build cache fix (maybe)

.gitea/workflows/build.yml

@@ -41,6 +41,17 @@ jobs:
           echo "SCCACHE_DIR=/tmp/sccache" >> $GITHUB_ENV
           echo "RUSTC_WRAPPER=sccache" >> $GITHUB_ENV
 
+      - name: Cache dependencies
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: ${{ runner.os }}-${{ matrix.target }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-${{ matrix.target }}-cargo-
+
       - name: Setup cross-compilation tools
         if: matrix.setup_cmd != ''
         run: ${{ matrix.setup_cmd }}