diff --git a/modules/nixos/tmpsys.nix b/modules/nixos/tmpsys.nix
index 034f7dd..bc571f8 100644
--- a/modules/nixos/tmpsys.nix
+++ b/modules/nixos/tmpsys.nix
@@ -6,7 +6,7 @@
   ];
 
   # 启用 tmpfs 作为根文件系统
-  fileSystems."/" = {
+  fileSystems."/" = lib.mkForce{
     device = "none";
     fsType = "tmpfs";
     options = [ "defaults" "size=2G" "mode=755" ];