{device ? throw "Must define a device, e.g. /dev/sda"}:
{
  disko.devices = {
    disk.main = {
        inherit device;
        type = "disk";
        content = {
          type = "gpt";
          partitions = {
            ESP = {
              priority = 1;
              name = "ESP";
              start = "1M";
              end = "512M";
              type = "EF00";
              content = {
                type = "filesystem";
                format = "vfat";
                mountpoint = "/boot";
              };
            };
          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" ];
                    mountpoint = "/persist";
                  };

                  "/nix" = {
                    mountOptions = [ "subvol=nix" "noatime" ];
                    mountpoint = "/nix";
                  };

                  "/swap" = {
                    mountOptions = [ "noatime" ];
                    mountpoint = "/.swapvol";
                    swap.swapfile.size = "8192M";
                  };
                };
              };
            };
        };
      };
    };
  };
}