{
  lib,
  pkgs,
  sources,
  ...
}:
let
  inherit (pkgs) system;
  deployment-config = {
    inherit (import ./constants.nix) pathToRoot;
    nodeName = "pve";
    targetSystem = system;
    sshOpts = [ ];
    proxmox-user = "root@pam";
    proxmox-password = "mytestpw";
    node-name = "pve";
    vm-names = [ "test14" ];
  };
  # FIXME generate the image `nixos-generate` was to make, but now do it for a desired `-c configuration.nix` rather than whatever generic thing now
  deployment =
    (import ../common/data-model.nix {
      inherit system;
      config = deployment-config;
      # opt not to pass `inputs`, as we could only pass serializable arguments through to its self-call
    })."bash-proxmox-deployment".bash-proxmox-host;
  # tracking non-tarball downloads seems unsupported still in npins:
  # https://github.com/andir/npins/issues/163
  minimalIso = pkgs.fetchurl {
    url = "https://releases.nixos.org/nixos/24.05/nixos-24.05.7139.bcba2fbf6963/nixos-minimal-24.05.7139.bcba2fbf6963-x86_64-linux.iso";
    hash = "sha256-plre/mIHdIgU4xWU+9xErP+L4i460ZbcKq8iy2n4HT8=";
  };
in
{
  _class = "nixosTest";
  imports = [
    ../common/data-model-options.nix
  ];

  name = "deployment-model";
  sourceFileset = lib.fileset.unions [
    ../../run/tf-proxmox/run.sh
  ];

  nodes.pve =
    { sources, ... }:
    {
      imports = [
        "${sources.proxmox-nixos}/modules/proxmox-ve"
      ];
      users.users.root = {
        password = "mytestpw";
        hashedPasswordFile = lib.mkForce null;
      };
      services.proxmox-ve = {
        enable = true;
        ipAddress = "192.168.1.1";
        vms = {
          myvm1 = {
            vmid = 100;
            memory = 1024;
            cores = 1;
            sockets = 1;
            kvm = true;
            scsi = [ { file = "local:16"; } ];
            # cdrom = "local:iso/minimal.iso";
          };
        };
      };
      virtualisation = {
        additionalPaths = [ minimalIso ];
        diskSize = 2 * 1024;
        memorySize = 2048;
      };
    };

  nodes.deployer =
    { ... }:
    {
      nix.nixPath = [
        (lib.concatStringsSep ":" (lib.mapAttrsToList (k: v: k + "=" + v) sources))
      ];

      environment.systemPackages = [
        deployment.run
      ];

      # needed only when building from deployer
      system.extraDependenciesFromModule =
        { pkgs, ... }:
        {
          environment.systemPackages = with pkgs; [
            hello
          ];
        };
      system.extraDependencies =
        # (lib.lists.map lib.traceVal)
        # (
        # (lib.lists.concatMap (
        #   pkg:
        #   (
        #     if
        #       pkg ? inputDerivation
        #       # error: output '/nix/store/dki9d3vldafg9ydrfm7x0g0rr0qljk98-sudo-1.9.16p2' is not allowed to refer to the following paths:
        #       #          /nix/store/2xdmps65ryklmbf025bm4pxv16gb8ajv-sudo-1.9.16p2.tar.gz
        #       #          /nix/store/58br4vk3q5akf4g8lx0pqzfhn47k3j8d-bash-5.2p37
        #       #          /nix/store/8v6k283dpbc0qkdq81nb6mrxrgcb10i1-gcc-wrapper-14-20241116
        #       #          /nix/store/9r1nl9ksiyszy4qzzg6y2gcdkca0xmhy-stdenv-linux
        #       #          /nix/store/a4rmp6in7igbl1wbz9pli5nq0wiclq0y-groff-1.23.0
        #       #          /nix/store/dki9d3vldafg9ydrfm7x0g0rr0qljk98-sudo-1.9.16p2
        #       #          /nix/store/f5y58qz2fzpzgkhp0nizixi10x04ppyy-linux-pam-1.6.1
        #       #          /nix/store/shkw4qm9qcw5sc5n1k5jznc83ny02r39-default-builder.sh
        #       #          /nix/store/vj1c3wf9c11a0qs6p3ymfvrnsdgsdcbq-source-stdenv.sh
        #       #          /nix/store/yh6qg1nsi5h2xblcr67030pz58fsaxx3-coreutils-9.6
        #       && !(lib.strings.hasInfix "sudo" (lib.traceVal (builtins.toString pkg)))
        #     then
        #       lib.trace "yes" [
        #         # lib.traceVal pkg.inputDerivation # not of type `path in the Nix store'
        #         (
        #           (
        #             x: builtins.trace "${builtins.toString pkg}: ${builtins.toString (lib.isPath x.inputDerivation)}" x
        #           )
        #           pkg
        #         ).inputDerivation
        #       ]
        #     else
        #       lib.trace "no" [ ]
        #   )
        # ) machine.environment.systemPackages)
        # ++ (let
        #   base =
        #     (import "${pkgs.nixos-generators}/share/nixos-generator/nixos-generate.nix" {
        #       inherit system;
        #       inherit (sources) nixpkgs;
        #       formatConfig = "${pkgs.nixos-generators}/share/nixos-generator/formats/proxmox.nix";
        #       configuration = "${pkgs.nixos-generators}/share/nixos-generator/configuration.nix";
        #     }).config;
        # in [
        #   base.system.build.toplevel.inputDerivation
        #   base.system.build.etc.inputDerivation
        #   base.system.build.etcBasedir.inputDerivation
        #   base.system.build.etcMetadataImage.inputDerivation
        #   base.system.build.extraUtils.inputDerivation
        #   base.system.path.inputDerivation
        #   base.system.build.setEnvironment.inputDerivation
        #   base.system.build.vm.inputDerivation
        #   base.system.build.bootStage1.inputDerivation
        #   base.system.build.bootStage2.inputDerivation
        # ])
        # ++
        [
          # )
          # (
          #   (x: builtins.trace "machine.system.build.vm.inputDerivation: ${builtins.toString (lib.isPath x)}" x)
          # machine.system.build.toplevel.inputDerivation
          # machine.system.build.etc.inputDerivation
          # machine.system.build.etcBasedir.inputDerivation
          # machine.system.build.etcMetadataImage.inputDerivation
          # machine.system.build.extraUtils.inputDerivation
          # machine.system.path.inputDerivation
          # machine.system.build.setEnvironment.inputDerivation
          # machine.system.build.vm.inputDerivation
          # machine.system.build.bootStage1.inputDerivation
          # machine.system.build.bootStage2.inputDerivation
          pkgs.gnu-config
          # pkgs.gnu-config.inputDerivation
          pkgs.byacc
          # pkgs.byacc.inputDerivation
          pkgs.stdenv
          pkgs.stdenvNoCC
          sources.nixpkgs
          pkgs.vte

          # (
          #   ## We build a whole NixOS system that contains the module
          #   ## `system.extraDependenciesFromModule`, only to grab its
          #   ## configuration and the store paths needed to build it and
          #   ## dump them in `system.extraDependencies`.
          #   # see: https://git.fediversity.eu/Fediversity/Fediversity/pulls/338/files

          #   pkgs.closureInfo {
          #     rootPaths = map (drv: drv.drvPath) (
          #       [
          #         machine.system.build.toplevel.inputDerivation
          #         machine.system.build.etc.inputDerivation
          #         machine.system.build.etcBasedir.inputDerivation
          #         machine.system.build.etcMetadataImage.inputDerivation
          #         machine.system.build.extraUtils.inputDerivation
          #         machine.system.path.inputDerivation
          #         machine.system.build.setEnvironment.inputDerivation
          #         machine.system.build.vm.inputDerivation
          #         machine.system.build.bootStage1.inputDerivation
          #         machine.system.build.bootStage2.inputDerivation
          #       ]
          #       ++ lib.concatMap (x: if x ? source.inputDerivation then [ x.source.inputDerivation ] else [ ]) (
          #         lib.attrValues machine.environment.etc
          #       )
          #       ++ machine.environment.systemPackages
          #     );
          #   }
          # )

        ]
      # ++ lib.concatLists (
      #   lib.mapAttrsToList (
      #     _k: v:
      #     if v ? source.inputDerivation then
      #       [
      #         # v.source.inputDerivation
      #         (
      #           (
      #             x:
      #             builtins.trace "${builtins.toString (lib.attrNames v)}: ${builtins.toString (lib.isPath x.source.inputDerivation)}" x
      #           )
      #           v
      #         ).source.inputDerivation
      #       ]
      #     else
      #       [ ]
      #   ) machine.environment.etc
      # )
      # )
      ;
    };

  extraTestScript = ''
    pve.wait_for_unit("pveproxy.service")
    assert "running" in pve.succeed("pveproxy status")
    pve.succeed("mkdir -p /run/pve")
    assert "Proxmox" in pve.succeed("curl -s -i -k https://localhost:8006")
    # pve.succeed("pvesh get /nodes && exit 1")

    # pve.succeed("pvesh set /access/password --userid root@pam --password mypwdlol --confirmation-password mytestpw 1>&2")
    # pve.succeed("curl -s -i -k -d '{\"userid\":\"root@pam\",\"password\":\"mypwdhaha\",\"confirmation-password\":\"mypwdlol\"}' -X PUT https://localhost:8006/api2/json/access/password 1>&2")
    # on mistake: 401 No ticket
    # pve.succeed("haha")

    with subtest("Run the deployment"):
      # target.fail("hello 1>&2")
      deployer.succeed("""
        ${lib.getExe deployment.run}
      """)
      # target.wait_for_unit("multi-user.target")
      # target.succeed("su - operator -c hello 1>&2")
  '';
}