Keep environment.ts a separate file in bundling for browser?

When doing ionic build --prod, the file environment.ts (after being replaced by gets minimized, uglified and bundled.

Is there a way to prevent this, so that environment.ts remains a separate, non-uglified file in the browser bundle?

(I still want the rest of the code to be optimized for production of course)

Rationale: I’d like to distribute the pre-built bundle to different server admins for installation on their servers, and they need to make local adjustments to environment.ts. I want to spare them the effort to do a local build only because they need to adjust one value in environment.ts.