Angular is going to remove ngcc functionality in upcoming v16 which will drop support for all view engine libraries including this library. > @ngtools/webpack > NGCC integration has been removed and as a result Angular View Engine libraries will no longer work. Changelog link - - https://github.com/angular/angular-cli/blob/16.0.0-next.1/CHANGELOG.md#ngtoolswebpack - https://github.com/angular/angular-cli/blob/16.0.0-next.1/CHANGELOG.md#ngtoolswebpack-1 Commit link - https://github.com/angular/angular-cli/commit/c8ac660d8b13922be7ebcc92dfd5b18392602c40#diff-9c7ca60aad39fc0d92fc425a1e82ce3aa951179305575e44816323d1f57d110c PR link - https://github.com/angular/angular-cli/pull/24720