diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 7493d48..92fdc10 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -33,14 +33,14 @@ jobs:
     - name: Clingo version
       id: clingo-version
       run: |
-        python -c "import clingo; print(clingo.__version__)" >> $GITHUB_OUTPUT
+        CLINGO_VERSION=$(python -c "import clingo; print(clingo.__version__)") >> $$GITHUB_ENV
 
     - name: Cache nox
       id: cache-nox
       uses: actions/cache@v3
       with:
         path: .nox
-        key: ${{ runner.os }}-python-${{ matrix.python-version }}-clingo-$GITHUB_OUTPUT-nox
+        key: ${{ runner.os }}-python-${{ matrix.python-version }}-clingo-${{ env.CLINGO_VERSION }} -nox
 
     - name: Info
       run: |