Gonzalo NixOS configuration

Usage

Install NixOS, clone the repository inside /etc/nixos, create a configuration.nix file pointing to the target machine configuration.

MACHINE='gonzalo-dell'
cat <<NIX >/etc/nixos/configuration.nix

{ config, pkgs, options, ... }: {
  imports =
    [
    	"/etc/nixos/machines/${MACHINE}.nix"
    ];
}
NIX

Run nixos-rebuild to apply changes.

sudo nixos-rebuild switch --flake .#{hostname}

Tools to transition to flake:

• https://blog.nobbz.dev/posts/2022-12-12-getting-inputs-to-modules-in-a-flake/
• https://www.youtube.com/watch?v=AGVXJ-TIv3Y

Architecture

flake.nix
 ├─ ./configuration.nix
 │   └─ machines/gonzalo-dell.nix
 │      └─ machines/gonzalo-dell-hardware.nix  
 │      └─ modules/
 │      │    ├─ virtualization.nix
 │      │    └─ virtualbox.nix #not used
 │      └─ system/
 │      │    ├─ apps.nix # Stable Applications installed
 │      │    ├─ unstable-apps.nix # Unstable Applications installed
 │      │    └─ commons.nix 
 │      └─ declaratives/
 │      │    ├─ unstable.nix # to make unstable available
 │      │    └─ python.nix # not used
 │
 ├─ ./cachix.nix
 ├─ ./cachix/
 │   └─getseadaltas.nix
 │ 
 └─ ./home
     ├─ zsh.nix
     ├─ discord.nix
     ├─ vscode.nix
     └─ git.nix

setfacl -Rm u:[user]:rwx /etc/nixos/
code /etc/nixos

Tutorials

• How to manage channels and paths in flakes: https://ayats.org/blog/channels-to-flakes
  • Example: https://github.com/viperML/nix-common/blob/master/modules/nixos/channels-to-flakes.nix
  • Example: https://github.com/viperML/nix-common/blob/master/modules/home-manager/channels-to-flakes.nix
• How to manage multiple inputs in flakes: https://blog.nobbz.dev/posts/2022-12-12-getting-inputs-to-modules-in-a-flake/
• How to manage multiple inputs in flakes with overlays: nix-community/home-manager#1538
• How to start and understand flakes: https://www.youtube.com/watch?v=AGVXJ-TIv3Y
• Flakes first steps: https://blog.kubukoz.com/flakes-first-steps/
• Nix shells and nix Develop article: https://blog.ysndr.de/posts/guides/2021-12-01-nix-shells/
• Nix intro: https://ayats.org/blog/nix-intro
• Nix installation community: https://nix-community.github.io/home-manager/index.html#ch-nix-flakes
• nixpkgs vs import inputs: https://discourse.nixos.org/t/using-nixpkgs-legacypackages-system-vs-import/17462

Examples

• https://github.com/michaelpj/nixos-config
• https://github.com/JorelAli/nixos/blob/master/configuration.nix
• https://github.com/NobbZ/nixos-config
• https://github.com/MatthiasBenaets/
• https://github.com/viperML

TODO

• Move registry, nixPaths, homemanager to different modules. Can try out flakes.parts as well.
• Make cachix work to cache build.
• Move pkgs configuration to modules, as it's evil to pass it to nixosSystem: https://discourse.nixos.org/t/allowunfree-predicate-does-not-apply-to-self-packages/21734/37
• Update initial part of README.md