{ config, lib, ... }: {

    options.sysconfig.opts.devices.main = lib.options.mkOption {
        type = lib.types.str;
        default = null;
    };

    config = lib.mkIf config.disko.enable {
        disko.devices = {
            disk.main = {
                device = config.sysconfig.opts.devices.main;
                type = "disk";
                content = {
                    type = "gpt";
                    partitions = {
                        boot = {
                            name = "boot";
                            size = "1M";
                            type = "EF02";
                        };
                        esp = {
                            name = "ESP";
                            size = "500M";
                            type = "EF00";
                            content = {
                                type = "filesystem";
                                format = "vfat";
                                mountpoint = "/boot";
                            };
                        };
                        swap = {
                            size = "4G";
                            content = {
                                type = "swap";
                                resumeDevice = true;
                            };
                        };
                        root = {
                            name = "root";
                            size = "100%";
                            content = {
                                type = "lvm_pv";
                                vg = "root_vg";
                            };
                        };
                    };
                };
            };

            lvm_vg = {
                root_vg = {
                    type = "lvm_vg";
                    lvs = {
                        root = {
                            size = "100%FREE";
                            content = {
                                type = "btrfs";
                                extraArgs = [ "-f" ];
                                subvolumes = {
                                    "/root" = {
                                        mountpoint = "/";
                                    };
                                    "/persist" = {
                                        mountOptions = [ "subvol=persist" "noatime" ];
                                        mountpoint = "/persist";
                                    };
                                    "/nix" = {
                                        mountOptions = [ "subvol=nix" "noatime" ];
                                        mountpoint = "/nix";
                                    };
                                };
                            };
                        };
                    };
                };
            };
        };
    };
}