[Bazel CI] Unable to find package for @@rules_python+//python:py_test.bzl

[sgowroji]

CI: https://buildkite.com/bazel/bazel-at-head-plus-downstream/builds/4170#019255cd-fa44-4ffc-8b06-776030abbf8b

Platform: Ubuntu

Logs:

ERROR: �[0mSkipping '...': error loading package under directory '': error loading package '': Internal error while loading Starlark builtins: Failed to autoload external symbols: Unable to find package for @@rules_python+//python:py_test.bzl: The repository '@@rules_python+' could not be resolved: Repository '@@rules_python+' is not defined. Most likely you need to upgrade the version of rules repository in the WORKSPACE file.
ERROR: �[0merror loading package under directory '': error loading package '': Internal error while loading Starlark builtins: Failed to autoload external symbols: Unable to find package for @@rules_python+//python:py_test.bzl: The repository '@@rules_python+' could not be resolved: Repository '@@rules_python+' is not defined. Most likely you need to upgrade the version of rules repository in the WORKSPACE file.

Culprit:

Steps:

git clone https://github.com/bazelbuild/rules_testing
git reset 724bf647aaf30d302f07c7890b5c8149526bbfe7  --hard
export USE_BAZEL_VERSION=166eaa09f9cd31836df898ea236e1e0633a73b12
bazel test --noenable_bzlmod --enable_workspace ... 

CC Greenteam @mai93

[rickeylev]

note for repro: I think this requires --incompatible_autoload_externally=@rules_python

I think the fix is in upstream, but not yet released: bazelbuild/rules_python#2274