NixOS Flake Configuration

Modular NixOS configuration using flake-parts with the dendritic pattern.

Structure

.
├── aspects/           # Reusable NixOS/home-manager modules (dendritic)
│   ├── base/          # Base system configuration
│   ├── hosts/         # Host-specific configurations
│   │   ├── _alexandria/
│   │   ├── _io/
│   │   ├── _rotterdam/
│   │   └── _trantor/
│   ├── systems/       # System type modules (base, desktop, server, cli, gaming)
│   └── users/         # User account configurations
├── data/              # Shared host/service definitions
├── packages/          # Custom packages and overlays
├── secrets/           # agenix-encrypted secrets
├── shells/            # Dev shells
└── terranix/          # Terraform configurations for cloud resources

Hosts

Host	Architecture	Type	Description
trantor	aarch64-linux	server	ARM server running Forgejo, Vaultwarden, Fusion and Pocket-ID; reverse proxy for Nextcloud
alexandria	x86_64-linux	server	x86 server (Nextcloud, Jellyfin, Unbound)
rotterdam	x86_64-linux	desktop	Main workstation for gaming (also runs AI, dev and VM aspects)
io	x86_64-linux	desktop	Workstation (dev, VMs, AI)

Services

Public services are exposed through trantor's nginx (DNS is pointed at trantor); Nextcloud runs in a container on alexandria and is proxied via trantor.

Service	Domain	Host	Access
Forgejo	git.baduhai.dev	trantor	Public
Vaultwarden	pass.baduhai.dev	trantor	Public
Pocket-ID (SSO)	auth.baduhai.dev	trantor	Public
Nextcloud	cloud.baduhai.dev	alexandria	Public
Jellyfin	jellyfin.baduhai.dev	alexandria	LAN/Tailscale
Fusion (RSS)	rss.baduhai.dev	trantor	LAN/Tailscale

Features

• Ephemeral root: Automatic btrfs subvolume rollover with impermanence
• Secrets: Managed via agenix with age encryption
• Disk management: disko for declarative disk partitioning
• Modular architecture: Each aspect is a separate module imported via import-tree
• Dendritic pattern: Aspects are imported as a unified flake module
• Theming: Stylix for consistent colorschemes across hosts

Building

# Build specific host
nix build .#nixosConfigurations.trantor.config.system.build.toplevel

# Apply config on the host
nixos apply

# Apply home-manager on desktop hosts
hm apply

Terranix

Terraform configurations for cloud infrastructure managed via terranix:

• baduhai.dev and kernelpanic.space DNS on Cloudflare
• VPS provisioning on OCI
• Tailscale tailnet configuration

Key Dependencies

• nixpkgs (nixos-unstable default; nixos-26.05 for servers, nixos-26.05-small for the Nextcloud container)
• home-manager
• agenix
• disko
• impermanence
• nixos-cli
• nix-flatpak
• stylix
• terranix