Firebase功能赢得'；无法在Github操作上部署

无法在Github操作上部署Next.Js app和firebase函数

name: Deploy to Firebase Hosting on merge
'on':
  push:
    branches:
      - main
jobs:
  deploy_hosting:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - run: npm ci && npm run build
      - uses: FirebaseExtended/action-hosting-deploy@v0
        with:
          repoToken: '${{ secrets.GITHUB_TOKEN }}'
          firebaseServiceAccount: '${{ secrets.... }}'
          channelId: live
          projectId: ....

Next.JS应用程序似乎构建得很好，但之后我出现以下错误：

./functions/src/index.ts:1:28
Type error: Cannot find module 'firebase-functions' or its corresponding type declarations.

> 1 | import * as functions from "firebase-functions";
    |                            ^
  2 | import * as admin from "firebase-admin";

它显然没有安装package.json中的依赖项，但我不明白为什么。npm ci&&npm build似乎同时安装和构建主应用程序和功能？如果不是，为什么它不先安装就试图构建功能？我不知道如何进行

我也将此添加到我的firebase.json中：

  "functions": {
"predeploy": [
  "npm --prefix ./functions/ install",
  "npm --prefix ./functions/ run build"
],
"source": "functions"

},