[Test] Try to fix the problem on storing ccache results

.github/workflows/build.yml

@@ -18,7 +18,7 @@ env:
 
 # Multiple job to tests
 jobs:
-  # Test the compilation
+  # Test the compilation compatibility
   build:
     name: ${{ matrix.config.name }}
     runs-on: ${{ matrix.config.os }}
@@ -57,19 +57,20 @@ jobs:
         run: |
           string(TIMESTAMP current_date "%Y-%m-%d-%H;%M;%S" UTC)
           message("::set-output name=timestamp::${current_date}")
-      
-      - name: ccache cache files
-        uses: actions/cache@v1.1.0
-        with:
-          path: .ccache
-          key: ${{ matrix.config.name }}-ccache-${{ steps.ccache_cache_timestamp.outputs.timestamp }}
-          restore-keys: |
-            ${{ matrix.config.name }}-ccache-
 
       - name: Create CMake build environment
         # Some projects don't allow in-source building, so create a separate build directory
         # We'll use this as our working directory for all subsequent commands
         run: cmake -E make_directory ${{runner.workspace}}/build
+      
+      - name: ccache cache files
+        uses: actions/cache@v1.1.0
+        working-directory: ${{runner.workspace}}/build
+        with:
+          path: .ccache
+          key: ${{ matrix.config.name }}-ccache-${{ steps.ccache_cache_timestamp.outputs.timestamp }}
+          restore-keys: |
+            ${{ matrix.config.name }}-ccache-
 
       - name: Configure CMake
         # Use a bash shell so we can use the same syntax for environment variable