git: Build snaps in destructive mode

.github/workflows/build.yml

@@ -1089,6 +1089,9 @@ jobs:
       id-token: write
       attestations: write
 
+    env:
+      CCACHE_DIR:      "${{ github.workspace }}/.ccache"
+
     steps:
       - name: ⬇️ Install setup dependencies
         run: |
@@ -1119,7 +1122,7 @@ jobs:
         uses: snapcore/action-build@v1
         id: snapcraft
         with:
-          snapcraft-args: --mounts ccache="${{ github.workspace }}/.ccache"
+          snapcraft-args: --destructive-mode
 
       - name: 🗝️ Generate build provenance attestations
         uses: actions/attest-build-provenance@v2

dist/snap/snapcraft.yaml

@@ -37,7 +37,6 @@ parts:
     build-environment:
       - CC: /usr/bin/gcc-14
       - CXX: /usr/bin/g++-14
-      - CCACHE_DIR: "$CRAFT_PROJECT_DIR/../ccache"
     cmake-parameters:
       - -DCMAKE_BUILD_TYPE=Release
       - -DCMAKE_C_COMPILER_LAUNCHER=/usr/bin/ccache