Reduce setuptools requirement until [1] is resolved. Seems to work fine
with 63.x.

[1] https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=270358

--- pyproject.toml.orig	2025-06-03 14:12:19 UTC
+++ pyproject.toml
@@ -1,7 +1,7 @@
 # The project configuration for PyQt-builder.
 
 [build-system]
-requires = ["setuptools>=77", "setuptools_scm>=8"]
+requires = ["setuptools>=63", "setuptools_scm>=8"]
 build-backend = "setuptools.build_meta"
 
 [tool.setuptools_scm]
@@ -14,8 +14,8 @@ requires-python = ">=3.8"
 urls.homepage = "https://github.com/Python-PyQt/PyQt-builder"
 dependencies = ["packaging", "sip >=6.7, <7"]
 requires-python = ">=3.8"
-license = "BSD-2-Clause"
-license-files = ["LICENSE"]
+license = {file = "LICENSE"}
+classifiers = ["License :: OSI Approved :: BSD License"]
 dynamic = ["version"]
 
 [[project.authors]]