Excluding files from @snowpack/plugin-postcss

[apust]

I am using Snowpack to develop and build a React app, and PostCSS to deal with styles.

Unfortunately @snowpack/plugin-postcss ignores Snowpack's exclude setting. In my index.tsx I have these CSS imports:

import './reset.css';
import 'react-perfect-scrollbar/dist/css/styles.css';
import './styles.css';

react-perfect-scrollbar styles are located in node_modules, and they're already production ready. Processing those styles a second time with my chain of PostCSS plugins causes bugs, i.e. scrollbar starts to appear on the left side.

One could argue that I need to tweak my plugin settings. But I feel I would still expect PostCSS plugin to ignore files from excluded folders.

Expected behaviour: I want @snowpack/plugin-postcss to process all imported CSS unless it comes from node_modules, when I'm using exclude: ['**/node_modules/**/*'] setting in snowpack.config.js.