diff --git a/.gitea/workflows/build-tutorial.yml b/.gitea/workflows/build-tutorial.yml
index 252069b..2d58898 100644
--- a/.gitea/workflows/build-tutorial.yml
+++ b/.gitea/workflows/build-tutorial.yml
@@ -12,9 +12,9 @@ on:
   workflow_dispatch:
 
 env:
-  # npmmirror 的 node 镜像只有 glibc 构建；Alpine(musl) 用 unofficial-builds 的 musl 版
-  NODE_DIST: https://unofficial-builds.nodejs.org/download/release
-  NODE_VERSION: v20.19.5
+  # musl 构建托管在自家 release 资产（tag ci-node-v20.19.5-musl）——runner 同机房拉取快；
+  # 原始来源 unofficial-builds（npmmirror 无 musl）
+  NODE_DIST: https://gitea.idealjs.com/attachments/07df24de-1408-4042-8db6-8a64848e2791
   YARN_NPM_REGISTRY_SERVER: https://registry.npmmirror.com
 
 jobs:
@@ -24,7 +24,7 @@ jobs:
     steps:
       - name: Install portable node (host 无 node，无 docker)
         run: |
-          wget -q "$NODE_DIST/$NODE_VERSION/node-$NODE_VERSION-linux-x64-musl.tar.xz" -O /tmp/node.tar.xz
+          wget -q "$NODE_DIST" -O /tmp/node.tar.xz
           mkdir -p "$RUNNER_TEMP/node"
           tar -xJf /tmp/node.tar.xz -C "$RUNNER_TEMP/node" --strip-components=1
           echo "$RUNNER_TEMP/node/bin" >> "$GITHUB_PATH"