diff --git a/flake.lock b/flake.lock
index 555c925f..633d9c4d 100644
--- a/flake.lock
+++ b/flake.lock
@@ -793,6 +793,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-2505": {
+      "locked": {
+        "lastModified": 1764560356,
+        "narHash": "sha256-M5aFEFPppI4UhdOxwdmceJ9bDJC4T6C6CzCK1E2FZyo=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "6c8f0cca84510cc79e09ea99a299c9bc17d03cb6",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-25.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixpkgs-darwin": {
       "locked": {
         "lastModified": 1764081664,
@@ -1120,6 +1136,7 @@
         "nixos-generators": "nixos-generators",
         "nixpak": "nixpak",
         "nixpkgs": "nixpkgs_6",
+        "nixpkgs-2505": "nixpkgs-2505",
         "nixpkgs-darwin": "nixpkgs-darwin",
         "nixpkgs-master": "nixpkgs-master",
         "nixpkgs-mesa": "nixpkgs-mesa",
diff --git a/flake.nix b/flake.nix
index 6528feec..7a87e475 100644
--- a/flake.nix
+++ b/flake.nix
@@ -38,6 +38,7 @@
     nixpkgs-stable.url = "github:nixos/nixpkgs/nixos-25.11";
     # revert mesa to 25.2.6
     nixpkgs-mesa.url = "github:nixos/nixpkgs/2b1f0ea3ee3952e68b164efa0a1c5e394ef2e781";
+    nixpkgs-2505.url = "github:nixos/nixpkgs/nixos-25.05";
 
     # nixpkgs with some custom patches
     nixpkgs-patched.url = "github:ryan4yin/nixpkgs/nixos-unstable-patched";
diff --git a/home/base/tui/container.nix b/home/base/tui/container.nix
index 52c9ab30..67ae0f3c 100644
--- a/home/base/tui/container.nix
+++ b/home/base/tui/container.nix
@@ -1,6 +1,6 @@
 {
   pkgs,
-  pkgs-stable,
+  pkgs-2505,
   nur-ryan4yin,
   ...
 }:
@@ -25,7 +25,7 @@
     istioctl
     clusterctl # for kubernetes cluster-api
     kubevirt # virtctl
-    pkgs-stable.kubernetes-helm
+    pkgs-2505.kubernetes-helm
     fluxcd
     argocd
 
diff --git a/home/base/tui/shell/default.nix b/home/base/tui/shell/default.nix
index 73497656..27485885 100644
--- a/home/base/tui/shell/default.nix
+++ b/home/base/tui/shell/default.nix
@@ -17,8 +17,8 @@
       # https://platform.moonshot.cn/docs/guide/agent-support
       # $env.ANTHROPIC_BASE_URL = "https://api.moonshot.cn/anthropic/"
       # $env.ANTHROPIC_AUTH_TOKEN = $env.MOONSHOT_API_KEY
-      # $env.ANTHROPIC_MODEL = "kimi-k2-0905-preview"
-      # $env.ANTHROPIC_DEFAULT_HAIKU_MODEL = "kimi-k2-turbo-preview"
+      # $env.ANTHROPIC_MODEL = "kimi-k2-thinking"
+      # $env.ANTHROPIC_DEFAULT_HAIKU_MODEL = "kimi-k2-thinking-turbo"
 
       # using claude-code with glm llm
       # https://docs.bigmodel.cn/cn/coding-plan/tool/claude
diff --git a/outputs/default.nix b/outputs/default.nix
index 7f8695a6..ab25c9d9 100644
--- a/outputs/default.nix
+++ b/outputs/default.nix
@@ -23,7 +23,11 @@ let
       #   # To use chrome, we need to allow the installation of non-free software
       #   config.allowUnfree = true;
       # };
-
+      pkgs-2505 = import inputs.nixpkgs-2505 {
+        inherit system;
+        # To use chrome, we need to allow the installation of non-free software
+        config.allowUnfree = true;
+      };
       pkgs-stable = import inputs.nixpkgs-stable {
         inherit system;
         # To use chrome, we need to allow the installation of non-free software