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	2025-05-23 11:58:12 UTC
+++ pyproject.toml
@@ -1,2 +1,2 @@
 [build-system]
-requires = ["setuptools >=75.8.1"]
+requires = ["setuptools >=63"]