack load esmf@8.4%gcc@13