{
  inputs,
  tree,
}: let
  nixlib = inputs.nixpkgs.lib;
  inherit (nixlib.attrsets) mapAttrs mapAttrs' nameValuePair filterAttrs mapAttrsToList;
  inherit (nixlib.lists) sortOn;
  inherit (inputs.self.lib.lib) userIs;
  inherit (inputs.self.lib) systems;
  templateSystem = inputs.self.nixosConfigurations.reimu;
  templateUsers = filterAttrs (_: userIs "peeps") templateSystem.config.users.users;
  mkNodeUsers = users: let
    nodeUsers = mapAttrsToList (_: mkNodeUser) templateUsers;
  in
    sortOn (user: user.uid) nodeUsers;
  mkNodeUser = user: {
    inherit (user) name uid;
    authorizedKeys = user.openssh.authorizedKeys.keys;
  };
  nodeSystems = let
    matchesNode = nodeName: system: system.config.proxmox.enabled && system.config.proxmox.node.name == nodeName;
  in nodeName: filterAttrs (_: matchesNode nodeName) systems;
  mkNodeSystem = system: {
    inherit (system.config.access) hostName;
    network = let
      inherit (system.config.network) networks;
    in {
      networks = {
        int = if networks.int.enable or false then {
          inherit (networks.int) macAddress address4 address6;
        } else null;
        local = if networks.local.enable or false then {
          inherit (networks.local) macAddress address4 address6;
        } else null;
        tail = if networks.tail.enable or false then {
          inherit (networks.tail) address4 address6;
          macAddress = null;
        } else null;
      };
    };
  };
  mkNodeSystems = systems: mapAttrs (_: mkNodeSystem) systems;
  mkNode = {name}: {
    users = mkNodeUsers templateUsers;
    systems = mkNodeSystems (nodeSystems name);
  };
  mkNetwork = system: {
    inherit (system.config.access) hostName;
    networks = {
      int = null;
      local = null;
      tail = null;
    } // mapAttrs' (_: network: nameValuePair network.name {
      inherit (network) macAddress address4 address6;
    }) system.config.network.networks;
  };
  mkSystem = name: system: {
    network = mkNetwork system;
  };
in {
  reisen = mkNode {name = "reisen";};
  systems = mapAttrs mkSystem systems;
}