fix(package): correct setuptools build backend for wheel builds

VERSION

@@ -1 +1 @@
-v0.20.0
+v0.20.1

docs/decisions/0008-lakeflow-framework-package.md

@@ -79,7 +79,7 @@ without change until `v1.0.0`.
 ```toml
 [build-system]
 requires = ["setuptools>=68", "wheel"]
-build-backend = "setuptools.backends.legacy:build"
+build-backend = "setuptools.build_meta"
 
 [project]
 name = "lakeflow-framework"

docs/source/contributor_dev_env.rst

@@ -45,6 +45,14 @@ Once you have cloned the Lakeflow Framework repository, you'll need to follow th
 
       python -m build
 
+   If you use `uv <https://docs.astral.sh/uv/>`_, the equivalent is:
+
+   .. code-block:: bash
+
+      uv build --wheel --clear -o dist
+
+   Both commands use the setuptools backend declared in ``pyproject.toml``.
+
    If you change a dependency in any of the ``requirements*.txt`` files,
    regenerate all three lockfiles with the helper script from the repo root:
 

pyproject.toml

@@ -1,6 +1,6 @@
 [build-system]
 requires = ["setuptools>=68", "wheel"]
-build-backend = "setuptools.backends.legacy:build"
+build-backend = "setuptools.build_meta"
 
 [project]
 name = "lakeflow-framework"