diff --git a/modules/nix.nix b/modules/nix.nix
index a054952..8200a53 100644
--- a/modules/nix.nix
+++ b/modules/nix.nix
@@ -37,7 +37,7 @@ lib.my.makeSwitch {
       # Deduplicate and optimize nix store
       auto-optimise-store = true;
       substituters = [
-        # "https://mirror.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"