uv-build
uv-build — Python Build Backend
uv_build is Astral's Rust-based build backend for Python packages. As of uv-build 0.11.7 (Apr 2026), it is the native backend documented by uv for most pure Python packages. Pure Python packages only — no C/Rust extensions.
When to Use uv-build
Is your package pure Python?
├─ YES → Needs VCS versioning, build hooks, or dynamic metadata?
│ ├─ NO → uv_build (fast, zero-config, excellent defaults)
│ └─ YES → hatchling (extensible, plugin ecosystem)
└─ NO → What kind of extensions?
├─ Rust (PyO3) → maturin
├─ C/C++ (CMake) → scikit-build-core
└─ C/C++ (classic) → setuptools
Migration blocker: dynamic = [...] is not supported. Projects using dynamic = ["version"] with hatchling/setuptools must switch to static versions in pyproject.toml (use uv version --bump for version management).
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