Read-only file system when trying to write to 3DS NAND backup

[primaviera]

I'm currently trying to mount my 3DS NAND backup (from GodMode9) on linux with the following command
sudo mount_nandctr --boot9 boot9.bin 241126_AWxxxxxxxx_sysnand_00.bin mount_folder
Attempting to write anything to it gives me this error
cp: cannot create regular file 'mount_folder/ctrnand_full.img': Read-only file system (trying to replace ctrnand_full.img)
touch: cannot touch 'mount_folder/a': Read-only file system (trying to create an empty file, for testing)
Is there any way to fix this? I also tried using the rw mount option to no avail.

[ihaveamac]

The mount is not a real folder, it's showing fake files that are part of the NAND image. Currently due to limitations of how it works (#68) files cannot be simply be copied into it. For now dd can be used instead to overwrite a file with the contents of another, for example: dd if=ctrnand_full.img of=mount_folder/ctrnand_full.img bs=8M conv=notrunc