nix-config

Personal NixOS and Home Manager configurations for multiple systems, managed with Nix flakes.

Overview

This repository contains declarative configurations for my development environments and systems:

• Khazad-dum: Framework 16" laptop running Arch Linux with Home Manager, featuring Hyprland and GNOME
• Valinor: NixOS homelab server with full system configuration

Features

• Flake-based configuration for reproducibility
• Modular design with reusable components
• Home Manager integration for user environment management
• Secrets management with sops-nix
• Custom Neovim configuration via nixvim
• Hyprland window manager setup with hyprlock
• Terminal multiplexer (Zellij) and emulator (Alacritty) configurations
• Shell environment with custom tooling (ashell)

Quick Start

Prerequisites

• Nix with flakes enabled
• For Home Manager configurations: nh utility (Nix Helper)
• For secrets: sops-nix setup with appropriate keys

Building Configurations

Khazad-dum (Home Manager)

# Build configuration
nh home build -c Khazad-dum

# Build and activate
nh home switch -c Khazad-dum

Valinor (NixOS)

# Build system configuration
nh os build

# Build and activate
nh os switch

Updating Dependencies

# Update all flake inputs
nix flake update

# Update specific input
nix flake lock --update-input nixpkgs

Cleaning Up

# Clean old generations and optimize Nix store
nh clean all

# Clean only user profile
nh clean user

# Clean only system profile
nh clean system

Directory Structure

nix-config/
├── flake.nix                 # Main flake configuration
├── flake.lock                # Locked dependency versions
├── .sops.yaml                # Secrets configuration
├── hosts/                    # Host-specific configurations
│   ├── khazad-dum/          # Framework laptop
│   │   ├── home.nix         # Home Manager entry point
│   │   ├── modules.nix      # Enabled modules
│   │   ├── packages.nix     # User packages
│   │   └── services.nix     # User services
│   └── valinor/             # NixOS server
│       ├── configuration.nix
│       ├── hardware-configuration.nix
│       ├── packages.nix
│       ├── services.nix
│       ├── systemd.nix
│       ├── users.nix
│       ├── locales.nix
│       └── home-manager/
├── modules/                  # Shared modules
│   ├── home-manager/        # Home Manager modules
│   │   ├── alacritty.nix   # Terminal emulator
│   │   ├── ashell.nix      # Shell environment
│   │   ├── git.nix         # Git configuration
│   │   ├── hyprland.nix    # Hyprland WM
│   │   ├── hyprlock.nix    # Lockscreen
│   │   ├── ssh.nix         # SSH client
│   │   ├── swaync/         # Notifications
│   │   └── zellij/         # Terminal multiplexer
│   ├── nh.nix              # nh utility
│   ├── nvidia.nix          # NVIDIA drivers
│   └── passthrough.nix     # GPU passthrough
└── secrets/                 # Encrypted secrets

System Configurations

Khazad-dum

Framework 16" laptop configuration running on Arch Linux (non-NixOS) with Home Manager.

Environment:

• OS: Arch Linux
• WM: Hyprland (primary) / GNOME
• Display Manager: GDM or hyprlock
• Terminal: Alacritty
• Shell: Custom ashell configuration
• Multiplexer: Zellij
• Editor: Neovim (nixvim)

Special Features:

• nixGL for OpenGL support on non-NixOS
• Hyprland keybinds including suspend/hibernate
• Notification system with swaync

Valinor

NixOS server configuration for homelab/production use.

Environment:

• OS: NixOS
• Purpose: Server/homelab
• Configuration: Full system + Home Manager

Flake Inputs

Input	Version	Description
nixpkgs	25.05	Stable NixOS packages
nixpkgs-unstable	unstable	Latest packages
home-manager	25.05	Stable Home Manager
home-manager-unstable	unstable	Latest Home Manager
sops-nix	latest	Secrets management
nixvim	custom	Personal Neovim config
nixGL	latest	OpenGL for non-NixOS
zjstatus	latest	Zellij status bar

Secrets Management

Secrets are encrypted using sops-nix:

1. Configure age keys in .sops.yaml
2. Store encrypted secrets in secrets/
3. Reference secrets in configurations
4. Secrets are automatically decrypted at build time

Development

Making Changes

1. Edit configuration files
2. Test build without activating:

   nh home build -c Khazad-dum  # or nh os build

3. Review changes
4. Activate configuration:

   nh home switch -c Khazad-dum  # or nh os switch

5. Commit to version control

Adding Modules

1. Create module in modules/home-manager/ or modules/
2. Import module in host configuration
3. Configure module options as needed

Managing Secrets

1. Create/edit secret file
2. Encrypt with sops:

   sops secrets/filename.yaml

3. Reference in configuration
4. Rebuild system

Resources

• NixOS Manual
• Home Manager Manual
• Nix Flakes
• sops-nix

License

See LICENSE file for details.