Unable to install angular-devkit/build-angular in Angular 20

Discussão em 'Angular' iniciado por udeleng, Agosto 29, 2025.

  1. udeleng

    udeleng Guest

    I'm getting the following error when I run: npm install --save-dev @angular-devkit/build-angular. I'm not quire sure which version of build-angular I need.

    These are my dependencies:

    "dependencies": {
    "@angular/common": "^20.2.0",
    "@angular/compiler": "^20.2.0",
    "@angular/core": "^20.2.0",
    "@angular/forms": "^20.2.0",
    "@angular/platform-browser": "^20.2.0",
    "@angular/router": "^20.2.0",
    "rxjs": "~7.8.0",
    "tslib": "^2.3.0",
    "zone.js": "~0.15.0"
    },
    "devDependencies": {
    "@angular/build": "^20.2.1",
    "@angular/cli": "^20.2.1",
    "@angular/compiler-cli": "^20.2.0",
    "@types/jasmine": "~5.1.0",
    "jasmine-core": "~5.9.0",
    "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": "~5.9.2"
    }


    =================================

    npm error code ERESOLVE
    npm error ERESOLVE could not resolve
    npm error
    npm error While resolving: ng-webapp@0.0.0
    npm error Found: @angular/compiler@20.2.2
    npm error node_modules/@angular/compiler
    npm error peer @angular/compiler@"^20.0.0" from @angular/build@20.2.1
    npm error node_modules/@angular/build
    npm error dev @angular/build@"^20.2.1" from the root project
    npm error peer @angular/compiler@"20.2.2" from @angular/compiler-cli@20.2.2
    npm error node_modules/@angular/compiler-cli
    npm error peer @angular/compiler-cli@"^20.0.0" from @angular/build@20.2.1
    npm error node_modules/@angular/build
    npm error dev @angular/build@"^20.2.1" from the root project
    npm error dev @angular/compiler-cli@"^20.2.0" from the root project
    npm error 2 more (@angular/core, the root project)
    npm error
    npm error Could not resolve dependency:
    npm error dev @angular-devkit/build-angular@"20.2.0" from the root project
    npm error
    npm error Conflicting peer dependency: @angular/compiler@20.2.3
    npm error node_modules/@angular/compiler
    npm error peer @angular/compiler@"20.2.3" from @angular/compiler-cli@20.2.3
    npm error node_modules/@angular/compiler-cli
    npm error dev @angular/compiler-cli@"^20.2.0" from the root project
    npm error peer @angular/compiler-cli@"^20.0.0" from @angular-devkit/build-angular@20.2.0
    npm error node_modules/@angular-devkit/build-angular
    npm error dev @angular-devkit/build-angular@"20.2.0" from the root project
    npm error 2 more (@angular/localize, ng-packagr)


    ======================================

    This is what I get from npm info command:

    {
    jest: '^29.5.0',
    karma: '^6.3.0',
    'ng-packagr': '^20.0.0',
    protractor: '^7.0.0',
    typescript: '>=5.8 <6.0',
    tailwindcss: '^2.0.0 || ^3.0.0 || ^4.0.0',
    '@angular/ssr': '^20.2.1',
    'browser-sync': '^3.0.2',
    '@angular/core': '^20.0.0',
    '@web/test-runner': '^0.20.0',
    '@angular/localize': '^20.0.0',
    '@angular/compiler-cli': '^20.0.0',
    'jest-environment-jsdom': '^29.5.0',
    '@angular/service-worker': '^20.0.0',
    '@angular/platform-server': '^20.0.0',
    '@angular/platform-browser': '^20.0.0'
    }

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