diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
index 500e127..6e6adc0 100644
--- a/.gitea/workflows/build.yaml
+++ b/.gitea/workflows/build.yaml
@@ -11,11 +11,9 @@ jobs:
       - name: Prepare Source
         run: |
           echo "--- write source ---"
-          echo "deb http://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye main contrib non-free">/etc/apt/sources.list
-          echo "deb http://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-updates main contrib non-free">>/etc/apt/sources.list
-          echo "deb http://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-backports main contrib non-free">>/etc/apt/sources.list
-          cat /etc/apt/sources.list
           rm -rf /etc/apt/sources.list.d/*
+          sed -i 's|deb.debian.org|mirrors.tuna.tsinghua.edu.cn|' /etc/apt/sources.list
+          cat /etc/apt/sources.list
           echo "--- update source ---"
           apt-get update
       - name: Prepare Lftp