Unable to build raw efi image, "cannot allocate memory" errors.

[Seikm]

Following the steps to install NixOS with UEFI on an Orange Pi 5, I can't get past step "2. Flash NixOS to SD card".

During the process of building the raw EFI image (with nix build github:gnull/nixos-rk3588#rawEfiImage-opi5 --show-trace -L --verbose), I'm getting thousands of practically identical "Cannot allocate memory" error messages, e.g.:

nixos-disk-image> error while reading directory /build/root[/nix/store/XXX]: Cannot allocate memory
nixos-disk-image> error while reading directory /build/root: Cannot allocate memory

The instructions suggest a way to solve this (check dmesg, and use echo 1 > /proc/sys/vm/compact_memory), but nothing has worked for me. I searched and haven't found anything that solves this (and similar problems dont have answers), so any kind of help would be useful to me at this point.

Some additional information:

These are the lines I put in my config:

{
  boot.binfmt.emulatedSystems = [ "aarch64-linux" ];
  nix.settings.extra-platforms = config.boot.binfmt.emulatedSystems;
}

I also added a systemd service with some "solutions" that i found to run when the system starts:

{
  systemd.services."enable-vm-compact-memory" = {
    description = "Enable VM compact memory to mitigate cannot allocate memory errors";
    wantedBy = [ "multi-user.target" ];
    script = ''
      echo 1 > /proc/sys/vm/compact_memory
      echo 1 > /proc/sys/vm/overcommit_memory
      echo 3 > /proc/sys/vm/drop_caches
    '';
  };
}

Using dmesg to find logs, nothing returned using sudo dmesg | grep qemu and sudo dmesg | grep "out of memory".