diff --git a/.github/actions/initial_setup/action.yml b/.github/actions/initial_setup/action.yml
index 03163f1..2984b64 100644
--- a/.github/actions/initial_setup/action.yml
+++ b/.github/actions/initial_setup/action.yml
@@ -34,7 +34,11 @@ runs:
               CACHE_NUMBER: 0
           with:
               path: ${{ env.CONDA }}/envs
-              key: conda-${{ inputs.conda_env }}-${{ hashFiles('tests/conda-envs/' + inputs.conda_env + '.yaml') }}-${{ steps.get-date.outputs.today }}-${{ env.CACHE_NUMBER }}
+              key: >-
+                  conda-${{ inputs.conda_env }}-
+                  ${{ hashFiles(format('tests/conda-envs/{0}.yaml', inputs.conda_env)) }}-
+                  ${{ steps.get-date.outputs.today }}-
+                  ${{ env.CACHE_NUMBER }}
 
         - name: Update conda env
           if: steps.conda-cache.outputs.cache-hit != 'true'