Description of the bug:

Since 48eb023, using py_test without using rules_python, results in a toolchain error:

ERROR: /Users/brentley/Developer/rules_xcodeproj/tools/params_processors/BUILD:55:8: While resolving toolchains for target //tools/params_processors:swift_debug_settings_processor_tests (ee6eec1): No matching toolchains found for types @@bazel_tools//tools/python:toolchain_type.

Which category does this issue belong to?

Python Rules

What's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

git checkout https://github.com/MobileNativeFoundation/rules_xcodeproj.git
cd rules_xcodeproj
USE_BAZEL_VERSION=last_green bazelisk build --nobuild //tools/params_processors:swift_debug_settings_processor_tests

Which operating system are you running Bazel on?

macOS 14.1.1

What is the output of bazel info release?

No response

If bazel info release returns development version or (@non-git), tell us how you built Bazel.

No response

What's the output of git remote get-url origin; git rev-parse master; git rev-parse HEAD ?

No response

Is this a regression? If yes, please try to identify the Bazel commit where the bug was introduced.

48eb023

Have you found anything relevant by searching the web?

#20315

Any other information, logs, or outputs that you want to share?

No response