diff --git a/flake.lock b/flake.lock
index cf2a756..532134e 100644
--- a/flake.lock
+++ b/flake.lock
@@ -7,32 +7,32 @@
         ]
       },
       "locked": {
-        "lastModified": 1714043624,
-        "narHash": "sha256-Xn2r0Jv95TswvPlvamCC46wwNo8ALjRCMBJbGykdhcM=",
+        "lastModified": 1726989464,
+        "narHash": "sha256-Vl+WVTJwutXkimwGprnEtXc/s/s8sMuXzqXaspIGlwM=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "86853e31dc1b62c6eeed11c667e8cdd0285d4411",
+        "rev": "2f23fa308a7c067e52dfcc30a0758f47043ec176",
         "type": "github"
       },
       "original": {
         "owner": "nix-community",
-        "ref": "release-23.11",
+        "ref": "release-24.05",
         "repo": "home-manager",
         "type": "github"
       }
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1713995372,
-        "narHash": "sha256-fFE3M0vCoiSwCX02z8VF58jXFRj9enYUSTqjyHAjrds=",
+        "lastModified": 1752480373,
+        "narHash": "sha256-JHQbm+OcGp32wAsXTE/FLYGNpb+4GLi5oTvCxwSoBOA=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "dd37924974b9202f8226ed5d74a252a9785aedf8",
+        "rev": "62e0f05ede1da0d54515d4ea8ce9c733f12d9f08",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
-        "ref": "nixos-23.11",
+        "ref": "nixos-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index c5f5435..174e016 100644
--- a/flake.nix
+++ b/flake.nix
@@ -3,14 +3,14 @@
 
   inputs = {
     # Nixpkgs
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-23.11";
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
     # You can access packages and modules from different nixpkgs revs
     # at the same time. Here's an working example:
     nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";
     # Also see the 'unstable-packages' overlay at 'overlays/default.nix'.
 
     # Home manager
-    home-manager.url = "github:nix-community/home-manager/release-23.11";
+    home-manager.url = "github:nix-community/home-manager/release-24.05";
     home-manager.inputs.nixpkgs.follows = "nixpkgs";
   };
 
diff --git a/modules/nixos/orbstack.nix b/modules/nixos/orbstack.nix
index 9c98ef4..d671166 100644
--- a/modules/nixos/orbstack.nix
+++ b/modules/nixos/orbstack.nix
@@ -30,7 +30,7 @@
   '';
 
   # Disable sshd
-  services.openssh.enable = false;
+  # services.openssh.enable = false; disable for port 22
 
   # systemd
   systemd.services."systemd-oomd".serviceConfig.WatchdogSec = 0;
diff --git a/nixos/configuration.nix b/nixos/configuration.nix
index 115f25a..97b8ba2 100644
--- a/nixos/configuration.nix
+++ b/nixos/configuration.nix
@@ -21,7 +21,7 @@
     outputs.nixosModules.important-defaults
     outputs.nixosModules.incus
     outputs.nixosModules.orbstack
-    outputs.nixosModules.power-user-defaults
+    # outputs.nixosModules.power-user-defaults
   ];
 
   nixpkgs = {
@@ -80,6 +80,14 @@
     home = "/home/wongdingfeng";
     homeMode = "700";
     useDefaultShell = true;
+
+    # SSH keys
+    openssh.authorizedKeys.keys = [
+      # Add your SSH public keys here
+      # "ssh-rsa AAAAB3NzaC1yc2EAAAA... your-email@example.com"
+      # "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAA... your-email@example.com"
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICA/3qb5Eg8NSFMHXZqFlWI9TxHZHQtFAjvcDfiTUtbv wongdingfeng@Wong-Ding-Fengs-MacBook-Pro.local-2024-01-23"
+    ];
   };
 
   security.sudo.wheelNeedsPassword = false;
@@ -89,6 +97,42 @@
 
   time.timeZone = "Asia/Singapore";
 
+  # SSH Server configuration
+  services.openssh = {
+    enable = true;
+    settings = {
+      # Better security defaults
+      PasswordAuthentication = true;
+      PermitRootLogin = "yes";
+      
+      # Enable X11 forwarding
+      X11Forwarding = true;
+      X11DisplayOffset = 10;
+      X11UseLocalhost = true;
+      
+      # Additional security settings
+      Protocol = 2;
+      MaxAuthTries = 3;
+      ClientAliveInterval = 300;
+      ClientAliveCountMax = 2;
+      
+      # Allow only specific users (optional - uncomment if needed)
+      # AllowUsers = [ "wongdingfeng" ];
+    };
+    
+    # Optional: Custom port (uncomment if you want to change from default 22)
+    ports = [ 2222 ];
+  };
+
   # System packages are now handled in power-user-defaults.nix
-  # environment.systemPackages is defined there with a comprehensive list
+  environment.systemPackages = with pkgs; [
+    neovim
+    gitAndTools.gitFull
+    tmux
+    htop
+    neofetch
+    ripgrep
+    fd
+    ranger
+  ];
 }
diff --git a/nixos/hardware-configuration.nix b/nixos/hardware-configuration.nix
index 26d5527..b6193ef 100644
--- a/nixos/hardware-configuration.nix
+++ b/nixos/hardware-configuration.nix
@@ -1,12 +1,5 @@
 # This is just an example, you should generate yours with nixos-generate-config and put it in here.
 {
-  boot.loader.systemd-boot.enable = true;
-
-  fileSystems."/" = {
-    device = "/dev/sda1";
-    fsType = "ext4";
-  };
-
   # Set your system kind (needed for flakes)
   nixpkgs.hostPlatform = "aarch64-linux";
 }
diff --git a/result b/result
new file mode 120000
index 0000000..bc83037
--- /dev/null
+++ b/result
@@ -0,0 +1 @@
+/nix/store/q2s5w29nchhfr8x0hdq3bbij2kp827i7-nixos-system-nixos-lxc-25.11.20250714.62e0f05
\ No newline at end of file