{ disks ? [ "/dev/vda" ], ... }: {
  disko.devices = {
    disk = {
      # TODO: would be nice to give this a good name?
      primary = {
        type = "disk";
        device = builtins.elemAt disks 0;
        content = {
          type = "gpt";
          partitions = {
            ESP = {
              label = "EFI";
              name = "ESP";
              size = "512M";
              type = "EF00";
              content = {
                type = "filesystem";
                format = "vfat";
                mountpoint = "/boot";
                mountOptions = [
                  "defaults"
                ];
              };
            };
            root = {
              size = "100%";
              content = {
                type = "btrfs";
                extraArgs = [ "-f" ];
                subvolumes = {
                  "/root" = {
                    mountpoint = "/";
                    mountOptions = [ ];
                  };
                  "/home" = {
                    mountpoint = "/home";
                    mountOptions = [ "compress=zstd" ];
                  };
                  "/nix" = {
                    mountpoint = "/nix";
                    mountOptions = [ "compress=zstd" "noatime" ];
                  };
                };
              };
            };
          };
        };
      };
    };
  };
}