{
  inputs = {
    # Track channels with commits tested and built by hydra
    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.05";
    unstable.url = "github:nixos/nixpkgs/nixos-unstable";

    nixpkgs-2205.url = "github:nixos/nixpkgs/nixos-22.05";
    nixpkgs-draupnir.url = "github:teutat3s/nixpkgs/draupnir-pr";

    nix-darwin.url = "github:lnl7/nix-darwin/master";
    nix-darwin.inputs.nixpkgs.follows = "nixpkgs";

    home-manager.url = "github:nix-community/home-manager/release-24.05";
    home-manager.inputs.nixpkgs.follows = "nixpkgs";

    flake-parts.url = "github:hercules-ci/flake-parts";
    nixos-flake.url = "github:srid/nixos-flake";

    deploy-rs.url = "github:serokell/deploy-rs";
    deploy-rs.inputs.nixpkgs.follows = "nixpkgs";

    agenix.url = "github:ryantm/agenix";
    agenix.inputs.nixpkgs.follows = "nixpkgs";
    agenix.inputs.darwin.follows = "nix-darwin";
    agenix.inputs.home-manager.follows = "home-manager";

    keycloak-theme-pub-solar.url = "git+https://git.pub.solar/pub-solar/keycloak-theme?ref=main";
    keycloak-theme-pub-solar.inputs.nixpkgs.follows = "nixpkgs";

    triton-vmtools.url = "git+https://git.pub.solar/pub-solar/infra-vintage?ref=main&dir=vmtools";
    triton-vmtools.inputs.nixpkgs.follows = "nixpkgs";

    element-themes.url = "github:aaronraimist/element-themes/master";
    element-themes.flake = false;

    maunium-stickerpicker.url = "github:maunium/stickerpicker?ref=master&dir=web";
    maunium-stickerpicker.flake = false;

    element-stickers.url = "git+https://git.pub.solar/pub-solar/maunium-stickerpicker-nix?ref=main";
    element-stickers.inputs.maunium-stickerpicker.follows = "maunium-stickerpicker";
    element-stickers.inputs.nixpkgs.follows = "nixpkgs";

    simple-nixos-mailserver.url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-24.05";
    simple-nixos-mailserver.inputs.nixpkgs-24_05.follows = "nixpkgs";
    simple-nixos-mailserver.inputs.nixpkgs.follows = "unstable";
  };

  outputs =
    inputs@{ self, ... }:
    inputs.flake-parts.lib.mkFlake { inherit inputs; } {
      systems = [
        "x86_64-linux"
        "aarch64-linux"
      ];

      imports = [
        inputs.nixos-flake.flakeModule
        ./logins
        ./lib
        ./overlays
        ./hosts
      ];

      perSystem =
        {
          system,
          pkgs,
          config,
          ...
        }:
        {
          _module.args = {
            inherit inputs;
            pkgs = import inputs.nixpkgs {
              inherit system;
              overlays = [ inputs.agenix.overlays.default ];
            };
            unstable = import inputs.unstable { inherit system; };
            master = import inputs.master { inherit system; };
          };
          devShells.default = pkgs.mkShell {
            buildInputs = with pkgs; [
              deploy-rs
              nixpkgs-fmt
              agenix
              age-plugin-yubikey
              cachix
              editorconfig-checker
              nodePackages.prettier
              nvfetcher
              shellcheck
              shfmt
              treefmt
              nixos-generators
              inputs.nixpkgs-2205.legacyPackages.${system}.terraform
              jq
            ];
          };
          devShells.ci = pkgs.mkShell { buildInputs = with pkgs; [ nodejs ]; };
        };

      flake =
        let
          username = "barkeeper";
        in
        {
          inherit username;

          nixosModules = builtins.listToAttrs (
            map (x: {
              name = x;
              value = import (./modules + "/${x}");
            }) (builtins.attrNames (builtins.readDir ./modules))
          );

          checks = builtins.mapAttrs (
            system: deployLib: deployLib.deployChecks self.deploy
          ) inputs.deploy-rs.lib;

          formatter."x86_64-linux" = inputs.unstable.legacyPackages."x86_64-linux".nixfmt-rfc-style;

          deploy.nodes = self.lib.deploy.mkDeployNodes self.nixosConfigurations {
            nachtigall = {
              hostname = "nachtigall.wg.pub.solar";
              sshUser = username;
            };
            flora-6 = {
              hostname = "flora-6.wg.pub.solar";
              sshUser = username;
            };
            metronom = {
              hostname = "metronom.wg.pub.solar";
              sshUser = username;
            };
            tankstelle = {
              hostname = "tankstelle.wg.pub.solar";
              sshUser = username;
            };
          };
        };
    };
}