{

  description = "Deployment for skynet";

  inputs = {
    # gonna start off with a fairly modern base
    nixpkgs.url = "nixpkgs/nixos-unstable";

    # utility stuff
    flake-utils.url = "github:numtide/flake-utils";
    agenix.url = "github:ryantm/agenix";
    arion.url = "github:hercules-ci/arion";

    # email
    # simple-nixos-mailserver.url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-23.05";
    simple-nixos-mailserver.url = "gitlab:simple-nixos-mailserver/nixos-mailserver";

    # account.skynet.ie
    skynet_ldap_backend.url  = "gitlab:compsoc1%2Fskynet%2Fldap/backend?host=gitlab.skynet.ie";
    skynet_ldap_frontend.url = "gitlab:compsoc1%2Fskynet%2Fldap/frontend?host=gitlab.skynet.ie";

    skynet_website.url = "gitlab:compsoc1%2Fskynet%2Fwebsite/2023?host=gitlab.skynet.ie";
    skynet_website_2016.url = "gitlab:compsoc1%2Fskynet%2Fwebsite/2016?host=gitlab.skynet.ie";
  };

  outputs = { self, nixpkgs, ... } @inputs: {
    # https://github.com/zhaofengli/colmena
    # colmena apply --on agentjones
    # colmena apply --on @dns
    # nix flake lock --update-input skynet_ldap_backend
    colmena = {
      meta = {
        nixpkgs = import nixpkgs {
          system = "x86_64-linux";
          overlays = [];
        };
        specialArgs = {
          inherit inputs;
        };
      };

      # installed for each machine
      defaults = import ./machines/_base.nix ;

      # firewall machiene
      agentjones = import ./machines/agentjones.nix;

      # ns1
      vendetta = import ./machines/vendetta.nix;

      # ns2
      vigil = import ./machines/vigil.nix;

      # icecast - ULFM
      galatea = import ./machines/galatea.nix;

      # Game host
      optimus = import ./machines/optimus.nix;

      # LDAP host
      kitt = import ./machines/kitt.nix;

      # Gitlab
      glados = import ./machines/glados.nix;

      # Gitlab runners
      wheatly = import ./machines/wheatly.nix;

      # email
      gir = import ./machines/gir.nix;

      # backup 1
      neuromancer = import ./machines/neuromancer.nix;

      # Skynet
      skynet = import ./machines/skynet.nix;

    };
  };

}