diff --git a/scripts/build-post-list.js b/scripts/build-post-list.js
index f0383090550e..3159c6e32a6b 100644
--- a/scripts/build-post-list.js
+++ b/scripts/build-post-list.js
@@ -1,11 +1,12 @@
 const { readdirSync, statSync, existsSync, readFileSync, writeFileSync } = require('fs')
-const { resolve, basename, join, sep } = require('path')
+const { basename, join, sep } = require('path')
 const frontMatter = require('gray-matter')
 const toc = require('markdown-toc')
 const { slugify } = require('markdown-toc/lib/utils')
 const readingTime = require('reading-time')
 const { markdownToTxt } = require('markdown-to-txt')
 const { buildNavTree, addDocButtons } = require('./build-docs')
+const path = require('path');
 
 let specWeight = 100
 const result = {
@@ -54,7 +55,7 @@ function walkDirectories(directories, result, basePath, sectionWeight = 0, secti
       let details
       const fileName = join(directory, file)
       const fileNameWithSection = join(fileName, '_section.mdx')
-      const slug = fileName.replace(new RegExp(`^${basePath.replace(/\\/g, sep).replace(/\//g, sep)}`), '').replace(/\\/g, '/');  // Normalize slugs to use `/`
+      const slug = fileName.replace(new RegExp(`^${basePath.replace(/\\/g, sep).replace(/\//g, sep)}`), '').split(sep).join('/'); // Normalize slugs using posix-style paths
       const slugElements = slug.split('/');
       
       if (isDirectory(fileName)) {
@@ -96,7 +97,7 @@ function walkDirectories(directories, result, basePath, sectionWeight = 0, secti
         details.rootSectionId = rootSectionId
         details.id = fileName
         details.isIndex = fileName.endsWith(join(sep, 'index.mdx'))  // Platform-independent index check
-        details.slug = details.isIndex ? sectionSlug : slug.replace(/\.mdx$/, '')
+        details.slug = details.isIndex ? sectionSlug : path.posix.join(slug.replace(/\.mdx$/, ''));
         if (details.slug.includes('/reference/specification/') && !details.title) {
           const fileBaseName = basename(data.slug)  // ex. v2.0.0 | v2.1.0-next-spec.1
           const fileName = fileBaseName.split('-')[0] // v2.0.0 | v2.1.0