From 57c8d87e96c6b85b2f08e64da3103cbb38856c4c Mon Sep 17 00:00:00 2001
From: Martin Weinelt <hexa@darmstadt.ccc.de>
Date: Tue, 5 Dec 2023 03:46:00 +0100
Subject: [PATCH] python312Packages.pandas: use cython 3

This is a hack to allow pandas 2.1.3 to build on python 3.12, which is
only supported from 2.2.0

Cython 2 still calls into distutils, Cython 3 does not.
---
 pkgs/development/python-modules/pandas/default.nix | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/python-modules/pandas/default.nix b/pkgs/development/python-modules/pandas/default.nix
index 818cb783dd2a..7351e6536416 100644
--- a/pkgs/development/python-modules/pandas/default.nix
+++ b/pkgs/development/python-modules/pandas/default.nix
@@ -2,10 +2,12 @@
 , stdenv
 , buildPythonPackage
 , fetchFromGitHub
+, pythonAtLeast
 , pythonOlder
 
 # build-system
 , cython
+, cython_3
 , meson-python
 , meson
 , oldest-supported-numpy
@@ -77,12 +79,14 @@ let pandas = buildPythonPackage rec {
 
   postPatch = ''
     substituteInPlace pyproject.toml \
+      --replace "Cython>=0.29.33,<3" "Cython" \
       --replace "meson-python==0.13.1" "meson-python>=0.13.1" \
       --replace "meson==1.2.1" "meson>=1.2.1"
   '';
 
   nativeBuildInputs = [
-    cython
+    # TODO: hack to support pandas on python3.12, remove with pandas 2.2.0
+    (if pythonAtLeast "3.12" then cython_3 else cython)
     meson-python
     meson
     numpy