Rollup emitFile throws error when importing css.ts over package

[flex-mookeun]

Hi there,

I'm trying to setup vanilla-extract in my monorepo based on rollup.
To provide a theme (including createTheme and maybe sprinkle) which should be available throughout the project, I chose to create a new package and serve theme.css.ts directly rather than serving compiled result by the plugin.

Then I get following error while building another package consuming the theme:

RollupError: The "fileName" or "name" properties of emitted chunks and assets must be strings that are neither absolute nor relative paths

As far as I know, this is because referenced theme file is resolved with relative path (../packages/theme/theme.css.ts) by the consumer, and when the plugin creates css, relative path is not allowed as file name (of cource) by the rollup emitFile API.

Quick fix I tried was giving project root path as cwd param of VanillExtractPlugin to make the path non-relative. (e.g. ../theme/theme.css.ts to packages/theme/theme.css.ts)

I found this issue with the same error message,
but that was not monorepo case so I assume there could be better solution we can discuss.

Thanks in advance.