From e90b6f266cc545136a59cd3faf60610958dda44f Mon Sep 17 00:00:00 2001
From: Wu Clan <jianhengwu0407@gmail.com>
Date: Sun, 11 Oct 2026 10:31:18 +0800
Subject: [PATCH] Fix plugin dependency index resolution (#1271)

---
 backend/plugin/requirements.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/backend/plugin/requirements.py b/backend/plugin/requirements.py
index aecec112..4bc17c91 100644
--- a/backend/plugin/requirements.py
+++ b/backend/plugin/requirements.py
@@ -89,13 +89,17 @@ def install_requirements(plugin: str | None) -> None:  # ruff:ignore[complex-str
         if not _is_in_virtualenv():
             pip_install.append('--system')
         if settings.PLUGIN_PIP_CHINA:
-            # 将国内源作为优先索引，同时保留 PyPI 作为回退来源
+            # 使用 PyPI 作为优先索引，国内源作为回退来源
             pip_install.extend([
-                '--index',
+                '--default-index',
                 settings.PLUGIN_PIP_INDEX_URL,
+                '--index',
+                'https://pypi.org/simple/',
                 '--index-strategy',
                 'unsafe-best-match',
             ])
+        else:
+            pip_install.extend(['--index', 'https://pypi.org/simple/'])
 
         max_retries = settings.PLUGIN_PIP_MAX_RETRY
         for attempt in range(max_retries):