From 232f9e1cd9799e1f4304781a02b95a029c46dde7 Mon Sep 17 00:00:00 2001
From: Martin Weinelt <hexa@darmstadt.ccc.de>
Date: Sat, 9 Aug 2025 16:12:48 +0200
Subject: [PATCH] python3Packages.fiona: relax cython constraint

---
 pkgs/development/python-modules/fiona/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkgs/development/python-modules/fiona/default.nix b/pkgs/development/python-modules/fiona/default.nix
index 5c3b15d96bef..6a7c8b51bee3 100644
--- a/pkgs/development/python-modules/fiona/default.nix
+++ b/pkgs/development/python-modules/fiona/default.nix
@@ -39,6 +39,11 @@ buildPythonPackage rec {
     hash = "sha256-5NN6PBh+6HS9OCc9eC2TcBvkcwtI4DV8qXnz4tlaMXc=";
   };
 
+  postPatch = ''
+    substituteInPlace pyproject.toml \
+      --replace-fail "cython~=3.0.2" cython
+  '';
+
   build-system = [
     cython
     gdal # for gdal-config