首次执行ng serve启动Angular项目时出现依赖包缺失报错

执行ng serve启动Angular项目时，抛出以下错误：

Error: Could not find the '@angular-devkit/build-angular:dev-server' builder's node package

用户提供的package.json配置如下：

{
  "name": "school-mgt",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "watch": "ng build --watch --configuration development",
    "test": "ng test"
  },
  "private": true,
  "dependencies": {
    "@angular/cdk": "^19.2.15",
    "@angular/common": "^19.2.0",
    "@angular/compiler": "^19.2.0",
    "@angular/core": "^19.2.0",
    "@angular/forms": "^19.2.0",
    "@angular/material": "^19.2.15",
    "@angular/platform-browser": "^19.2.0",
    "@angular/platform-browser-dynamic": "^19.2.0",
    "@angular/router": "^19.2.0",
    "rxjs": "~7.8.0",
    "tslib": "^2.3.0",
    "zone.js": "~0.15.0"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "^19.2.11",
    "@angular/cli": "^19.2.11",
    "@angular/compiler-cli": "^19.2.0",
    "@types/jasmine": "~5.1.0",
    "jasmine-core": "~5.6.0",
    "karma": "~6.4.0",
    "karma-chrome-launcher": "~3.2.0",
    "karma-coverage": "~2.2.0",
    "karma-jasmine": "~5.1.0",
    "karma-jasmine-html-reporter": "~2.1.0",
    "typescript": "~5.6"
  }
}

解决方案 #

1. 清理依赖并重新安装 #

这是最常见的修复方式，解决依赖安装不完整或缓存问题：

• 删除本地依赖文件夹和锁文件：

  rm -rf node_modules package-lock.json
  

• 重新安装所有依赖：

  npm install
  

2. 确保@angular-devkit/build-angular安装正确 #

如果重新安装后问题依旧，可手动指定版本安装该依赖：

npm install @angular-devkit/build-angular@19.2.11 --save-dev

3. 检查CLI版本一致性 #

全局Angular CLI版本与本地项目版本不匹配也可能导致该问题：

• 查看当前全局和本地CLI版本：

  ng --version
  

• 如果版本差异较大，更新全局CLI到项目对应版本：

  npm install -g @angular/cli@19.2.11
  

4. 验证angular.json配置 #

确认项目根目录下的angular.json中，serve命令的builder配置正确：

"architect": {
  "serve": {
    "builder": "@angular-devkit/build-angular:dev-server",
    "options": {
      "browserTarget": "school-mgt:build"
    }
  }
}

内容的提问来源于stack exchange，提问作者Jitesh Boliya