Angular 13 Library watch rebuild with managed assets

[sunil-tf]

Type of Issue

[ X] Bug Report
[ ] Feature Request

Description

In an angular library project upgraded to angular 13 added sass export in library package.json following instructions in https://angular.io/guide/creating-libraries#managing-assets-in-a-library

"exports": {
    "./theme": {
      "sass": "./_theme.scss"
    },

The library is built using ng build --watch and builds ok first time.
On subsequent rebuilds , getting an error

✔ Compiling with Angular sources in Ivy full compilation mode.
✔ Writing FESM bundles
✔ Copying assets
✖ Writing package manifest
ERROR: Found a conflicting export condition for "./package.json". The "default" condition would be overridden by ng-packagr. Please unset it.

If i remove the exports entry from library package.json then rebuilds work ok.

How To Reproduce

Mentioned above.

Expected Behaviour

Rebuild without errors

Version Information

ng-packagr:            13.0.6
@angular/compiler:     13.0.2
rollup:                2.60.0
typescript:            4.4.4
node: v14.18.1
npm : 6.14.15

[sunil-tf]

Thanks @alan-agius4 rebuild works ok with 13.0.7

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