codex-overlay.nix

final: prev:
let
  codexFlake = builtins.getFlake "github:sadjow/codex-cli-nix";
in
codexFlake.overlays.default final prev

configuration.nix

# Edit this configuration file to define what should be installed on
# your system. Help is available in the configuration.nix(5) man page, on
# https://search.nixos.org/options and in the NixOS manual (`nixos-help`).

{ config, lib, pkgs, ... }:

let
  pkgsUnstable = import <nixos-unstable> {
    config = config.nixpkgs.config;
  };
in
{
  nix.settings.experimental-features = [ "nix-command" "flakes" ];

  imports = [
    <nixos-wsl/modules>
  ];

  nixpkgs.overlays = [
    (import ./codex-overlay.nix)
  ];

  wsl.enable = true;
  wsl.defaultUser = "nixos";

  programs.git.enable = true;
  programs.fish.enable = true;

  programs.gnupg.agent = {
    enable = true;
    pinentryPackage = pkgs.pinentry-curses;
  };

  environment.systemPackages =
    (with pkgs; [
      helix
      starship
      nixd
      # ai tools
      codex
      # cli tools
      ripgrep
      eza
      jujutsu
      jjui
      gitui
      bottom
      gnupg
      delta
      fd
      dust
      bat
      procs
      difftastic
    ]) ++
    (with pkgsUnstable; [
      sd
      go
      gopls
      gofumpt
      scala
      scalafmt
      scalafix
      kotlin
      kotlin-native
      odin
      zig
      rustup
      # node / typescript
      pnpm
      bun
      deno
      # c & c++
      meson
      cmake
      clang_22
      # debuggers
      lldb
      rr
      # elixir
      beamMinimal28Packages.elixir
      beamMinimal28Packages.elixir-ls
      # haxe
      # haxe
      # ocaml
      ocaml
      python3
      uv
      julia
      dotnet-sdk_11
      dotnet-sdk_10
    ]);

  users.users.nixos.shell = pkgs.fish;

  # This value determines the NixOS release from which the default
  # settings for stateful data, like file locations and database versions
  # on your system were taken. It's perfectly fine and recommended to leave
  # this value at the release version of the first install of this system.
  # Before changing this value read the documentation for this option
  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
  system.stateVersion = "25.11"; # Did you read the comment?
}