hosts/
├── atlas/                    # Desktop gaming machine
│   ├── configuration.nix     # Main config (core + hardware + desktop + dev + gaming + services)
│   └── hardware-configuration.nix  # Hardware-specific settings
├── laptop/                   # Laptop with desktop environment
│   ├── configuration.nix     # Main config (core + hardware + desktop + dev + services)
│   └── hardware-configuration.nix  # Placeholder - generate on actual machine
└── server/                   # Headless server
    ├── configuration.nix     # Main config (core + hardware[no GPU] + dev + maintenance)
    └── hardware-configuration.nix  # Placeholder - generate on actual machine

Module Assignments

All Hosts

Core: boot, networking, users, system, localization
Development: tools, docker, shell

Atlas & Laptop Only

Hardware: GPU, audio, storage, power
Desktop: window manager, apps, theming, portals
Services: printing, avahi, maintenance (navidrome only on atlas)

Atlas Only

Gaming: steam, gamemode, wine

Server Only

Headless - no desktop or gaming
SSH enabled for remote management

Usage

Build a specific host

# Build atlas (current desktop)
nixos-rebuild switch --flake .#atlas

# Build server (once hardware-config is ready)
nixos-rebuild switch --flake .#server

# Build laptop (once hardware-config is ready)
nixos-rebuild switch --flake .#laptop

Setting up a new machine

Install NixOS on the target machine

Generate hardware config:

sudo nixos-generate-config --show-hardware-config > hardware-configuration.nix

Copy that file to hosts/<hostname>/hardware-configuration.nix in this repo
Adjust hosts/<hostname>/configuration.nix as needed

Build and switch:

nixos-rebuild switch --flake .#<hostname>

Adding a new host

Create hosts/<hostname>/ directory
Copy configuration.nix from similar host as template
Generate hardware-configuration.nix on target machine

Add to flake.nix:

nixosConfigurations.<hostname> = mkHost "<hostname>";