This repository contains the Nix / NixOS configuration for all of my systems. See nixos-flake if you want to create your own configuration from scratch.

To use this repository as base configuration for your new machine running:

• Install NixOS
  • Hetzner dedicated from Linux Rescue system: https://github.com/numtide/nixos-anywhere (see blog post; example PR: srid#35 where I had to configure networking manually)
    • Copy from existing configuration (eg: ax41.nix)
    • Make networking configuration changes.
    • Run nixos-anywhere from a Linux system, targetting root@<ip>
    • Wait for reboot; ssh srid@<ip>; profit!
  • Digital Ocean
    • Legacy/manual approach: nixos-infect
    • Modern/automate approach: Custom image + colerama; cf. Zulip and example
  • X1 Carbon: https://srid.ca/x1c7-install
  • Windows (via WSL): https://github.com/nix-community/NixOS-WSL
• Clone this repo anywhere
• Edit flake.nix to use your system hostname as a key of the nixosConfigurations set
• Edit users/config.nix to contain your users
• Run nix run. That's it. Re-open your terminal.

• Install Nix
• Clone this repo anywhere
• Edit flake.nix to use your system hostname as a key of the darwinConfigurations set
• Edit users/config.nix to contain your users
• Run nix run.¹ That's it. Re-open your terminal.

Start from flake.nix (see Flakes). flake-parts is used as the module system.

• home: home-manager config (shared between Linux and macOS)
• nixos: nixos modules for Linux
• nix-darwin: nix-darwin modules for macOS
• users: user information
• systems: top-level configuration.nix('ish) for various systems

• To update NixOS (and other inputs) run nix flake update
  • You may also update a subset of inputs, e.g.

    nix flake lock --update-input nixpkgs --update-input darwin --update-input home-manager
    # Or, `nix run .#update`

• To free up disk space,

  sudo nix-env -p /nix/var/nix/profiles/system --delete-generations +2
  sudo nixos-rebuild boot

• To autoformat the project tree using nixfmt(rfc-style) run nix fmt.
• To build all flake outputs (locally or in CI), run nix --accept-flake-config run github:juspay/omnix ci build
• For secrets management, I use ragenix.

If you wish to discuss about this config, join the Zulip.

Using nixos-infect (Successful on Ubuntu 24.04 LTS x64)

To install Manually,

  curl https://raw.githubusercontent.com/elitak/nixos-infect/master/nixos-infect | NIX_CHANNEL=nixos-23.05 bash -x

Or Automatically using Cloud-Init User-Data,

#!/bin/sh

curl https://raw.githubusercontent.com/elitak/nixos-infect/master/nixos-infect | NIX_CHANNEL=nixos-23.05 bash

After nix is instantiated, change and update nix channels.

nix-channel --add https://channels.nixos.org/nixos-24.05 nixos
nix-channel --add https://channels.nixos.org/nixos-unstable nixos-unstable
nix-channel --update

And then bootstrap with manual script ./manual_scripts/init-configuration.nix.

nixos-rebuild switch

After bootstrapping, install further with flake configs with created user.

mkdir -p ~/repos/nixos/config && cd $_

git clone https://github.com/testfailed/nixos-config-srid
cd nixos-config-srid

nixos-rebuild switch

• Learn Nix the Fun Way

Build into the nix store.

nix-build ./examples/what-is-my-ip.nix

# Visualize the dependency graph.
nix-store --query --graph $(nix-build ./examples/what-is-my-ip.nix) | \
  dot -Tsvg -o what-is-my-ip-deps.svg

Build and include in a shell environment.

nix-shell ./examples/what-is-my-ip-shell.nix

Build into a docker image and run it.

docker load < $(nix-build ./examples/what-is-my-ip-docker.nix)
# => Loaded image: what-is-my-ip-docker:c9g6x30invdq1bjfah3w1aw5w52vkdfn

docker run -it --rm what-is-my-ip-docker:c9g6x30invdq1bjfah3w1aw5w52vkdfn