{
  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";
    alejandra = {
      url = "github:kamadorueda/alejandra/3.0.0";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    # email
    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";
    skynet_website_renew.url = "gitlab:compsoc1%2Fskynet%2Fwebsite/alumni-renew?host=gitlab.skynet.ie";
    skynet_discord_bot.url = "gitlab:compsoc1%2Fskynet/discord-bot?host=gitlab.skynet.ie";
    compsoc_public.url = "gitlab:compsoc1%2Fcompsoc/presentations?host=gitlab.skynet.ie";
  };

  nixConfig.bash-prompt-suffix = "[Skynet Dev] ";

  outputs = {
    self,
    nixpkgs,
    agenix,
    alejandra,
    ...
  } @ 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
        pkgs.buildPackages.colmena
        pkgs.buildPackages.nmap
      ];
      buildInputs = [agenix.packages.x86_64-linux.default];
      shellHook = ''export EDITOR="${pkgs.nano}/bin/nano --nonewlines"'';
    };

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

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