fix

modules/nixos/core.nix

@@ -52,6 +52,8 @@
       auto-optimise-store = true;
       substituters = [
         "https://mirrors.ustc.edu.cn/nix-channels/store"
+        "https://mirror.sjtu.edu.cn/nix-channels/store"
+        "https://mirrors.tuna.tsinghua.edu.cn/nix-channels/store"
         "https://nixos-cn.cachix.org"
         "https://nix-community.cachix.org"
         "https://cache.nixos.org/"
@@ -60,6 +62,9 @@
         "nixos-cn.cachix.org-1:L0jEaL6w7kwQOPlLoCR3ADx+E3Q8SEFEcB9Jaibl0Xg="
         "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
       ];
+      # 添加以下配置以允许失败时从源码构建
+      fallback = true;
+      keep-going = true;
     };
     gc = {
       automatic = true;