diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f0282ff..b55e0ab 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -116,8 +116,7 @@ jobs:
         with:
           path: |
             ~/.stack
-          key: ${{ runner.os }}-${{ matrix.ghc }}-stack
-
+          key: ${{ runner.os }}-${{ steps.setup.outputs.ghc-version }}-stack
 
       - name: Install dependencies
         run: |