Can't build Angular project after upgrade from 8 to 9 - node.js

Question

I've done an upgrade of my Angular project from 8 to 9 by using the ng update tool. Locally (Windows) everything works fine, but when I'm trying to build the project in docker, I get the following error:
Step 6/11 : RUN npm run build
---> Running in d60f739a56f6
> check-it-frontend#0.0.0 build /app
> ng build --prod
Compiling #angular/core : es2015 as esm2015
ERROR in EINVAL: invalid argument, rename '/app/node_modules/#angular/core/core.d.ts' -> '/app/node_modules/#angular/core/core.d.ts.__ivy_ngcc_bak'
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! check-it-frontend#0.0.0 build: `ng build --prod`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the check-it-frontend#0.0.0 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! /root/.npm/_logs/2020-03-20T11_44_02_696Z-debug.log
The command '/bin/sh -c npm run build' returned a non-zero code: 1
The dockerfile:
FROM node:13.10.1-stretch as base
RUN apt-get update -qq && apt-get install -y build-essential
ADD . /app
WORKDIR /app
RUN npm ci
RUN npm run build
Dependencies:
"dependencies": {
"#angular/animations": "^9.0.7",
"#angular/cdk": "^8.2.3",
"#angular/common": "^9.0.7",
"#angular/compiler": "^9.0.7",
"#angular/core": "^9.0.7",
"#angular/forms": "^9.0.7",
"#angular/material": "^8.2.3",
"#angular/platform-browser": "^9.0.7",
"#angular/platform-browser-dynamic": "^9.0.7",
"#angular/router": "^9.0.7",
"core-js": "^2.4.1",
"rxjs": "^6.5.4",
"rxjs-compat": "^6.0.0-rc.0",
"tslib": "^1.10.0",
"zone.js": "~0.10.2"
},
"devDependencies": {
"#angular-devkit/build-angular": "~0.900.7",
"#angular/cli": "^9.0.7",
"#angular/compiler-cli": "^9.0.7",
"#angular/language-service": "^9.0.7",
"#types/jasmine": "~2.8.3",
"#types/jasminewd2": "~2.0.2",
"#types/node": "^12.11.1",
"codelyzer": "^5.1.2",
"jasmine-core": "~2.8.0",
"jasmine-spec-reporter": "~4.2.1",
"karma": "~2.0.0",
"karma-chrome-launcher": "~2.2.0",
"karma-coverage-istanbul-reporter": "^1.2.1",
"karma-jasmine": "~1.1.0",
"karma-jasmine-html-reporter": "^0.2.2",
"node-sass": "^4.13.1",
"protractor": "~5.1.2",
"ts-node": "~4.1.0",
"tslint": "~5.9.1",
"typescript": "~3.7.5"
}
Anything I can do to fix it? Images for Angular 8 were fine. I've tried different node images, but nothing helped...

Answer 1

I'm not exactly sure what your issue is or what's causing it, but I did a quick search and stumbled upon this github issue. It concerns parallel builds (which I don't think is your case), but I thought it could still apply here since the error happens during the compilation of angular core.
The suggested workaround is to run the angular compatibility compiler (ngcc) as a postinstall script, instead of having the build trigger it itself.
Modify your package.json file and add the following to the scripts section:
"postinstall": "ngcc