{
  description = "Deployment for skynet";

  inputs = {
    # gonna start off with a fairly modern base
    nixpkgs.url = "nixpkgs/nixos-unstable";
    # Return to using unstable once the current master is merged in
    # nixpkgs.url = "nixpkgs/nixos-unstable";

    lix-module = {
      url = "https://git.lix.systems/lix-project/nixos-module/archive/2.91.1-1.tar.gz";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    # utility stuff
    flake-utils.url = "github:numtide/flake-utils";
    agenix.url = "github:ryantm/agenix";
    arion.url = "github:hercules-ci/arion";
    alejandra = {
      url = "github:kamadorueda/alejandra";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    colmena.url = "github:zhaofengli/colmena";

    # we host our own
    simple-nixos-mailserver = {
      inputs.nixpkgs.follows = "nixpkgs";
      url = "git+https://forgejo.skynet.ie/Skynet/misc_nixos-mailserver";
    };

    ######################
    ### skynet backend ###
    ######################
    skynet_ldap_backend.url = "git+https://forgejo.skynet.ie/Skynet/ldap_backend";
    skynet_ldap_frontend.url = "git+https://forgejo.skynet.ie/Skynet/ldap_frontend";
    skynet_website_wiki.url = "git+https://forgejo.skynet.ie/Skynet/wiki";
    skynet_website_games.url = "git+https://forgejo.skynet.ie/Skynet/website_games";
    skynet_discord_bot.url = "git+https://forgejo.skynet.ie/Skynet/discord-bot";
    # for testing a local build
    # skynet_discord_bot.url = "git+file:/_college/CompSoc/Skynet/discord_bot?shallow=1";

    #####################
    ### compsoc stuff ###
    #####################
    compsoc_public.url = "git+https://forgejo.skynet.ie/Computer_Society/presentations_compsoc";

    #################
    ### skynet.ie ###
    #################

    # this should always point to teh current website
    skynet_website.url = "git+https://forgejo.skynet.ie/Skynet/website_2017";

    # these are past versions of teh website
    skynet_website_2023.url = "git+https://forgejo.skynet.ie/Skynet/website_2017?rev=c4d61c753292bf73ed41b47b1607cfc92a82a191";
    # this is not 100% right since this is from teh archive from 2022 or so
    skynet_website_2017.url = "git+https://forgejo.skynet.ie/Skynet/website_2017?rev=edd922c5b13fa1f520e8e265a3d6e4e189852b99";

    # this is more of 2012 than 2009 but started in 2009
    skynet_website_2009.url = "git+https://forgejo.skynet.ie/Skynet/website_2009";
  };

  nixConfig = {
    bash-prompt-suffix = "[Skynet Dev] ";
    extra-substituters = "https://nix-cache.skynet.ie/skynet-cache";
    extra-trusted-public-keys = "skynet-cache:zMFLzcRZPhUpjXUy8SF8Cf7KGAZwo98SKrzeXvdWABo=";
  };

  outputs = {
    self,
    nixpkgs,
    agenix,
    alejandra,
    colmena,
    ...
  } @ inputs: let
    pkgs = nixpkgs.legacyPackages.x86_64-linux.pkgs;
  in {
    formatter.x86_64-linux = alejandra.defaultPackage."x86_64-linux";

    devShells.x86_64-linux.default = pkgs.mkShell {
      name = "Skynet build env";
      nativeBuildInputs = [
        pkgs.buildPackages.git
        colmena.defaultPackage."x86_64-linux"
        pkgs.attic-client
        pkgs.buildPackages.nmap
      ];
      buildInputs = [agenix.packages.x86_64-linux.default];
      shellHook = ''export EDITOR="${pkgs.nano}/bin/nano --nonewlines"; unset LD_LIBRARY_PATH;'';
    };

    colmena = {
      meta = {
        nixpkgs = import nixpkgs {
          system = "x86_64-linux";
          overlays = [];
        };
        specialArgs = {
          inherit inputs self;
        };
      };

      # 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;

      # 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, user ssh access
      skynet = import ./machines/skynet.nix;

      # Main skynet sites
      earth = import ./machines/earth.nix;

      # Nextcloud
      cadie = import ./machines/cadie.nix;

      # trainee server
      marvin = import ./machines/marvin.nix;

      # Public Services
      calculon = import ./machines/calculon.nix;

      # metrics
      ariia = import ./machines/ariia.nix;

      # games server - panel/host
      optimus = import ./machines/optimus.nix;
    };
  };
}