nixos-config

Personal NixOS configuration using flakes and home-manager.

Structure

nixos-config/
├── flake.nix                         # Entry point — inputs and outputs
├── hosts/
│   └── nixos/
│       ├── configuration.nix         # System configuration
│       └── hardware-configuration.nix # Auto-generated, machine-specific
└── home/
    └── duynguyen/
        └── default.nix               # Home-manager config (user packages, dotfiles)

What's configured

• KDE Plasma 6 on Wayland via SDDM, Breeze Dark theme
• Niri scrollable-tiling compositor (available as a separate session at SDDM)
• Vietnamese input via fcitx5 + unikey (Telex/VNI)
  • Open fcitx5-configtool → Input Method tab → add Unikey
• Touchpad: natural scroll, acceleration 0.4, scroll factor 0.75
• Shell: zsh (default) with autosuggestions, syntax highlighting, starship prompt, zoxide
• Locale: English UI, Vietnamese formats (currency, time, etc.), Asia/Ho_Chi_Minh timezone
• Pipewire for audio
• Packages:
  • Browsers: firefox, zen-browser, claude-desktop
  • Terminals: kitty, foot
  • Editor: vscodium
  • Niri tools: fuzzel, waybar, mako, wl-clipboard
  • Daily apps: mpv, imv, grim + slurp, libreoffice, telegram-desktop
  • CLI: btop, ripgrep, fzf, eza, bat, gh
  • System: claude-code, git, kate

Reproducing on a fresh machine

1. Install NixOS

Boot the NixOS ISO, partition, and install as normal. During install, choose KDE Plasma if prompted.

2. Enable flakes temporarily

nix-shell -p git --command "bash"
# or just proceed if git is already available

3. Clone this repo

git clone <repo-url> ~/nixos-config
cd ~/nixos-config

4. Provide the hardware config

hardware-configuration.nix is machine-specific and not tracked in git. Copy the one generated by the NixOS installer:

cp /etc/nixos/hardware-configuration.nix ~/nixos-config/hosts/nixos/hardware-configuration.nix

5. Apply the configuration

sudo nixos-rebuild switch --flake ~/nixos-config#nixos

6. Lock the flake inputs

nix flake update

Commit the resulting flake.lock so future rebuilds use the exact same package versions.

Daily usage

Task	Command
Apply system + home changes	sudo nixos-rebuild switch --flake ~/nixos-config#nixos
Update all inputs	nix flake update
Roll back last switch	sudo nixos-rebuild switch --rollback
Search packages	nix search nixpkgs <name>

Adding packages

• System-wide (available to all users): hosts/nixos/configuration.nix → environment.systemPackages
• User-level (home-manager managed): home/duynguyen/default.nix → home.packages
• Per-user via NixOS: hosts/nixos/configuration.nix → users.users.duynguyen.packages

Vietnamese input setup (fcitx5)

After first build:

1. Open fcitx5-configtool
2. Go to the Input Method tab → add Unikey
3. Switch between English/Vietnamese with Super+Space

Unikey supports both Telex (default) and VNI — configure in the Unikey settings.