diff --git a/.github/workflows/example.yml b/.github/workflows/example.yml
index c35c56a..e2761b3 100644
--- a/.github/workflows/example.yml
+++ b/.github/workflows/example.yml
@@ -22,7 +22,7 @@ jobs:
           - macOS-latest
           - windows-latest
 
-        include:
+        stack:
           - resolver: nightly
             ghc: "9.8.1"
           - resolver: lts-22.7
@@ -48,8 +48,8 @@ jobs:
         uses: ./
         with:
           working-directory: example
-          stack-arguments: --resolver ${{ matrix.resolver }}
-          cache-prefix: ${{ matrix.resolver }}/
+          stack-arguments: --resolver ${{ matrix.stack.resolver }}
+          cache-prefix: ${{ matrix.stack.resolver }}/
 
       - shell: bash
         run: |