{
  description = "PVV-DNS";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable-small";

    # Broken, wait for https://github.com/nix-community/dns.nix/pull/52
    #dns.url = "github:nix-community/dns.nix";
    dns.url = "github:felixalbrigtsen/dns.nix";
    dns.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs =
    { nixpkgs, dns, ... }@inputs:
    let
      inherit (nixpkgs) lib;
      systems = [
        "x86_64-linux"
        "aarch64-linux"
        "aarch64-darwin"
      ];
      forAllSystems = f: lib.genAttrs systems f;
    in
    {
      packages = forAllSystems (
        system:
        let
          pkgs = nixpkgs.legacyPackages.${system};
        in
        rec {
          zoneFiles = pkgs.callPackage ./zoneConfig.nix {
            inherit dns;
          };

          nsdConfig = pkgs.callPackage ./nsd.conf.nix { inherit pkgs; };

          default = pkgs.runCommand "pvv-dns" { } ''
            mkdir -p $out/zones
            mkdir -p $out/etc/nsd

            cp -r ${zoneFiles}/* $out/zones/
            cp -r ${nsdConfig} $out/etc/nsd/nsd.conf
          '';
        }
      );
    };
}