broken grub on nixos 20.03

configuration.nix

# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, pkgs, ... }:

{
  # make a copy of this configuration, just in case
  environment.etc.current-nixos-config.source = ./.;

  imports =
    [ # Include the results of the hardware scan.
      ./hardware-configuration.nix

      ./security
      ./services
      ./users
    ];

  nixpkgs.config.allowUnfree = true;

  # Use the GRUB 2 boot loader.
  boot = {
    loader = {
      efi = {
        # canTouchEfiVariables = true;
        # efiSysMountPoint = "/boot/efi";
      };
      grub = {
        enable = true;
        version = 2;
        efiSupport = true;
        # efiInstallAsRemovable = true;
        # device = "/dev/nvme0n1";
        device = "nodev";
        useOSProber = true;
      };
      systemd-boot.enable = true;
    };
    
    # Kernel modules:
    # hide hdmi audio device
    # disable usb suspend so devices work after waking
    extraModprobeConfig = ''
      options snd_hda_intel enable=1,0
      options usbcore       autosuspend=-1
    '';
  };
  
  system.stateVersion = "18.09";
}

hardware-configuration.nix

# Do not modify this file!  It was generated by ‘nixos-generate-config’
# and may be overwritten by future invocations.  Please make changes
# to /etc/nixos/configuration.nix instead.
{ config, lib, pkgs, ... }:

{
  imports =
    [ <nixpkgs/nixos/modules/installer/scan/not-detected.nix>
    ];

  boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "nvme" "usbhid" "sd_mod" ];
  boot.kernelModules = [ "kvm-intel" ];
  boot.extraModulePackages = [ ];

  fileSystems."/" =
    { device = "/dev/disk/by-uuid/2292158c-5890-4ad7-8c04-9827b6c283e1";
      fsType = "ext4";
    };

  fileSystems."/boot" =
    { device = "/dev/disk/by-uuid/581B-D468";
      fsType = "vfat";
    };

  fileSystems."/media/repository" =
    { device = "/dev/disk/by-uuid/8CFA8C6CFA8C547C";
      fsType = "ntfs";
      options = ["defaults" "user"];
    };

  fileSystems."/media/other" =
    { device = "/dev/disk/by-uuid/4F77A0F450ED4DAA";
      fsType = "ntfs";
    };

  swapDevices =
    [ { device = "/dev/disk/by-uuid/d0f7deea-4dd0-46f0-8759-70a1c1613ffb"; }
    ];

  nix.maxJobs = lib.mkDefault 12;
  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
}