Nix flake to reproduce bad bootable flag in sd-image.nix

flake.nix

{
  description = "NixOS configuration for an SD card image";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    # nixpkgs.url = "github:gnull/nixpkgs/patch-1";
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs =
    { self, nixpkgs, flake-utils, ... }:
    {
      ## System config, use with nixos-rebuild
      nixosConfigurations = {
        orangepi5plus = nixpkgs.lib.nixosSystem {
          system = "aarch64-linux";
          modules = [
          "${nixpkgs}/nixos/modules/installer/sd-card/sd-image.nix"
            ({config, lib, ...}: {
              boot = {
                loader = {
                  grub.enable = lib.mkForce false;
                  generic-extlinux-compatible.enable = lib.mkForce true;
                };
              };
              sdImage = {
                populateFirmwareCommands = "";
                firmwarePartitionOffset = 32;
                firmwarePartitionName = "BOOT";
                firmwareSize = 200; # MiB
                populateRootCommands = "";
              };
            })
          ];
          specialArgs = {
            inherit nixpkgs;
          };
        };
      };
    } // flake-utils.lib.eachDefaultSystem (system:
    {
      packages = {
        sdImage = self.nixosConfigurations.orangepi5plus.config.system.build.sdImage;
      };
    });
}