Environment Variables

RULES_PYTHON_REPO_DEBUG

When 1, repository rules will print debug information about what they’re doing. This is mostly useful for development to debug errors.

RULES_PYTHON_REPO_DEBUG_VERBOSITY

Determines the verbosity of logging output for repo rules. Valid values:

• DEBUG

• INFO

• TRACE

RULES_PYTHON_PIP_ISOLATED

Determines if --isolated is used with pip.

Valid values:

• 0 and false mean to not use isolated mode

• Other non-empty values mean to use isolated mode.

RULES_PYTHON_BZLMOD_DEBUG

When 1, bzlmod extensions will print debug information about what they’re doing. This is mostly useful for development to debug errors.

RULES_PYTHON_ENABLE_PYSTAR

When 1, the rules_python Starlark implementation of the core rules is used instead of the Bazel-builtin rules. Note this requires Bazel 7+.

RULES_PYTHON_BOOTSTRAP_VERBOSE

When 1, debug information about bootstrapping of a program is printed to stderr.

VERBOSE_COVERAGE

When 1, debug information about coverage behavior is printed to stderr.