Problem reproduction

This is a reproduction repo for a "Appears in the NgModule.imports of AppModule, but could not be resolved to an NgModule class" problem, which shows when using npm link (such as when using lerna).

Angular github issue: #35447

Steps to reproduce

• checkout the repo
• npm install
• ng build lib1 --prod && ng build --prod (builds correctly)
• cd projects/lib1 && npm link && cd ../.. && npm link lib1
• ng build lib1 --prod && ng build --prod (fails)

Creation of the repo

These are the steps used to create this repo:

• ng new import-not-resolved-repro
• cd import-not-resolved-repro
• ng generate library lib1
• modify src/app/app.module.ts to load Lib1Module from lib1