stage_runtime (the pinned pm/ self-repair builder) passes no_config=True,
but that only appended uv's --no-config, which removes config FILES. The
pip-mirror bridge (pm.index_config) reaches uv as env vars instead, so a
user's pip.conf index-url still rode into the runtime sync via
runtime_environment() -> _base_environment(env=None). Re-resolving the
official-index pm/uv.lock against a mirror changes the resolution, and
uv sync --locked refuses — breaking the top-level update / doctor /
pm-repair recovery paths on any machine with a pip mirror (#124418).
When no_config is set, strip forwarded index/transport knobs from the
child env: a fully-pinned graph never needs a mirror to resolve, and the
default path keeps the bridge so mirrored/air-gapped application installs
still work.
32aeb9ef7b