/lib/udev/rules.d/40-libnxt.rules is in libnxt 0.3-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | # NXT 2.0 brick
SUBSYSTEM=="usb", ACTION=="add", ATTR{idVendor}=="0694", ATTR{idProduct}=="0002", \
MODE="0660", GROUP="plugdev", SYMLINK+="nxt-%k"
# NXT 2.0 brick in flash mode
SUBSYSTEM=="usb", ACTION=="add", ATTR{idVendor}=="03eb", \
MODE="0660", GROUP="plugdev"
|