diff --git a/e2e/scripts/helper.ts b/e2e/scripts/helper.ts
index 1d36600f3..fe2cd7ffb 100644
--- a/e2e/scripts/helper.ts
+++ b/e2e/scripts/helper.ts
@@ -6,8 +6,6 @@ import fg, {
 } from 'fast-glob';
 import fse from 'fs-extra';
 
-export const getFiles = async (_pattern: string) => {};
-
 // fast-glob only accepts posix path
 // https://github.com/mrmlnc/fast-glob#convertpathtopatternpath
 const convertPath = (path: string) => {
diff --git a/packages/plugin-dts/src/utils.ts b/packages/plugin-dts/src/utils.ts
index cba3bc1dc..8e3c80b78 100644
--- a/packages/plugin-dts/src/utils.ts
+++ b/packages/plugin-dts/src/utils.ts
@@ -63,6 +63,8 @@ export async function processDtsFiles(
 
   const dtsFiles = await fg(`${dir}/**/*.d.ts`);
 
+  console.log('11111 fg', dir, 'dtsFiles', dtsFiles);
+
   for (const file of dtsFiles) {
     try {
       const newFile = file.replace('.d.ts', dtsExtension);
@@ -107,7 +109,12 @@ export async function calcLongestCommonPath(
     return null;
   }
 
-  const splitPaths = absPaths.map((p) => p.split(path.sep));
+  // we support two cases
+  // 1. /packages-a/src/index.ts
+  // 2. D:/packages-a/src/index.ts
+  const sep = path.posix.sep as '/';
+
+  const splitPaths = absPaths.map((p) => p.split(sep));
   let lcaFragments = splitPaths[0]!;
   for (let i = 1; i < splitPaths.length; i++) {
     const currentPath = splitPaths[i]!;
@@ -121,7 +128,7 @@ export async function calcLongestCommonPath(
     lcaFragments = lcaFragments.slice(0, j);
   }
 
-  let lca = lcaFragments.length > 0 ? lcaFragments.join(path.sep) : '/';
+  let lca = lcaFragments.length > 0 ? lcaFragments.join(sep) : sep;
 
   const stats = await fsP.stat(lca);
   if (stats?.isFile()) {