Heroku不能构buildAngular2应用程序

我使用angular-cli创build了angular2应用程序。 接下来我想构build它并部署到heroku，所以我更新了package.json文件中的脚本部分：

 "scripts": { "heroku-prebuild": "npm install angular-cli@1.0.0-beta.17", "postinstall": "./node_modules/.bin/ng build --dev" } 

当我在本地机器上运行npm install ，应用程序的构build没有错误。 当我使用bitbucketpipe道运行它时也是如此，但是当我尝试将其部署到heroku构build失败时。

这是消息的一部分：

  0ms additional asset processing 1922ms chunk asset optimization 94% asset optimizationError in bail mode: [default] /tmp/build_c10a47380f869e4f82169d259a47dab7/src/app/app.component.ts:5:12 remote: Cannot find name 'require'. remote: remote: npm ERR! Linux 3.13.0-95-generic remote: npm ERR! argv "/tmp/build_c10a47380f869e4f82169d259a47dab7/.heroku/node/bin/node" "/tmp/build_c10a47380f869e4f82169d259a47dab7/.heroku/node/bin/npm" "install" "--unsafe-perm" "--userconfig" "/tmp/build_c10a47380f869e4f82169d259a47dab7/.npmrc" remote: npm ERR! node v6.1.0 remote: npm ERR! npm v3.8.9 remote: npm ERR! code ELIFECYCLE remote: npm ERR! xxxxxx@0.0.0 postinstall: `ng build --dev` remote: npm ERR! Exit status 1 remote: npm ERR! remote: npm ERR! Failed at the xxxxxx@0.0.0 postinstall script 'ng build --dev'. remote: npm ERR! Make sure you have the latest version of node.js and npm installed. remote: npm ERR! If you do, this is most likely a problem with the xxxxxx package, remote: npm ERR! not with npm itself. remote: npm ERR! Tell the author that this fails on your system: remote: npm ERR! ng build --dev remote: npm ERR! You can get information on how to open an issue for this project with: remote: npm ERR! npm bugs xxxxxx remote: npm ERR! Or if that isn't available, you can get their info via: remote: npm ERR! npm owner ls xxxxxx remote: npm ERR! There is likely additional logging output above. remote: remote: npm ERR! Please include the following file with any support request: remote: npm ERR! /tmp/build_c10a47380f869e4f82169d259a47dab7/npm-debug.log remote: remote: -----> Build failed remote: remote: We're sorry this build is failing! You can troubleshoot common issues here: remote: https://devcenter.heroku.com/articles/troubleshooting-node-deploys remote: remote: If you're stuck, please submit a ticket so we can help: remote: https://help.heroku.com/ remote: remote: Love, remote: Heroku remote: remote: ! Push rejected, failed to compile Node.js app. remote: remote: ! Push failed remote: Verifying deploy... remote: remote: ! Push rejected to xxxxxx. remote: 

你有什么想法为什么heroku不能build立angular2应用程序？ 如何解决这个问题？