{
  description = "NixOS definitions for our physical servers";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-23.05";
  };

  outputs = {nixpkgs, ...}: let
    servers = {
      jefke = {
        hardware-configuration = import ./hardware-configuration/jefke.nix;
        system-arch = "x86_64-linux";
      };
    };
    serverNames = builtins.attrNames servers;
    serverWithNameAttr = name: (builtins.getAttr name servers) // {name = name;};

    genNixosConfigurations = config:
      nixpkgs.lib.genAttrs serverNames (
        serverName:
          nixpkgs.lib.nixosSystem (config (serverWithNameAttr serverName))
      );
  in {
    formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.alejandra;

    nixosConfigurations = genNixosConfigurations (
      server: {
        system = server.system-arch;
        specialArgs = {inherit server;};
        modules = [
          ./configuration.nix
        ];
      }
    );
  };
}