How to resolve .less files ?

I’m using tsup in a component package in my monorepo. This component package requires less support and I’m unable to use less files in this

[ERROR] No loader is configured for ".less" files: src/atoms/ZSelect/index.module.less

error TS6054: File '/packages/ui/src/atoms/ZSelect/index.module.less' has an unsupported extension. The only supported extensions are '.ts', '.tsx', '.d.ts', '.cts', '.d.cts', '.mts', '.d.mts'.
  The file is in the program because:
    Root file specified for compilation

How can I add less loader in config?

[Manonicu]

pls support “.less,scss” etc files

[jeffreys-cat]

you can use https://www.npmjs.com/package/esbuild-plugin-less

import { defineConfig } from 'tsup';
import { lessLoader } from 'esbuild-plugin-less';

export default defineConfig({
    esbuildPlugins: [lessLoader()],
});