diff --git a/scripts/tasks/sandbox-parts.ts b/scripts/tasks/sandbox-parts.ts
index 0f826a81343e..4245a1b01952 100644
--- a/scripts/tasks/sandbox-parts.ts
+++ b/scripts/tasks/sandbox-parts.ts
@@ -13,6 +13,7 @@ import {
 } from 'fs-extra';
 import { join, resolve, sep } from 'path';
 
+import slash from 'slash';
 import type { Task } from '../task';
 import { executeCLIStep, steps } from '../utils/cli-step';
 import { installYarn2, configureYarn2ForVerdaccio, addPackageResolutions } from '../utils/yarn';
@@ -262,8 +263,8 @@ function addStoriesEntry(mainConfig: ConfigFile, path: string) {
   const stories = mainConfig.getFieldValue(['stories']) as string[];
 
   const entry = {
-    directory: join('../template-stories', path),
-    titlePrefix: path,
+    directory: slash(join('../template-stories', path)),
+    titlePrefix: slash(path),
     files: '**/*.@(mdx|stories.@(js|jsx|ts|tsx))',
   };
 
diff --git a/scripts/utils/main-js.ts b/scripts/utils/main-js.ts
index b2e6e966fce1..a9517f515617 100644
--- a/scripts/utils/main-js.ts
+++ b/scripts/utils/main-js.ts
@@ -1,6 +1,7 @@
 import { existsSync } from 'fs';
 import { join, resolve } from 'path';
 
+import slash from 'slash';
 import type { ConfigFile } from '../../code/lib/csf-tools';
 import { readConfig } from '../../code/lib/csf-tools';
 import { getInterpretedFile } from '../../code/lib/core-common';
@@ -19,5 +20,5 @@ export async function readMainConfig({ cwd }: { cwd: string }) {
 
 export function addPreviewAnnotations(mainConfig: ConfigFile, paths: string[]) {
   const config = mainConfig.getFieldValue(['previewAnnotations']) as string[];
-  mainConfig.setFieldValue(['previewAnnotations'], [...(config || []), ...paths]);
+  mainConfig.setFieldValue(['previewAnnotations'], [...(config || []), ...paths.map(slash)]);
 }