Overlay

bun2nix provides an overlay which places the bun2nix binary (along with it's passthru functions) into pkgs for ease of use, where you can then use it in your devShell or with pkgs.callPackage, etc.

Usage

Set up the bun2nix overlay as follows:

Add the overlay

Instantiate pkgs with the bun2nix attribute included:

{ bun2nix, nixpkgs, ... }:
let
  pkgs = import inputs.nixpkgs {
    inherit system;
    overlays = [ inputs.bun2nix.overlays.default ];
  };
in
{ ... }

Use bun2nix from pkgs

Use your freshly overlaid pkgs to build a bun2nix project:

{ pkgs, ... }:
pkgs.stdenv.mkDerivation {
  pname = "react-website";
  version = "1.0.0";

  src = ./.;

  nativeBuildInputs = [
    pkgs.bun2nix.hook
  ];

  bunDeps = pkgs.bun2nix.fetchBunDeps {
    bunNix = ./bun.nix;
  };

  buildPhase = ''
    bun run build \
      --minify
  '';

  installPhase = ''
    mkdir -p $out/dist

    cp -R ./dist $out
  '';
}

Or, to add the bun2nix binary to your devShell:

# In your flake.nix
{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    bun2nix.url = "github:nix-community/bun2nix";
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, bun2nix, flake-utils }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs {
          inherit system;
          overlays = [ bun2nix.overlays.default ];
        };
      in
      {
        devShells.default = pkgs.mkShell {
          packages = with pkgs; [
            bun
            bun2nix
          ];
        };
      }
    );
}