Try changing $GITHUB_WORKSPACE to ${{ github.workspace }}

Author: gilzoide

.github/workflows/build.yml

@@ -28,13 +28,13 @@ jobs:
       - name: CCache
         uses: actions/cache@v4
         with:
-          path: $GITHUB_WORKSPACE/.ccache
+          path: ${{ github.workspace }}/.ccache
           key: ${{ matrix.platform }}
       - name: Build artifact
         run: |
           make ${{ matrix.platform }}
         env:
-          CCACHE_DIR: $GITHUB_WORKSPACE/.ccache
+          CCACHE_DIR: ${{ github.workspace }}/.ccache
           CMAKE_CXX_COMPILER_LAUNCHER: ccache
       - name: Upload artifact
         uses: actions/upload-artifact@v4
@@ -60,13 +60,13 @@ jobs:
       - name: CCache
         uses: actions/cache@v4
         with:
-          path: $GITHUB_WORKSPACE/.ccache
+          path: ${{ github.workspace }}/.ccache
           key: ${{ matrix.platform }}
       - name: Build artifact
         run: |
           make ${{ matrix.platform }}
         env:
-          CCACHE_DIR: $GITHUB_WORKSPACE/.ccache
+          CCACHE_DIR: ${{ github.workspace }}/.ccache
           CMAKE_CXX_COMPILER_LAUNCHER: ccache
       - name: Upload artifact
         uses: actions/upload-artifact@v4