diff --git a/flake.nix b/flake.nix
index 2f0bf59..5297668 100644
--- a/flake.nix
+++ b/flake.nix
@@ -310,5 +310,17 @@
           inputs.home-manager.darwinModules.home-manager
         ];
       };
+
+      darwinConfigurations.sergio = inputs.darwin.lib.darwinSystem rec {
+        inherit inputs;
+
+        system = "x86_64-darwin";
+
+        modules = [
+          ({ pkgs, ... }: { nixpkgs.overlays = mkOverlays system; })
+          ./machines/sergio
+          inputs.home-manager.darwinModules.home-manager
+        ];
+      };
     };
 }
diff --git a/machines/sergio/default.nix b/machines/sergio/default.nix
new file mode 100644
index 0000000..6901326
--- /dev/null
+++ b/machines/sergio/default.nix
@@ -0,0 +1,127 @@
+{ config, pkgs, ... }:
+
+{
+  # List packages installed in system profile. To search by name, run:
+  # $ nix-env -qaP | grep wget
+
+  # allow zsh as a login shell
+  environment.shells = [ pkgs.zsh ];
+  programs.zsh.enable = true;
+
+  # nix.package = pkgs.nixUnstable;
+  nix.settings.allowed-users = [ "brianhicks" "root" ];
+  nix.settings.trusted-users = [ "brianhicks" "root" ];
+
+  # Used for backwards compatibility, please read the changelog before changing.
+  # $ darwin-rebuild changelog
+  system.stateVersion = 4;
+
+  # You should generally set this to the total number of logical cores in your system.
+  # $ sysctl -n hw.ncpu
+  services.nix-daemon.enable = true;
+  nix.settings.max-jobs = 20;
+  nix.settings.cores = 20;
+  nix.configureBuildUsers = true;
+
+  # use nixbuild.net for distributed builds
+  # nix.distributedBuilds = true;
+  # nix.buildMachines = [{
+  #   hostName = "eu.nixbuild.net";
+  #   system = "x86_64-linux";
+  #   maxJobs = 100;
+  #   supportedFeatures = [ "benchmark" "big-parallel" ];
+  # }];
+  # nix.extraOptions = ''
+  #   builders-use-substitutes = true
+  #   experimental-features = nix-command flakes
+  # '';
+  # programs.ssh.knownHosts = {
+  #   nixBuild = {
+  #     hostNames = [ "eu.nixbuild.net" ];
+  #     publicKey =
+  #       "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPIQCZc54poJ8vqawd8TraNryQeJnvH1eLpIDgbiqymM";
+  #   };
+  # };
+
+  homebrew = {
+    enable = true;
+
+    casks = [
+      "1password"
+      "alloy"
+      "anki"
+      "autodesk-fusion360"
+      "firefox"
+      "freecad"
+      "google-chrome"
+      "gpg-suite"
+      "hammerspoon"
+      "prusaslicer"
+      "shortcat"
+      "signal"
+      "slack"
+      "spotify"
+      "steam"
+      "wezterm"
+      "xbar"
+      "zoom"
+      "zulip"
+    ];
+  };
+
+  # dotfiles
+  home-manager = {
+    useUserPackages = true;
+    users.brianhicks = { ... }: {
+      # nixpkgs inside the Darwin home-manager is different than the nixpkgs that
+      # gets sent down from the flake. Why? No clue. It's frustrating TBH; it
+      # doesn't work this way on Linux! Anyway, the workaround is simple enough:
+      # set the things we care about inside home-manager explicitly.
+      nixpkgs.config = pkgs.config;
+      nixpkgs.overlays = pkgs.overlays;
+
+      home.sessionVariables.NIX_PATH = "nixpkgs=${pkgs.path}:$NIX_PATH";
+
+      home.packages = [
+        pkgs.xbar-pr-status
+        pkgs.xbar-review-request-status
+        pkgs.nix-tree
+        pkgs.pstree
+      ];
+
+      imports = [
+        ../../dotfiles/alacritty
+        ../../dotfiles/bat
+        ../../dotfiles/cachix
+        ../../dotfiles/comma
+        ../../dotfiles/direnv
+        ../../dotfiles/dog
+        ../../dotfiles/fd
+        ../../dotfiles/fzf
+        ../../dotfiles/git
+        ../../dotfiles/hammerspoon
+        ../../dotfiles/helix
+        ../../dotfiles/home-manager
+        ../../dotfiles/htop
+        ../../dotfiles/hyperfine
+        ../../dotfiles/jq
+        ../../dotfiles/k9s
+        ../../dotfiles/kakoune
+        ../../dotfiles/lf
+
+        # ncdu currently does not compile!
+        ../../dotfiles/ncdu
+        ../../dotfiles/niv
+        ../../dotfiles/ripgrep
+        ../../dotfiles/sd
+        ../../dotfiles/ssh
+        ../../dotfiles/tmux
+        ../../dotfiles/tree
+        ../../dotfiles/tree-grepper
+        ../../dotfiles/watch
+        ../../dotfiles/wezterm
+        ../../dotfiles/zsh
+      ];
+    };
+  };
+}