NixOS Configuration

Flake-based NixOS configurations for dayman, nightman, and lab, with shared system modules and Home Manager environments.

Hosts

Host	Role	Hardware	Notable configuration
dayman	Laptop	Intel CPU, NVIDIA GPU	NVMe (Disko), TLP, Thunderbolt, lid controls
nightman	Desktop	AMD CPU, NVIDIA GPU	NVMe and additional drives, triple monitors, virtualization
lab	SBC / lab box	—	SATA (Disko), minimal Hyprland; firewall disabled

testvm is a throwaway GNOME VM target for testing host configurations; it is not a physical host.

Agent tooling

Claude Code, OpenCode, Codex, OMP, Herdr, and Orca are managed with Home Manager. Shared skills live in home/modules/agent-skills/skills/ and are linked for supported agents. ai-usagebar provides Claude and Codex usage in Waybar; OpenCode Go is available when configured.

NetBird clients use a loopback DNS listener on 127.0.0.153:53 so Tailscale's CGNAT filtering does not block local DNS replies. The NetBird service needs CAP_NET_BIND_SERVICE to bind that port.

Commands

just update                 # Update flake inputs
just build <host>           # Build a host without applying it
just switch                 # Apply the current host configuration
just deploy <host> <ip>     # Deploy to a remote host
just testvm <host>          # Build and boot a host configuration in a throwaway VM
just testvm-headless <host> # Same, headless with SSH on a forwarded port
just buildvm <host>         # Build and run the VM
just testvm-build <host>    # Build the VM only; do not run it

For initial setup, clone the repository, configure the machine's hardware, and build the intended host before applying it. Only switch a configuration when authorized and appropriate for that machine. Change the default password immediately with passwd.

Garbage collection runs daily with three-day retention.

Each host's system.stateVersion is set at installation and should not be changed during routine upgrades; it does not indicate the current NixOS release.

Structure

.
├── flake.nix              # Flake entry point and host definitions
├── nix/
│   ├── <host>.configuration.nix
│   ├── modules/           # Shared system modules
│   ├── disks/             # Disko layouts
│   ├── hardware/          # Host hardware configuration
│   ├── profiles/          # Reusable system profiles
│   └── users/             # User definitions
└── home/
    ├── <host>.nix         # Host Home Manager configuration
    ├── modules/            # Home Manager modules
    ├── configs/            # Application dotfiles
    ├── scripts/
    └── wallpapers/