-- Fix build with older setuptools
--
-- The upstream pyproject.toml uses a string for the license field and
-- the license-files field, which require a newer setuptools than what is
-- available in some environments.
-- This patch fixes these issues and relaxes the setuptools requirement.

--- pyproject.toml.orig 2026-06-16 16:59:52 UTC
+++ pyproject.toml
@@ -2,7 +2,7 @@ requires = [
 build-backend = "setuptools.build_meta"
 requires = [
   "cffi>=1.17.1",
-  "setuptools>=77.0.3",
+  "setuptools>=63.1.0",
   "wheel",
 ]
 
@@ -18,8 +18,7 @@ keywords = [
   "operations research",
   "Optimization",
 ]
-license = "LGPL-2.1-or-later"
-license-files = [ "COPYRIGHTS" ]
+license = { text = "LGPL-2.1-or-later" }
 authors = [
   { name = "Manuel López-Ibáñez", email = "manuel.lopez-ibanez@manchester.ac.uk" },
   { name = "Fergus Rooney", email = "fergus.rooney@outlook.com" },