diff --git a/README.md b/README.md
index 493beca..80af669 100644
--- a/README.md
+++ b/README.md
@@ -45,6 +45,68 @@ brew bundle --file Brewfile-cask
 brew bundle --file Brewfile-app 
 ```
 
+### `*nix` Install [Nix](https://nixos.org/download.html)
+
+```bash
+# For single-user installation
+sh <(curl -L https://nixos.org/nix/install) --no-daemon
+
+# For multi-user installation
+sh <(curl -L https://nixos.org/nix/install)
+
+# macOS 10.15 Catalina or newer needs this extra step
+mkdir -p ~/.config/nix
+echo "experimental-features = nix-command flakes" > ~/.config/nix/nix.conf
+```
+
+#### Benefits of Nix
+
+- **Reproducible**: Same packages and versions across all machines
+- **Declarative**: System configuration defined in code
+- **Reliable**: No dependency conflicts, clean rollbacks
+- **Multi-user**: Different users can have different configurations without interference
+- **Atomic upgrades and rollbacks**: Easy to go back if something breaks
+- **Works alongside Homebrew**: Can be used together with existing setup
+
+### `MacOS` Install [nix-darwin](https://github.com/LnL7/nix-darwin)
+
+```bash
+# First ensure Nix is installed from the step above
+
+# Clone this repo to get the darwin configuration
+# or use the example configuration below to create your own
+git clone https://github.com/dfdgsdfg/dotfiles.git
+cd dotfiles
+
+# Build the initial configuration (first-time setup)
+nix build .#darwinConfigurations.$(hostname -s).system
+
+# Apply the configuration
+./result/sw/bin/darwin-rebuild switch --flake .#
+```
+
+### Using Nix and nix-darwin
+
+The Nix configuration is organized as follows:
+
+- `flake.nix`: The main entry point for nix-darwin
+- `nix/darwin-configuration.nix`: Base configuration for macOS systems
+- `nix/home.nix`: Home Manager configuration for user environment
+
+To customize for your machine:
+
+1. Edit `flake.nix` to change "yourhost" to your machine's hostname
+2. Customize `nix/home.nix` with your Git information and preferred packages
+3. Create a host-specific configuration file by copying `nix/example-host.nix` to `nix/yourhostname.nix`
+4. Update the configuration: `darwin-rebuild switch --flake .#`
+
+After setting up, you can update your system with:
+
+```bash
+# Update packages and apply configuration
+darwin-rebuild switch --flake .#
+```
+
 ### `*nix` Config [mise](https://github.com/jdx/mise)
 ```sh
 mise i
diff --git a/dot_config/fish/config.fish b/dot_config/fish/config.fish
index 3b2872b..da75007 100644
--- a/dot_config/fish/config.fish
+++ b/dot_config/fish/config.fish
@@ -3,6 +3,12 @@ set fisher_home ~/.local/share/fisherman
 set fisher_config ~/.config/fisherman
 
 
+# Nix
+if test -e ~/.nix-profile/etc/profile.d/nix.sh
+    bass source ~/.nix-profile/etc/profile.d/nix.sh
+end
+
+
 # Homebrew, mise
 switch (sysctl -n machdep.cpu.brand_string)
     case '*Apple*'
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..34a87ba
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,32 @@
+{
+  description = "Dotfiles nix-darwin configuration";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
+    darwin.url = "github:lnl7/nix-darwin";
+    darwin.inputs.nixpkgs.follows = "nixpkgs";
+    home-manager.url = "github:nix-community/home-manager";
+    home-manager.inputs.nixpkgs.follows = "nixpkgs";
+  };
+
+  outputs = inputs@{ self, nixpkgs, darwin, home-manager, ... }: {
+    darwinConfigurations = {
+      # Change "yourhost" to your hostname
+      # You can get your hostname by running `hostname -s` in terminal
+      # Multiple hosts can be defined here for different machines
+      yourhost = darwin.lib.darwinSystem {
+        system = "aarch64-darwin"; # For Apple Silicon Mac, use "x86_64-darwin" for Intel
+        modules = [
+          ./nix/darwin-configuration.nix
+          home-manager.darwinModules.home-manager
+          {
+            home-manager.useGlobalPkgs = true;
+            home-manager.useUserPackages = true;
+            home-manager.users.${builtins.getEnv "USER"} = import ./nix/home.nix;
+          }
+        ];
+        specialArgs = { inherit inputs; };
+      };
+    };
+  };
+}
\ No newline at end of file
diff --git a/nix/.gitignore b/nix/.gitignore
new file mode 100644
index 0000000..f295f42
--- /dev/null
+++ b/nix/.gitignore
@@ -0,0 +1,2 @@
+result
+result-*
\ No newline at end of file
diff --git a/nix/darwin-configuration.nix b/nix/darwin-configuration.nix
new file mode 100644
index 0000000..6d84edd
--- /dev/null
+++ b/nix/darwin-configuration.nix
@@ -0,0 +1,86 @@
+{ config, pkgs, inputs, ... }:
+
+{
+  # Set up nix settings
+  nix.settings = {
+    experimental-features = [ "nix-command" "flakes" ];
+    substituters = [
+      "https://cache.nixos.org/"
+    ];
+  };
+
+  # Allow unfree packages
+  nixpkgs.config.allowUnfree = true;
+
+  # Auto upgrade nix package and the daemon service
+  services.nix-daemon.enable = true;
+
+  # Used for backwards compatibility
+  system.stateVersion = 4;
+
+  # Create /etc/zshrc that loads the nix-darwin environment
+  programs.zsh.enable = true;
+  
+  # Enable fish shell
+  programs.fish.enable = true;
+  
+  # Install packages
+  environment.systemPackages = with pkgs; [
+    # Common CLI tools already in Brewfile
+    git
+    neovim
+    wget
+    bat
+    fd
+    ripgrep
+    jq
+    yq
+    # Add any other packages you want installed system-wide
+  ];
+  
+  # Set environment variables
+  environment.variables = {
+    EDITOR = "nvim";
+  };
+  
+  # Install homebrew - allows coexistence with Nix
+  # Comment this out if you prefer to manage Homebrew separately
+  homebrew = {
+    enable = true;
+    onActivation = {
+      autoUpdate = true;
+      cleanup = "zap"; # Remove unmanaged formulae
+    };
+    global = {
+      brewfile = true;
+    };
+    # Define homebrew packages here if you want to manage via nix-darwin
+    # Otherwise keep your Brewfile in the repo
+    taps = [];
+    brews = [];
+    casks = [];
+  };
+  
+  # System preferences/settings
+  system.defaults = {
+    dock = {
+      autohide = true;
+      minimize-to-application = true;
+    };
+    finder = {
+      AppleShowAllExtensions = true;
+      QuitMenuItem = true;
+    };
+    NSGlobalDomain = {
+      AppleKeyboardUIMode = 3;
+      AppleShowAllExtensions = true;
+      InitialKeyRepeat = 15;
+      KeyRepeat = 2;
+      NSAutomaticCapitalizationEnabled = false;
+      NSAutomaticDashSubstitutionEnabled = false;
+      NSAutomaticPeriodSubstitutionEnabled = false;
+      NSAutomaticQuoteSubstitutionEnabled = false;
+      NSAutomaticSpellingCorrectionEnabled = false;
+    };
+  };
+}
\ No newline at end of file
diff --git a/nix/example-host.nix b/nix/example-host.nix
new file mode 100644
index 0000000..a1f4389
--- /dev/null
+++ b/nix/example-host.nix
@@ -0,0 +1,32 @@
+# This is an example file showing how to create host-specific configurations
+# Copy this file and rename it to your hostname.nix to customize your setup
+{ config, pkgs, ... }:
+
+{
+  # Import the base configuration
+  imports = [ ./darwin-configuration.nix ];
+
+  # Override or add settings specific to this machine
+  environment.systemPackages = with pkgs; [
+    # Add host-specific packages here
+  ];
+
+  # Host-specific system preferences
+  system.defaults = {
+    # Override or extend system preferences for this host
+  };
+
+  # Host-specific homebrew configuration
+  homebrew = {
+    # You can override the base homebrew configuration here
+    taps = [
+      # Host-specific taps
+    ];
+    brews = [
+      # Host-specific brews
+    ];
+    casks = [
+      # Host-specific casks
+    ];
+  };
+}
\ No newline at end of file
diff --git a/nix/home.nix b/nix/home.nix
new file mode 100644
index 0000000..f7c6f09
--- /dev/null
+++ b/nix/home.nix
@@ -0,0 +1,54 @@
+{ config, pkgs, ... }:
+
+{
+  # Home Manager needs a bit of information about you and the
+  # paths it should manage.
+  home.username = builtins.getEnv "USER";
+  home.homeDirectory = builtins.getEnv "HOME";
+  
+  # Let Home Manager install and manage itself.
+  programs.home-manager.enable = true;
+
+  # Fish shell configuration
+  programs.fish = {
+    enable = true;
+    interactiveShellInit = ''
+      # Add any fish shell configuration here
+      # This will complement the existing fish config
+    '';
+    plugins = [
+      # You can add fish plugins here
+    ];
+  };
+  
+  # Starship prompt
+  programs.starship = {
+    enable = true;
+    enableFishIntegration = true;
+  };
+  
+  # Git configuration
+  programs.git = {
+    enable = true;
+    userName = "Your Name"; # Customize this
+    userEmail = "your.email@example.com"; # Customize this
+    delta = {
+      enable = true;
+    };
+  };
+  
+  # Packages that should be installed to the user profile
+  home.packages = with pkgs; [
+    # CLI tools
+    atuin
+    zoxide
+    fzf
+    navi
+    # Add other packages you want installed
+  ];
+  
+  # This value determines the Home Manager release that your
+  # configuration is compatible with. The recommended approach is
+  # to not set it and let Home Manager figure out the appropriate version.
+  home.stateVersion = "23.11";
+}
\ No newline at end of file