If for some reason, you're unable to boot into the system, try this.
First, boot into a live USB for the nixOS ISO.
Log in as root:
sudo -i
Decrypt the root partition:
lsblk # list current partitions
cryptsetup open /dev/nvme0n1p2 root # decrypt
Mount the partitions:
# Root partition
mount /dev/disk/by-label/NIXROOT /mnt
# Boot partition
mkdir -p /mnt/boot
mount /dev/disk/by-label/NIXBOOT /mnt/boot
Enter the system, logged in as root
nixos-enter --root /mnt
After entering in, you can also log in as the user account using:
su - toh995