diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6dbb43e15..8ab2221c7 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -65,10 +65,10 @@ jobs:
       uses: actions/cache@v2
       with:
         path: ~/.ccache
-        key: ccache-${{ matrix.os }}-gcc-${{ matrix.gcc }}-${{ github.repository_owner }}-${{ github.ref_name }}-${{ github.sha }}
+        key: ccache-v2-${{ matrix.os }}-gcc-${{ matrix.gcc }}-${{ github.repository_owner }}-${{ github.ref_name }}-${{ github.sha }}
         restore-keys: |
-          ccache-${{ matrix.os }}-gcc-${{ matrix.gcc }}-${{ github.repository_owner }}-${{ github.ref_name }}
-          ccache-${{ matrix.os }}-gcc-${{ matrix.gcc }}
+          ccache-v2-${{ matrix.os }}-gcc-${{ matrix.gcc }}-${{ github.repository_owner }}-${{ github.ref_name }}
+          ccache-v2-${{ matrix.os }}-gcc-${{ matrix.gcc }}
     - name: Download DF
       run: |
         sh ci/download-df.sh