Read more about the issue here: https://hackmd.io/MlqFp-yrSx-0mw4rD7dnQQ

• bazel build packages/material/snack-bar
• Open ./bazel-bin/packages/material/snack-bar.js
• See how NGC generated an import to @angular/cdk/overlay/overlay. This is incorrect as the import should always refer to public name of the entry-point.

1. yarn ngc -p test-vanilla-ngc/a/tsconfig.json
2. yarn ngc -p test-vanilla-ngc/b/tsconfig.json.

Both of these compilations work. b properly builds with metadata of a.

Now change in test-vanilla-ngc/b/tsconfig.json the generateCodeForLibraries option and notice how the metadata of a is discarded if you rebuild b.

3. yarn ngc -p test-vanilla-ngc/b/tsconfig.json.