Hi Anton,
Awesome work. I'm really excited to try it in my Angular project, but can't get it to work.

Reproduce:

Node 14 (nvm use 14)
Angular-cli 11 (npm install -g @angular/cli@11)

https://github.com/ttimmy/ng11-rewiremock

First attempt (naive), simply try to .proxy , got error:
Error: Uncaught Error: Rewiremock: there is no "parent module". Is there two HotModuleReplacementPlugins?
git checkout cd29be60181046cebdf0f0876d40662375871f3b
ng test

Second attempt, try to use custom webpack config for karma build. Got:
WebpackOptionsValidationError: Invalid configuration object. Webpack has been initialised using a configuration object that does not match the API schema.
git checkout b18c23a4678e78629bebcd047f6125268131d1dd
ng test

Thanks
JC