Importing less files from a third party library crashes the build.

[florinpavel22]

To reproduce:

1. Create a new project folder.
2. Run npm init -y.
3. Install less and swiper.
4. Create a main.less file in the root/src folder.
5. Create a build script that runs lessc (src/)main.less output/styles.css.

Add these lines in the main.less file.

@import (less) 'swiper/less';
@import (less) 'swiper/less/navigation';
@import (less) 'swiper/less/pagination';

Current behavior:
The build script fails with the following error.

FileError: 'swiper/less' wasn't found. Tried - path\swiper-package\swiper\less.less,path\swiper-package\swiper\less.less,npm://swiper\less,npm://swiper\less.less,swiper\less.less in path\swiper-package\main.less on line 1, column 1:
1 @import (less) 'swiper/less';

Expected behavior:

Should have outputted the CSS. Not sure if this is because swiper is using exports in their package.json file.
From reports I heard at work, this works fine on Mac.

Environment information:

• less version: 4.1.3
• nodejs version: 16.15.0
• operating system: Windows 10/11 x64

[matthew-dean]

Sounds like it could be an issue with node_modules path resolving on Windows. Can you create an example repo?