芯 (Shin)

Personal NixOS + Home Manager flake. Builds for x86_64-linux and aarch64-linux. Uses flake-parts.

Host	Target	WM	Notes
desktop	x86_64	Niri	Full graphical
laptop	x86_64	Niri	Battery, bluetooth, location
tty	x86_64	—	Headless server
hetzner	x86_64 (24.05)	—	Isolated server, disko + sops-nix

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Quick Install (with disko — recommended)

# Boot NixOS minimal ISO, then:
sudo -i
git clone --depth 1 https://github.com/someone/shin /mnt/etc/nixos

# Auto-partition, format, mount (replace 'laptop' with 'desktop'/'tty')
nix --extra-experimental-features "nix-command flakes" \
  run github:nix-community/disko -- \
  --mode destroy,format,mount /mnt/etc/nixos/hosts/aesthetic/disko-config.nix

# Generate hardware config
nixos-generate-config --dir /mnt/etc/nixos/hosts/aesthetic
rm /mnt/etc/nixos/hosts/aesthetic/configuration.nix

# Install
cd /mnt/etc/nixos
nixos-install --flake .#laptop

BIOS vs UEFI: Set in hosts/aesthetic/default.nix:

boot.loader.limine.bootMode = "bios";  # or "uefi"

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Post-Install: Secrets

# Reboot into new system, then:
sops secrets/secrets.yaml
# Fill in:
#   hetzner_server  — SSH private key for root@severijnse.eu
#   gitea_laptop    — SSH private key for git@git.severijnse.eu:222
#   discordo, openrouter, github, twt, gemini, context7, exa — API tokens
sudo nixos-rebuild switch --flake /etc/nixos#laptop

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Daily Workflow

# Rebuild after changes
sudo nixos-rebuild switch --flake /etc/nixos#laptop

# Or with nh (cleaner)
NH_FLAKE=/etc/nixos nh os switch

# Update flake inputs
nix flake update --flake /etc/nixos

# Format Nix code
alejandra /etc/nixos

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Key Components

Layer	Tool	Config
WM	Niri	home/window-managers/niri/
Shell	Fish + Starship	home/terminal/shell/
Terminal	Ghostty	home/terminal/emulators/ghostty.nix
Panel	Noctalia	home/services/wayland/noctalia.nix
Files	Yazi	home/terminal/software/yazi.nix
Editor	Helix	home/editors/helix/
Secrets	sops-nix (age via SSH host key)	secrets/secrets.yaml
Boot	Limine (BIOS/UEFI)	system/core/limine.nix

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Flake Structure

├── flake.nix              # Inputs, outputs, perSystem
├── hosts/
│   ├── default.nix        # Host definitions (desktop, laptop, tty, hetzner)
│   └── aesthetic/         # Laptop/desktop hardware config
├── home/                  # Home Manager (user config)
│   ├── terminal/          # Shell, emulators, CLI tools
│   ├── editors/           # Helix, Zed, Neovim
│   ├── window-managers/   # Niri, keybinds
│   └── services/          # User systemd services
├── system/                # NixOS modules
│   ├── core/              # Boot, kernel, security
│   └── services/          # System services
├── servers/
│   └── hetzner/           # Isolated server (24.05, disko, sops)
├── secrets/
│   ├── secrets.yaml       # sops-encrypted (age via SSH host key)
│   ├── age.key            # Age private key (for sops decryption)
│   └── .sops.yaml         # sops creation rules
└── pkgs/                  # Custom packages/overlays

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sops-nix Details

• Encrypts secrets/secrets.yaml with age using the SSH host ed25519 key (/etc/ssh/ssh_host_ed25519_key)
• Auto-decrypts to /run/secrets/ at activation
• Fish loads secrets from /run/secrets/ via home/terminal/shell/fish.nix
• SSH config references /run/secrets/hetzner_server and /run/secrets/gitea_laptop

To re-encrypt for a new host key:

cd /etc/nixos
nix shell nixpkgs#sops -c sops --encrypt --age "$(nix shell nixpkgs#ssh-to-age -c ssh-to-age < /etc/ssh/ssh_host_ed25519_key.pub)" secrets/secrets.yaml > secrets/secrets.yaml.new
mv secrets/secrets.yaml.new secrets/secrets.yaml

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Credits

Inspired by: hjem, owl4ce, Siduck, Rxyhn.

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License

MIT — use freely, credits appreciated.