Update build.sh

Author: mayeut

build.sh

@@ -95,16 +95,17 @@ elif [ "${MANYLINUX_BUILD_FRONTEND}" == "podman" ]; then
 	TEST_COMMAND="podman"
 	podman build "${BUILD_ARGS_COMMON[@]}"
 elif [ "${MANYLINUX_BUILD_FRONTEND}" == "docker-buildx" ]; then
-	USE_LOCAL_CACHE=1
-	CACHE_STORE=("--cache-to=type=local,dest=$(pwd)/.buildx-cache-staging-${POLICY}_${PLATFORM},mode=max,compression=zstd,compression-level=22,force-compression=true")
 	if [ "${GITHUB_REPOSITORY:-}_${GITHUB_EVENT_NAME:-}_${GITHUB_REF:-}" == "pypa/manylinux_push_refs/heads/ghcr-cache" ]; then
-		CACHE_STORE+=("--cache-to=type=registry,ref=ghcr.io/pypa/manylinux-cache:${POLICY}_${PLATFORM}_main,mode=max,compression=zstd,compression-level=22,force-compression=true")
+		CACHE_STORE="--cache-to=type=registry,ref=ghcr.io/pypa/manylinux-cache:${POLICY}_${PLATFORM}_main,mode=max,compression=zstd,compression-level=22,force-compression=true"
+	else
+		USE_LOCAL_CACHE=1
+		CACHE_STORE="--cache-to=type=local,dest=$(pwd)/.buildx-cache-staging-${POLICY}_${PLATFORM},mode=max,compression=zstd,compression-level=22,force-compression=true"
 	fi
 	docker buildx build \
 		--load \
 		"--cache-from=type=registry,ref=ghcr.io/pypa/manylinux-cache:${POLICY}_${PLATFORM}_main" \
 		"--cache-from=type=local,src=$(pwd)/.buildx-cache-${POLICY}_${PLATFORM}" \
-		"${CACHE_STORE[@]}" \
+		"${CACHE_STORE}" \
 		"${BUILD_ARGS_COMMON[@]}"
 else
 	echo "Unsupported build frontend: '${MANYLINUX_BUILD_FRONTEND}'"