Add Darwin Host

Name: skill-add-darwin-host
Rating: 78
Author: codgician

Load fact-nix for system builders.

Required Inputs

• Host name (female Genshin character)
• Architecture: aarch64-darwin (M-series) or x86_64-darwin (Intel)
• Homebrew casks (GUI apps)
• Mac App Store apps (requires user signed in)

Key Difference from NixOS

Aspect	Darwin
Builder	`mkDarwinSystem`
stateVersion	Integer (`6`), not string
Apps	Homebrew + nixpkgs
Deploy	`darwin-rebuild switch`

Procedure

1. Create Host Directory

bash

mkdir -p hosts/darwin/<hostname>

2. Create default.nix

nix

{ lib, ... }:
lib.codgician.mkDarwinSystem {
  hostName = builtins.baseNameOf ./.;
  system = "aarch64-darwin";  # or x86_64-darwin
  modules = [ ./system.nix ];
}

3. Create system.nix

nix

{ pkgs, ... }:
{
  codgician = {
    system.common.enable = true;
    system.brew = {
      enable = true;
      casks = [ "iterm2" "visual-studio-code" ];
      masApps = { "Xcode" = 497799835; };
    };
    users.codgi.enable = true;
  };
  system.primaryUser = "codgi";
  system.stateVersion = 6;  # Integer, not string!
}

Find App Store IDs: mas search "App Name"

4. Bootstrap

Prerequisites: Nix and Homebrew installed. User signed into App Store.

bash

nix build .#darwinConfigurations.<hostname>.system
./result/sw/bin/darwin-rebuild switch --flake .

# Subsequent deploys:
darwin-rebuild switch --flake .#<hostname>

Exit Criteria

• Host directory with default.nix, system.nix
• nix flake check passes
• darwin-rebuild switch succeeds

Reference: See hosts/darwin/furina/ (Apple Silicon), hosts/darwin/raiden-ei/ (Intel).

Note: Do not commit — present changes to user.