From 2e2fbe8d04d9843eb438ff273e72341f3e7a7c8a Mon Sep 17 00:00:00 2001
From: Martin Weinelt <hexa@darmstadt.ccc.de>
Date: Fri, 30 Jan 2026 12:28:12 +0100
Subject: [PATCH] python3Packages.pandas: build with cython 3.1

With Cython 3.2 the serialization of some objects fails and breaks tests
downstream in dask.
---
 pkgs/development/python-modules/pandas/default.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/python-modules/pandas/default.nix b/pkgs/development/python-modules/pandas/default.nix
index 1b6138529d56..c14031a20e21 100644
--- a/pkgs/development/python-modules/pandas/default.nix
+++ b/pkgs/development/python-modules/pandas/default.nix
@@ -5,7 +5,7 @@
   fetchFromGitHub,
 
   # build-system
-  cython,
+  cython_3_1,
   meson-python,
   meson,
   pkg-config,
@@ -90,7 +90,7 @@ let
     '';
 
     build-system = [
-      cython
+      cython_3_1
       meson-python
       meson
       numpy