How do I use mypy to annotate a numpy array containing a custom dtype?

Question

I have a custom numpy dtype that will be used in numpy arrays. How should I annotate the array variable in a function declaration in order to capture the type constraint? I'm guessing I need to better annotate the dtype declaration itself, but am not sure how.

As an example, please consider this script:

import numpy as np
import numpy.typing as npt

MY_DTYPE = np.dtype([("major", "u2"), ("minor", "u2"), ("patch", "u2")])
my_array = np.array([(1, 2, 3), (4, 5, 6)], dtype=MY_DTYPE)


def print_entries(array_var: npt.NDArray[MY_DTYPE]) -> None:  # <- mypy gets angry here
    """Print array entries."""
    for row in array_var:
        print(row)

mypy gets angry at the npt.NDArray[MY_DTYPE] and points me to the variables vs. type aliases section of the common mistakes. But the TypeAlias and Type annotations don't seem to be solving the problem. How do I annotate this?

Thanks much for your help!