From 844857d1bae9206f83e543b509351b9cdbbb6209 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bern=C3=A1t=20G=C3=A1bor?= <gaborjbernat@gmail.com>
Date: Fri, 3 Jul 2026 06:07:52 -0700
Subject: [PATCH] =?UTF-8?q?=F0=9F=90=9B=20fix(build):=20make=20hatchling?=
 =?UTF-8?q?=20floor=20match=20python-requires?=
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Building the sdist on Python 3.8/3.9 failed to resolve a backend because
the build requirement pinned hatchling>=1.28, which dropped Python 3.9,
while the project still declares requires-python >=3.8. Split the floor
with an environment marker so old interpreters get hatchling>=1.27, the
last release supporting <3.10, and modern ones keep >=1.28.

Fixes #92.
---
 docs/changelog/92.packaging.rst | 3 +++
 pyproject.toml                  | 3 ++-
 2 files changed, 5 insertions(+), 1 deletion(-)
 create mode 100644 docs/changelog/92.packaging.rst

diff --git a/docs/changelog/92.packaging.rst b/docs/changelog/92.packaging.rst
new file mode 100644
index 0000000..7decd64
--- /dev/null
+++ b/docs/changelog/92.packaging.rst
@@ -0,0 +1,3 @@
+Constrain the ``hatchling`` build requirement per Python version so sdist builds resolve a compatible backend on the
+declared ``>=3.8`` floor - ``hatchling>=1.28`` dropped Python 3.9, leaving 3.8/3.9 unbuildable from source - by
+:user:`gaborbernat`.
diff --git a/pyproject.toml b/pyproject.toml
index 283b6ce..de2563e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,7 +2,8 @@
 build-backend = "hatchling.build"
 requires = [
   "hatch-vcs>=0.5",
-  "hatchling>=1.28",
+  "hatchling>=1.27; python_version<'3.10'",
+  "hatchling>=1.28; python_version>='3.10'",
 ]
 
 [project]