{
  inputs = {
    nixpkgs = {
      type = "github";
      owner = "NixOS";
      repo = "nixpkgs";
      ref = "nixos-23.05";
    };

    colmena = {
      type = "github";
      owner = "zhaofengli";
      repo = "colmena";

      inputs.nixpkgs.follows = "nixpkgs";
    };

    nixago = {
      type = "github";
      owner = "nix-community";
      repo = "nixago";

      inputs.nixpkgs.follows = "nixpkgs";
      inputs.flake-utils.follows = "utils";
    };

    pre-commit-hooks = {
      type = "github";
      owner = "cachix";
      repo = "pre-commit-hooks.nix";

      inputs.nixpkgs.follows = "nixpkgs";
    };

    sops = {
      type = "github";
      owner = "Mic92";
      repo = "sops-nix";

      inputs.nixpkgs.follows = "nixpkgs";
      inputs.nixpkgs-stable.follows = "nixpkgs";
    };

    utils = {
      type = "github";
      owner = "numtide";
      repo = "flake-utils";
    };

    disko = {
      type = "github";
      owner = "nix-community";
      repo = "disko";

      inputs.nixpkgs.follows = "nixpkgs";
    };

    gather = {
      type = "github";
      owner = "fooker";
      repo = "gather.nix";
    };

    ldap-sync = {
      type = "git";
      url = "https://gogs.informatik.hs-fulda.de/fooker/ldap-sync.git";
      flake = false;
    };
  };

  outputs = { nixpkgs, utils, disko, ... }@inputs: {
    colmena = import ./deployment.nix inputs;

    devShell = utils.lib.eachSystemMap utils.lib.allSystems (system:
      let
        pkgs = nixpkgs.legacyPackages.${system};

        colmena = inputs.colmena.defaultPackage.${system}.overrideAttrs (final: prev: {
          patches = (prev.patches or [ ]) ++ [
            ./patches/colmena-disable-ssh-master.patch
          ];
        });

        pre-commit-hooks = inputs.pre-commit-hooks.lib.${system}.run {
          src = ./.;
          hooks = {
            nixpkgs-fmt.enable = true;
            statix.enable = true;
            shellcheck.enable = true;
          };
        };

        sops-hooks = inputs.nixago.lib.${system}.make {
          data = (pkgs.callPackage ./sops.nix { }).config;
          output = ".sops.yaml";
          format = "yaml";
        };

        gather = pkgs.writeShellScript "gather" ''
          ROOT=${toString ./.}

          MACHINES=( "$(${colmena}/bin/colmena eval -E '{nodes, ...}: ')" )
          if [[ "$1" != "" ]]; then
            
          else
            mapfile -t MACHINES < <()
          fi
        '';
      in
      pkgs.mkShell {
        buildInputs = [
          colmena
          #gather
        ] ++ (with pkgs; [
          bash
          gitAndTools.git
          gnutar
          gzip
          nixUnstable
          openssh
          sops
          age
          mkdocs
        ] ++ [
          (pkgs.vscode-with-extensions.override {
            vscode = pkgs.vscodium;
            vscodeExtensions = with pkgs.vscode-extensions; [
              bbenoist.nix
            ];
          })
        ]);

        shellHook = ''
          ${pre-commit-hooks.shellHook}
          ${sops-hooks.shellHook}
        '';
      });
  };
}