fix

modules/nixos/tmpsys.nix

@@ -5,6 +5,11 @@
     inputs.impermanence.nixosModules.impermanence
   ];
 
+  # 系统启动时确保持久化目录存在
+  system.activationScripts.persistent-dirs.text = ''
+    mkdir -p /nix/persistent
+  '';
+  
   # 启用 tmpfs 作为根文件系统
   fileSystems."/" = lib.mkForce{
     device = "none";
@@ -12,6 +17,20 @@
     options = [ "defaults" "size=2G" "mode=755" ];
   };
 
+  # 将 /nix 存储在持久化分区
+  fileSystems."/nix" = lib.mkForce{
+    device = "/nix/persistent/nix";
+    fsType = "btrfs";
+    options = [ "compress-force=zstd" ];
+  };
+
+  # 建议的 fstab 配置
+  fileSystems."/nix/persistent" = {
+    device = "/dev/disk/by-label/nixos-persistent";  # 需要根据实际情况修改
+    fsType = "btrfs";
+    neededForBoot = true;
+  };
+
   # 配置持久化存储
   environment.persistence."/nix/persistent" = {
     # 不在文件管理器中显示这些挂载点
@@ -61,23 +80,6 @@
     };
   };
 
-  # 系统启动时确保持久化目录存在
-  system.activationScripts.persistent-dirs.text = ''
-    mkdir -p /nix/persistent
-  '';
 
-  # 建议的 fstab 配置
-  fileSystems."/nix/persistent" = {
-    device = "/dev/disk/by-label/nixos-persistent";  # 需要根据实际情况修改
-    fsType = "ext4";
-    neededForBoot = true;
-  };
-
-  # 将 /nix 存储在持久化分区
-  fileSystems."/nix" = {
-    device = "/nix/persistent/nix";
-    fsType = "btrfs";
-    options = [ "bind" ];
-  };
 }