diff --git a/.github/workflows/cache.yml b/.github/workflows/cache.yml
index 61d5ac0..7614522 100644
--- a/.github/workflows/cache.yml
+++ b/.github/workflows/cache.yml
@@ -27,8 +27,7 @@ jobs:
       - name: Update Homebrew
         run: |
           brew update --preinstall
-          ls -l  "$(brew --repository)/Library"
-          cat "" > .github/brew-formulae
+          echo "${{ hashFiles ($(brew --repository)) }}" > .github/brew-formulae
       - name: Configure Homebrew cache
         uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2 # 4.0
         with: