diff --git a/docs/nixos-with-flakes/nixos-with-flakes-enabled.md b/docs/nixos-with-flakes/nixos-with-flakes-enabled.md
index 4175232..7bed2be 100644
--- a/docs/nixos-with-flakes/nixos-with-flakes-enabled.md
+++ b/docs/nixos-with-flakes/nixos-with-flakes-enabled.md
@@ -74,8 +74,8 @@ Note that the copied template cannot be used directly. You need to modify it to
     # The most widely used is `github:owner/name/reference`,
     # which represents the GitHub repository URL + branch/commit-id/tag.
 
-    # Official NixOS package source, using nixos-unstable branch here
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    # Official NixOS package source, using nixos-23.11 branch here
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11";
     # home-manager, used for managing user configuration
     home-manager = {
       url = "github:nix-community/home-manager/release-23.11";
diff --git a/docs/zh/nixos-with-flakes/nixos-with-flakes-enabled.md b/docs/zh/nixos-with-flakes/nixos-with-flakes-enabled.md
index 8a91a07..9416728 100644
--- a/docs/zh/nixos-with-flakes/nixos-with-flakes-enabled.md
+++ b/docs/zh/nixos-with-flakes/nixos-with-flakes-enabled.md
@@ -70,8 +70,8 @@ cat flake.nix
     #     github:owner/name/reference
     # 即 github 仓库地址 + branch/commit-id/tag
 
-    # NixOS 官方软件源，这里使用 nixos-unstable 分支
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    # NixOS 官方软件源，这里使用 nixos-23.11 分支
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11";
     # home-manager，用于管理用户配置
     home-manager = {
       url = "github:nix-community/home-manager/release-23.11";