{
  description = "Bagel cooking infrastructure";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";

    colmena.url = "github:zhaofengli/colmena";
    colmena.inputs.nixpkgs.follows = "nixpkgs";

    hydra.url = "git+https://git.lix.systems/lix-project/hydra.git";
    hydra.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs = { nixpkgs, ... } @ inputs: {
    colmena = {
      meta.nixpkgs = import nixpkgs {
        system = "x86_64-linux";
      };
      meta.specialArgs.inputs = inputs;

      bagel-box = {
        imports = [
          inputs.hydra.nixosModules.hydra

          ./services

          ./hosts/bagel-box
        ];
      };
    };
  };
}