From 57f9222b1c55b92210aaa91ddafefaa3b37a2e66 Mon Sep 17 00:00:00 2001
From: Jussi Rantala <jussi.rantala@xa.epicgames.com>
Date: Tue, 29 Apr 2025 11:33:25 +0300
Subject: [PATCH] fix(rollup-plugin): Fix relative paths on Windows env

---
 packages/rollup-plugin/src/index.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/rollup-plugin/src/index.ts b/packages/rollup-plugin/src/index.ts
index 66badebcd..3754ddeb4 100644
--- a/packages/rollup-plugin/src/index.ts
+++ b/packages/rollup-plugin/src/index.ts
@@ -8,7 +8,7 @@ import {
   virtualCssFileFilter,
   CompileOptions,
 } from '@vanilla-extract/integration';
-import { posix } from 'path';
+import { posix, sep } from 'path';
 
 const { relative, normalize, dirname } = posix;
 
@@ -86,7 +86,7 @@ export function vanillaExtractPlugin({
     },
     // Replace .css import paths with relative paths to emitted css files
     renderChunk(code, chunkInfo) {
-      const chunkPath = dirname(chunkInfo.fileName);
+      const chunkPath = dirname(chunkInfo.fileName.replaceAll(sep, posix.sep));
       const output = chunkInfo.imports.reduce((codeResult, importPath) => {
         const moduleInfo = this.getModuleInfo(importPath);
         if (!moduleInfo?.meta.assetId) {