diff --git a/configuration.nix b/configuration.nix
new file mode 100644
index 0000000..ad47511
--- /dev/null
+++ b/configuration.nix
@@ -0,0 +1,46 @@
+{ pkgs, inputs, ... }:
+{
+  imports = [./nix.nix];
+  security.pam.enableSudoTouchIdAuth = true;
+  system = {
+    defaults = {
+      dock = {
+        appswitcher-all-displays = false;
+        autohide = true;
+        magnification = true;
+        mru-spaces = false;
+        orientation = "bottom";
+        wvous-bl-corner = 13;
+        wvous-br-corner = 14;
+        wvous-tl-corner = 2;
+        wvous-tr-corner = 3;
+      };
+      finder = {
+        AppleShowAllExtensions = true;
+        FXPreferredViewStyle = "Nlsv";
+      };
+      NSGlobalDomain = {
+        AppleEnableMouseSwipeNavigateWithScrolls = true;
+        AppleEnableSwipeNavigateWithScrolls = true;
+        AppleICUForce24HourTime = true;
+        AppleInterfaceStyle = "Dark";
+        AppleInterfaceStyleSwitchesAutomatically = false;
+        NSAutomaticCapitalizationEnabled = false;
+        NSAutomaticDashSubstitutionEnabled = true;
+        NSAutomaticSpellingCorrectionEnabled = false;
+        NSAutomaticPeriodSubstitutionEnabled = false;
+        NSAutomaticQuoteSubstitutionEnabled = true;
+        _HIHideMenuBar = true;
+      };
+      trackpad = {
+        Clicking = true;
+        TrackpadRightClick = true;
+      };
+    };
+    keyboard = {
+      enableKeyMapping = true;
+      remapCapsLockToControl = true;
+    };
+    stateVersion = 4;
+  };
+}
diff --git a/flake.lock b/flake.lock
index fef538e..36aa702 100644
--- a/flake.lock
+++ b/flake.lock
@@ -101,6 +101,26 @@
         "type": "github"
       }
     },
+    "nix-darwin": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1700795494,
+        "narHash": "sha256-gzGLZSiOhf155FW7262kdHo2YDeugp3VuIFb4/GGng0=",
+        "owner": "LnL7",
+        "repo": "nix-darwin",
+        "rev": "4b9b83d5a92e8c1fbfd8eb27eda375908c11ec4d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "LnL7",
+        "repo": "nix-darwin",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1705883077,
@@ -125,6 +145,7 @@
         "flake-compat": "flake-compat",
         "home-manager": "home-manager",
         "monaspace-font": "monaspace-font",
+        "nix-darwin": "nix-darwin",
         "nixpkgs": "nixpkgs"
       }
     }
diff --git a/flake.nix b/flake.nix
index 3c72bc9..9b55c3e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -3,6 +3,10 @@
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs?rev=5f5210aa20e343b7e35f40c033000db0ef80d7b9";
+    nix-darwin = {
+      url = "github:LnL7/nix-darwin";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
     home-manager = {
       url = "github:nix-community/home-manager";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -29,25 +33,33 @@
     };
   };
 
-  outputs = inputs@{ nixpkgs, home-manager, ... }:
+  outputs = inputs@{ self, nixpkgs, nix-darwin, home-manager, ... }:
     let
       system = "x86_64-darwin";
       pkgs = import nixpkgs {
         inherit system;
         config = { allowUnfree = true; };
       };
-    in {
-      homeConfigurations.abhinav = home-manager.lib.homeManagerConfiguration {
-        inherit pkgs;
-        modules = [ ./home.nix ];
-        extraSpecialArgs = { inherit inputs; };
+    in
+    {
+      darwinConfigurations."Abhinavs-MacBook-Pro" = nix-darwin.lib.darwinSystem {
+        inherit system;
+        specialArgs = { inherit inputs; };
+        modules = [
+          ./configuration.nix
+          home-manager.darwinModules.home-manager
+          {
+            home-manager.useGlobalPkgs = true;
+            home-manager.useUserPackages = true;
+            home-manager.users.abhinav = import ./home.nix;
+            home-manager.extraSpecialArgs = { inherit inputs; };
+          }
+        ];
       };
       devShells.${system}.default = pkgs.mkShell {
         buildInputs = with pkgs; [ (import home-manager { inherit pkgs; }).home-manager just ];
         shellHook = ''
-          export NIX_PATH=$HOME/.hm-nixchannels;
-          mkdir -p $NIX_PATH;
-          ln -f -s ${pkgs.path} -T $NIX_PATH/nixpkgs;
+          export NIXPKGS_PATH=${pkgs.path};
         '';
       };
     };
diff --git a/home.nix b/home.nix
index 792e748..e470b29 100644
--- a/home.nix
+++ b/home.nix
@@ -1,11 +1,12 @@
-{ config, pkgs, ... }:
+{ config, pkgs, lib, ... }:
 
-{
-  imports = [ ./programs ./scripts ./launchd.nix ./nix.nix ];
+let username = config.home.username;
+in {
+  imports = [ ./programs ./scripts ./launchd.nix ];
 
   home = {
     username = "abhinav";
-    homeDirectory = "/Users/abhinav";
+    homeDirectory = lib.mkForce "/Users/${username}";
     stateVersion = "22.05";
     enableNixpkgsReleaseCheck = true;
 
@@ -23,7 +24,7 @@
 
     sessionVariables = {
       EDITOR = "micro";
-      NIX_PATH = "$HOME/.hm-nixchannels";
+      NIX_PATH = "/nix/var/nix/profiles/per-user/${username}/channels";
     };
 
     file."Applications/Home Manager Apps".source = let
diff --git a/justfile b/justfile
index 65fe1ac..29cd659 100644
--- a/justfile
+++ b/justfile
@@ -1,5 +1,6 @@
 in_nix_shell := env_var_or_default("IN_NIX_SHELL", "false")
 root_dir := justfile_directory()
+hostname := `scutil --get LocalHostName`
 
 # choose a just command to run
 default:
@@ -18,24 +19,21 @@ _run cmd:
     fi
 
 _build:
-    home-manager -v build --flake "{{ root_dir }}#abhinav"
+    nix build {{ root_dir }}#darwinConfigurations.{{ hostname }}.system
 
 # build latest home-manager generation
 build: (_run "_build")
 
-_switch:
-    home-manager -v switch --flake "{{ root_dir }}#abhinav"
-    report-hm-changes
+_switch: _build
+    ./result/sw/bin/darwin-rebuild -v switch --flake "{{ root_dir }}"
 
 # switch to latest home-manager generation
 switch: (_run "_switch")
 
-_update-vscode-extensions:
-    $NIX_PATH/nixpkgs/pkgs/applications/editors/vscode/extensions/update_installed_exts.sh > \
-        {{ root_dir }}/programs/vscode/extensions.nix
-
-_update: _update-vscode-extensions && _switch
+_update: && _switch
     nix flake update --commit-lock-file "{{ root_dir }}"
+    $NIXPKGS_PATH/pkgs/applications/editors/vscode/extensions/update_installed_exts.sh > \
+        {{ root_dir }}/programs/vscode/extensions.nix
 
 # update packages and switch
 update: (_run "_update")
diff --git a/nix.nix b/nix.nix
index ee104d4..b1dd205 100644
--- a/nix.nix
+++ b/nix.nix
@@ -1,19 +1,36 @@
-{ config, pkgs, ... }:
-
+{ config, pkgs, inputs, ... }:
 {
-  nixpkgs.config.allowUnfree = true;
-  nix.package = pkgs.nixStable;
-  nix.settings = {
-    experimental-features = [ "nix-command" "flakes" "repl-flake" ];
-    max-jobs = 6;
-    cores = 2;
-    auto-optimise-store = true;
-    connect-timeout = 5;
-    log-lines = 25;
-    min-free = 128000000;
-    max-free = 1000000000;
-    fallback = true;
-    warn-dirty = false;
-    keep-outputs = true;
+  services.nix-daemon.enable = true;
+  nix = {
+    package = pkgs.nixFlakes;
+    registry.nixpkgs.flake = inputs.nixpkgs;
+    nixPath = [{ nixpkgs = inputs.nixpkgs.outPath; }];
+    extraOptions = ''
+      keep-outputs = true
+      keep-derivations = true
+    '';
+    gc = {
+      automatic = true;
+      interval.Day = 1;
+      options = "--delete-older-than 7d";
+    };
+    settings = {
+      auto-optimise-store = true;
+      connect-timeout = 5;
+      cores = 2;
+      experimental-features = [ "nix-command" "flakes" "repl-flake" ];
+      fallback = true;
+      keep-outputs = true;
+      log-lines = 25;
+      max-free = 1000000000;
+      max-jobs = 6;
+      min-free = 128000000;
+      warn-dirty = false;
+      trusted-users = ["@admin"];
+    };
+  };
+  nixpkgs = {
+    hostPlatform = "x86_64-darwin";
+    config.allowUnfree = true;
   };
 }
diff --git a/programs/fish.nix b/programs/fish.nix
index 7841a7a..cb9a115 100644
--- a/programs/fish.nix
+++ b/programs/fish.nix
@@ -1,6 +1,7 @@
 { inputs, config, pkgs, ... }:
 
-{
+let username = config.home.username;
+in {
   programs.fish = {
     enable = true;
 
@@ -29,7 +30,8 @@
     shellInit = ''
       # nix
       fenv source /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh
-      fish_add_path -m ~/.local/bin ~/.cabal/bin
+      fenv source /etc/profiles/per-user/${username}/etc/profile.d/hm-session-vars.sh
+      fish_add_path -m ~/.local/bin ~/.cabal/bin /etc/profiles/per-user/${username}/bin
     '';
   };
 }