[Bug]: build fails with head rules_python

[keith]

What happened?

Currently if you test rules_py with head rules_python, it fails with:

ERROR: Traceback (most recent call last):
        File "/home/ubuntu/dev/bazelbuild/rules_py/WORKSPACE", line 97, column 39, in <toplevel>
                load("@python_toolchain//:defs.bzl", "interpreter")
Error: file '@python_toolchain//:defs.bzl' does not contain symbol 'interpreter'
ERROR: Error computing the main repository mapping: Encountered error while reading extension file 'requirements.bzl': no such package '@@pypi//': error loading package 'external': Could not load //external package

starting at this commit bazelbuild/rules_python@68d1b41

Version

Development (host) and target OS/architectures: ubuntu 22.04 aarch64

Output of bazel --version: 7.4.0

Version of the Aspect rules, or other relevant rules from your
WORKSPACE or MODULE.bazel file: testing in rules_py examples

Language(s) and/or frameworks involved:

How to reproduce

No response

Any other information?

No response