diff --git a/modules/core/nix.nix b/modules/core/nix.nix
index 9032f1c..af03a22 100644
--- a/modules/core/nix.nix
+++ b/modules/core/nix.nix
@@ -40,8 +40,8 @@ in
     nix.settings = {
       experimental-features = "nix-command flakes pipe-operators";
       substituters = [
-        "https://mirrors.sjtug.sjtu.edu.cn/nix-channels/store"
         "https://mirror.sjtu.edu.cn/nix-channels/store"
+        "https://mirrors.sjtug.sjtu.edu.cn/nix-channels/store"
         "https://mirrors.ustc.edu.cn/nix-channels/store"
         "https://nix-community.cachix.org"
         "https://cache.garnix.io"