diff --git a/Build/download-previous-build.ts b/Build/download-previous-build.ts
index 9d15427f..1faa972a 100644
--- a/Build/download-previous-build.ts
+++ b/Build/download-previous-build.ts
@@ -1,10 +1,12 @@
 import path from 'node:path';
+import fs from 'node:fs';
 import { pipeline } from 'node:stream/promises';
 import { task } from './trace';
 import { extract as tarExtract } from 'tar-fs';
 import type { Headers as TarEntryHeaders } from 'tar-fs';
 import zlib from 'node:zlib';
 import undici from 'undici';
+import picocolors from 'picocolors';
 
 const GITHUB_CODELOAD_URL = 'https://codeload.github.com/sukkalab/ruleset.skk.moe/tar.gz/master';
 const GITLAB_CODELOAD_URL = 'https://gitlab.com/SukkaW/ruleset.skk.moe/-/archive/master/ruleset.skk.moe-master.tar.gz';
@@ -12,10 +14,10 @@ const GITLAB_CODELOAD_URL = 'https://gitlab.com/SukkaW/ruleset.skk.moe/-/archive
 export const downloadPreviousBuild = task(require.main === module, __filename)(async (span) => {
   const publicDir = path.resolve(__dirname, '..', 'public');
 
-  // if (fs.existsSync(publicDir)) {
-  //   console.log(picocolors.blue('Public directory exists, skip downloading previous build'));
-  //   return;
-  // }
+  if (fs.existsSync(publicDir)) {
+    console.log(picocolors.blue('Public directory exists, skip downloading previous build'));
+    return;
+  }
 
   const tarGzUrl = await span.traceChildAsync('get tar.gz url', async () => {
     const resp = await undici.request(GITHUB_CODELOAD_URL, { method: 'HEAD' });
diff --git a/Build/lib/cache-filesystem.ts b/Build/lib/cache-filesystem.ts
index 95e1f1bf..9fc127dc 100644
--- a/Build/lib/cache-filesystem.ts
+++ b/Build/lib/cache-filesystem.ts
@@ -11,7 +11,7 @@ import { stringHash } from './string-hash';
 import { defaultRequestInit, fetchWithLog } from './fetch-retry';
 import { Custom304NotModifiedError, CustomAbortError, CustomNoETagFallbackError, fetchAssets, sleepWithAbort } from './fetch-assets';
 
-import type { Response, RequestInit } from 'undici';
+import type { Response, RequestInit, HeadersInit } from 'undici';
 
 const enum CacheStatus {
   Hit = 'hit',
@@ -329,9 +329,9 @@ export class Cache<S = string> {
           signal: controller.signal,
           ...defaultRequestInit,
           headers: (typeof etag === 'string' && etag.length > 0)
-            ? mergeHeaders(
-              defaultRequestInit.headers,
-              { 'If-None-Match': etag }
+            ? mergeHeaders<HeadersInit>(
+              { 'If-None-Match': etag },
+              defaultRequestInit.headers
             )
             : defaultRequestInit.headers
         }
diff --git a/Build/lib/fetch-retry.ts b/Build/lib/fetch-retry.ts
index 7233d8cd..e99a2433 100644
--- a/Build/lib/fetch-retry.ts
+++ b/Build/lib/fetch-retry.ts
@@ -133,7 +133,7 @@ export class ResponseError extends Error {
   }
 }
 
-export const defaultRequestInit: RequestInit = {
+export const defaultRequestInit = {
   headers: {
     'User-Agent': 'curl/8.9.1 (https://github.com/SukkaW/Surge)'
   }