{
  lib,
  soonixSubmodule,
  pipelineSubmodule,
  ...
}: let
  inherit (lib) mkOption types;
in rec {
  configSubmodule = {
    options = {
      soonix = mkOption {
        description = "Configure the soonix '.gitlab-ci.yml' generation";
        type = types.submodule soonixSubmodule;
        default = {};
      };
      nixJobsByDefault = mkOption {
        description = ''
          Whether to transform all jobs to nix-configured jobs by default.
          If false, you need to set `nix.enable` for each job you want to be transformed.
        '';
        type = types.bool;
        default = true;
      };
    };
  };

  nixCiSubmodule = {config, ...}: {
    options = {
      config = mkOption {
        description = "Configuration of Nix-GitLab-CI itself";
        type = types.submodule configSubmodule;
        default = {};
      };
      pipelines = mkOption {
        description = "Defines all pipelines";
        type = types.attrsOf (types.submoduleWith {
          modules = [pipelineSubmodule];
          specialArgs.rootConfig = config.config;
        });
        default = {};
      };

      packages = mkOption {
        description = "Final packages for use in CI";
        internal = true;
        type = types.attrsOf types.package;
      };
      soonix = mkOption {
        description = "Soonix config for .gitlab-ci.yml";
        internal = true;
        type = types.attrs;
      };
    };
    config = {
      packages = lib.fold (pipeline: acc: acc // pipeline) {} (
        map (pipeline: pipeline.packages) (builtins.attrValues config.pipelines)
      );
      soonix = config.config.soonix.finalConfig;
    };
  };
}