giving up if this doesn't work

.gitea/workflows/build.yml

@@ -9,8 +9,6 @@ jobs:
   build:
     name: Build ${{ matrix.target }}
     runs-on: ubuntu-latest
-
-    # A matrix lets us run the job twice in parallel: once for x86, once for arm.
     strategy:
       matrix:
         include:
@@ -23,21 +21,21 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      # Sets up Rust correctly and caches it
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
         with:
           targets: ${{ matrix.target }}
 
-      # Downloads pre-compiled `cross` binary instantly (saves ~3 mins vs cargo install)
       - name: Install cross
         if: matrix.use-cross == true
         uses: taiki-e/install-action@v2
         with:
           tool: cross
 
-      # Builds using cargo for x86, and cross for ARM
       - name: Build binary
+        env:
+          # This is the magic fix for 'act' and Docker-in-Docker
+          CROSS_CONTAINER_IN_CONTAINER: true
         run: |
           if [ "${{ matrix.use-cross }}" == "true" ]; then
             cross build --release --target ${{ matrix.target }}
@@ -45,7 +43,6 @@ jobs:
             cargo build --release --target ${{ matrix.target }}
           fi
 
-      # Uploads the artifact. They will be separated by target name.
       - name: Upload artifacts
         uses: actions/upload-artifact@v4
         with: