NixOS Configuration Repository

Work-in-progress setup

Repository Structure

This repository contains my NixOS configuration files organized into several directories:

• home/: Home manager
• machines/: Machine-specific configurations
• packages/: Custom package definitions and configs.
• profiles/: System profiles (desktop, development, etc.)
• services/: Service configurations (nginx, mysql, etc.)
• secrets/: Encrypted secrets

Quick Start

Build Configuration

nix --extra-experimental-features "nix-command flakes" build ".#nixosConfigurations.galadriel.config.system.build.toplevel"

Rebuild and Switch

The primary rebuild command is:

sudo nixos-rebuild switch --flake .# --no-write-lock-file -L --impure

This command:

• Uses the current flake
• Disables lock file writing
• Enables debug logging (-L)
• Allows impure derivations

Alternative Rebuild Methods

1. Remote Flake:

sudo nixos-rebuild switch \
  --update-input nixpkgs \
  --update-input unstable \
  --no-write-lock-file \
  --refresh \
  --flake git+https://github.com/adrlau/nix-dotfiles.git \
  --upgrade

2. Standard Local Rebuild:

sudo nixos-rebuild switch --flake .#

Dependency Inspection

Check package relationships using:

nix why-depends /run/current-system /nix/store/...
nix why-depends .#nixosConfigurations.galadriel nixpkgs#python312Packages.botorch
nix why-depends .#nixosConfigurations.eowyn.config.system.build.toplevel pkgs.python3.12-libarcus-4.12.0 --impure

show flake attrs nix flake show .#

Troubleshooting

Fix Broken Store

After aborted rebuilds:

nix-store --query --referrers-closure \
    $(find /nix/store -maxdepth 1 -type f -name '*.drv' -size 0) |
    xargs sudo nix-store --delete --ignore-liveness
sudo nix store gc
sudo nix store verify --repair --all

Viewing Logs

Check home-manager logs:

journalctl -eu home-manager-gunalx

Maintenance

Clean old generations:

sudo nix-collect-garbage --delete-older-than 4d

Notes

• This configuration is constantly evolving
• Refer to specific machine configurations in machines/ for details
• Service configurations are located in services/
• Custom packages are defined in packages/