diff --git a/packages/backend/ormconfig.js b/packages/backend/ormconfig.js
index dabc0893f4..ffa8fdd233 100644
--- a/packages/backend/ormconfig.js
+++ b/packages/backend/ormconfig.js
@@ -1,6 +1,6 @@
 import { DataSource } from 'typeorm';
-import { loadConfig } from './built/config.js';
-import { entities } from './built/postgres.js';
+import { loadConfig } from './src/config.ts';
+import { entities } from './src/postgres.ts';
 
 const isConcurrentIndexMigrationEnabled = process.env.MISSKEY_MIGRATION_CREATE_INDEX_CONCURRENTLY === '1';
 
diff --git a/packages/backend/scripts/generate_api_json.js b/packages/backend/scripts/generate_api_json.js
index 798e243004..c5da70841b 100644
--- a/packages/backend/scripts/generate_api_json.js
+++ b/packages/backend/scripts/generate_api_json.js
@@ -3,8 +3,8 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
+import { writeFileSync } from 'node:fs';
 import { execa } from 'execa';
-import { writeFileSync, existsSync } from "node:fs";
 
 async function main() {
 	if (!process.argv.includes('--no-build')) {
@@ -14,15 +14,9 @@ async function main() {
 		});
 	}
 
-	if (!existsSync('./built')) {
-		throw new Error('`built` directory does not exist.');
-	}
+	const { loadConfig } = await import('../src/config.ts');
 
-	/** @type {import('../src/config.js')} */
-	const { loadConfig } = await import('../built/config.js');
-
-	/** @type {import('../src/server/api/openapi/gen-spec.js')} */
-	const { genOpenapiSpec } = await import('../built/server/api/openapi/gen-spec.js');
+	const { genOpenapiSpec } = await import('../src/server/api/openapi/gen-spec.ts');
 
 	const config = loadConfig();
 	const spec = genOpenapiSpec(config, true);