{
  description = "Various packages for Nix";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    systems.url = "github:nix-systems/default";
    blueprint = {
      url = "github:numtide/blueprint";
      inputs.nixpkgs.follows = "nixpkgs";
      inputs.systems.follows = "systems";
    };
    treefmt-nix = {
      url = "github:numtide/treefmt-nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    flake-parts = {
      url = "github:hercules-ci/flake-parts";
      inputs.nixpkgs-lib.follows = "nixpkgs";
    };
    bun2nix = {
      # TODO(#4001): drop the branch pin once catalog support
      # (nix-community/bun2nix#86) reaches the default branch.
      url = "github:nix-community/bun2nix/staging-2.1.0";
      inputs.nixpkgs.follows = "nixpkgs";
      inputs.systems.follows = "systems";
      inputs.treefmt-nix.follows = "treefmt-nix";
      inputs.flake-parts.follows = "flake-parts";
    };
  };

  outputs =
    { self, ... }@inputs:
    let
      blueprintOutputs = inputs.blueprint {
        inherit inputs;
        # allowUnfree is needed for packages that depend on pre-built
        # binaries (e.g., goose-cli's librusty_v8)
        nixpkgs.config.allowUnfree = true;
      };
    in
    blueprintOutputs
    // {
      overlays = {
        default = import ./overlays {
          inherit (blueprintOutputs) packages;
        };
        shared-nixpkgs = import ./overlays/shared-nixpkgs.nix {
          inherit (blueprintOutputs) mkPackagesFor;
        };
      };

      nixosModules.default = {
        nixpkgs.overlays = [ self.overlays.default ];
      };
    };
}