Bazel oci_python_image example doesn't build when adding new Python dependency

I'm new to Bazel Python, so trying to follow the examples in https://github.com/aspect-build/bazel-examples/tree/main/oci_python_image.

The oci_python_image example builds and runs well without any modification.

But after I added a new depedency like "numpy" to it

py_library(
    name = "hello_world_lib",
    srcs = [
        "__init__.py",
        "app.py",
    ],
    imports = [".."],
    visibility = ["//oci_python_image:__subpackages__"],
    deps = [
        "@pip//cowsay",
        "@pip//numpy",
    ],
)

and requirements.txt file updated to

# This file is imported into /requirements/all.txt, so
# these requirements are constraint-solved and pinned with the rest of the monorepo.
cowsay
testcontainers
numpy

The build bazel run oci_python_image/hello_world:image_load fails with error message

ERROR: /.../bazel-examples-main/oci_python_image/hello_world/BUILD.bazel:8:11: no such package '@@rules_python++pip+pip//numpy': BUILD file not found in directory 'numpy' of external repository @@rules_python++pip+pip. Add a BUILD file to a directory to mark it as a package. and referenced by '//oci_python_image/hello_world:hello_world_lib'

Version Local OS: MacOs Sonoma Version 14.1.1 Output of bazel --version: bazel 8.3.0

Is there something wrong with my config? Thanks!

How to reproduce

1. Download code repository https://github.com/aspect-build/bazel-examples
2. Make the edits above, and

bazel run oci_python_image/hello_world:image_load

Looking around missing pieces to config, but haven't found any so far.