v2.0.3 bundled build hits 'Directory does not contain a valid build
tree' because the crate's build.rs uses `meson setup --reconfigure`
unconditionally, which fails on first run when the build dir doesn't
yet contain prior meson state. Try the main branch in case it's been
fixed post-release.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>