Vite-plugin-federation is conflicting with Vanilla-Extract vite plugin and it doesn't load CSS styles

[smitev]

Versions

• vite-plugin-federation: v1.3.8
• vite: v5.4.11

Reproduction

https://github.com/smitev/vanilla-extract-vite-module-federation

Steps to reproduce

1. Build the remote app: yarn build:remotes
2. Serve (preview) the built remote app: yarn serve:remotes

What is Expected?

It should extract the Vanilla Extract styling in .css files and load it in the remote app.

What is actually happening?

It's not extracting the Vanilla Extract styling in .css files, but it ends in the .js files and we get this Vanilla Extract error:

Uncaught Error: Styles were unable to be assigned to a file. This is generally caused by one of the following:

- You may have created styles outside of a '.css.ts' context

[smitev]

I already raised this issue with Vanilla Extract (# 1506), but they suspect the non-deterministic build is related to Vite-plugin-federation.