Nix flake for macOS (nix-darwin) and NixOS

Cross-platform flake with Home Manager profiles, shared modules, and per-host overrides.

Quick start

• Prereqs: Nix with flakes enabled (export NIX_CONFIG="experimental-features = nix-command flakes").
• Clone: git clone https://github.com/sm17p/dotfiles.
• macOS apply: darwin-rebuild switch --flake .#sakatagintoki (or .#hijikatatoshiro).
• NixOS apply: sudo nixos-rebuild switch --flake .#<nixos-host>.

Bootstrap with make

• make bootstrap-mac — installs Nix, then nix-darwin using FLAKE (defaults to .#$(hostname)).
• make darwin-rebuild — rebuilds nix-darwin with the current FLAKE.
• Override host: make darwin-rebuild FLAKE=.#sakatagintoki.
• Other helpers: make flake-update, make flake-check, make nix-gc, make home-manager-switch.

Layout

• flake.nix: inputs, hosts map, mkHost dispatcher.
• hosts/: per-host settings
  • darwin/<host>/default.nix
  • nixos/<host>/{hardware-configuration.nix,default.nix}
• modules/shared: cross-platform settings (nix config, shells, common pkgs).
• modules/darwin: macOS-specific (fonts, homebrew, touch ID).
• modules/nixos: Linux-specific (placeholder; add boot/fs/impermanence here).
• home-manager/profiles: reusable stacks (common, workstation, server).
• home-manager/programs: HM modules (aliases, fish, firefox, git, tealdeer).
• pkgs/, overlays/: custom packages and overlays.

Adding a host

1. Add host metadata in flake.nix under hosts with type (darwin/nixos), system, user, modulesPath, and profiles.
2. Create hosts/<platform>/<host>/default.nix (and hardware-configuration.nix for NixOS).
3. Rebuild with darwin-rebuild switch --flake .#<host> or nixos-rebuild switch --flake .#<host>.

Home Manager profiles

• Profiles live in home-manager/profiles. Each host lists profiles in flake.nix, e.g. ["common" "workstation"].
• common includes shell/tooling (fish, starship, zoxide, atuin, carapace), aliases, catppuccin theme, and defaults.
• workstation and server are stubs to extend for GUI/headless needs.

Common tasks

• Rebuild macOS: darwin-rebuild switch --flake .#<host>.
• Rebuild NixOS: sudo nixos-rebuild switch --flake .#<host>.
• Update inputs: nix flake update.

Troubleshooting

• Attribute renames: if pkgs.system warnings appear, use pkgs.stdenv.hostPlatform.system.
• Package renames: on macOS use docker-desktop instead of docker.
• If a profile change doesn’t load, ensure the host’s profiles list in flake.nix includes it.