diff --git a/action.yml b/action.yml
index 41f8e8c..c746aee 100644
--- a/action.yml
+++ b/action.yml
@@ -129,8 +129,6 @@ runs:
       shell: bash
       working-directory: ${{ inputs.working-directory }}
       run: |
-        resolver_nightly=
-
         echo "stack-build-arguments-build=       ${{ inputs.stack-build-arguments }} ${{ inputs.stack-build-arguments-build        }}" >>"$GITHUB_OUTPUT"
         echo "stack-build-arguments-dependencies=${{ inputs.stack-build-arguments }} ${{ inputs.stack-build-arguments-dependencies }}" >>"$GITHUB_OUTPUT"
         echo "stack-build-arguments-test=        ${{ inputs.stack-build-arguments }} ${{ inputs.stack-build-arguments-test         }}" >>"$GITHUB_OUTPUT"
@@ -141,6 +139,8 @@ runs:
         EOM
         }
 
+        resolver_nightly=
+
         if ! has_resolver && [[ "${{ inputs.stack-yaml }}" == 'stack-nightly.yaml' ]]; then
           resolver_nightly='--resolver nightly'
         fi