{
  description = "devshell nix module for triton DevOps shell environment";

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

    flake-utils.url = "github:numtide/flake-utils";

    devshell.url = "github:numtide/devshell";
    devshell.inputs.nixpkgs.follows = "nixpkgs";
    devshell.inputs.flake-utils.follows = "flake-utils";
  };

  outputs = { self, flake-utils, devshell, nixpkgs }:
    # defaultSystems = ["x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin"]
    flake-utils.lib.eachDefaultSystem (system:
        let
          pkgs = import nixpkgs {
            inherit system;

            overlays = [
              devshell.overlays.default
              (import ./overlay.nix)
            ];
          };
        in
        {
          devshellModules.tritonshell = { config, lib, ... }:
            with lib;
            {
              options = {
                environment = {
                  enable = mkEnableOption "triton DevOps shell environment";
                  # options used to set triton env vars in tritonshell
                  # adjust to suit your Triton Data Center setup
                  # take a look at ./pkgs/triton-docker-env-shell.nix to see how these get used
                  cnsBaseDomain = mkOption {
                    description = "Base domain for generated CNS domain records";
                    type = types.nullOr types.str;
                    default = "greenbaum.zone";
                  };
                  dataCenters = mkOption {
                    description = "List of available triton data centers";
                    type = types.listOf types.str;
                    default = [ "cgn-1" "lev-1" ];
                  };
                  mantaDomain = mkOption {
                    description = "Domain for manta object storage service";
                    type = types.nullOr types.str;
                    default = "eu-central.manta.greenbaum.cloud";
                  };
                  tritonApiDomain = mkOption {
                    description = "Domain for triton API";
                    type = types.nullOr types.str;
                    default = "api.greenbaum.cloud";
                  };
                };
              };

              config =
                lib.mkIf config.environment.enable
                  (import ./tritonshell.nix { inherit config devshell pkgs self system; });
            };
          # Internal utility package with shell function and env vars helper.
          # These get source'd in devshell.bash.extra when starting tritonshell
          packages = {
            triton-utils = import ./pkgs/triton-utils.nix { inherit pkgs; };
            triton-docker-env = import ./pkgs/triton-docker-env.nix { inherit pkgs; };
          };
        }
      ) // {
      defaultTemplate = {
        description = "nix flake new --template 'git+https://git.greenbaum.cloud/greenbaum.cloud/tritonshell?ref=main' ./tritonshell";
        path = ./template;
      };
    };
}