From 0ce1bda5ae6f8ea5cbaaa7a1df43f8dca29ccb6a Mon Sep 17 00:00:00 2001
From: Martin Joerg <martin.joerg@gmail.com>
Date: Sun, 12 Oct 2025 17:47:05 +0000
Subject: [PATCH 1/2] python3Packages.cassandra-driver: enable parallel
 building

---
 pkgs/development/python-modules/cassandra-driver/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/development/python-modules/cassandra-driver/default.nix b/pkgs/development/python-modules/cassandra-driver/default.nix
index 4d325e8d2431..532b911045ac 100644
--- a/pkgs/development/python-modules/cassandra-driver/default.nix
+++ b/pkgs/development/python-modules/cassandra-driver/default.nix
@@ -62,6 +62,10 @@ buildPythonPackage rec {
   # This is used to determine the version of cython that can be used
   CASS_DRIVER_ALLOWED_CYTHON_VERSION = cython.version;
 
+  preBuild = ''
+    export CASS_DRIVER_BUILD_CONCURRENCY=$NIX_BUILD_CORES
+  '';
+
   # Make /etc/protocols accessible to allow socket.getprotobyname('tcp') in sandbox,
   # also /etc/resolv.conf is referenced by some tests
   preCheck =

From 3dafbf5b08ec1c350bc09260b73432cf892a1ae4 Mon Sep 17 00:00:00 2001
From: Martin Joerg <martin.joerg@gmail.com>
Date: Sun, 12 Oct 2025 20:37:56 +0000
Subject: [PATCH 2/2] python3Packages.cassandra-driver: unbreak for Python >=
 3.13

Co-authored-by: Robert Scott <code@humanleg.org.uk>
---
 .../python-modules/cassandra-driver/default.nix     | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/pkgs/development/python-modules/cassandra-driver/default.nix b/pkgs/development/python-modules/cassandra-driver/default.nix
index 532b911045ac..7aefe2844a36 100644
--- a/pkgs/development/python-modules/cassandra-driver/default.nix
+++ b/pkgs/development/python-modules/cassandra-driver/default.nix
@@ -6,6 +6,7 @@
   cython,
   eventlet,
   fetchFromGitHub,
+  fetchpatch,
   geomet,
   gevent,
   gremlinpython,
@@ -21,7 +22,6 @@
   twisted,
   setuptools,
   distutils,
-  pythonAtLeast,
 }:
 
 buildPythonPackage rec {
@@ -36,6 +36,15 @@ buildPythonPackage rec {
     hash = "sha256-RX9GLk2admzRasmP7LCwIfsJIt8TC/9rWhIcoTqS0qc=";
   };
 
+  patches = [
+    # https://github.com/datastax/python-driver/pull/1242
+    (fetchpatch {
+      name = "Maintain-compatibility-with-CPython-3.13.patch";
+      url = "https://github.com/datastax/python-driver/commit/b144a84a1f97002c4545b335efaac719519cd9fa.patch";
+      hash = "sha256-60ki6i1SiGxK+J4x/8voS7Hh2x249ykpjU9EMYKD8kc=";
+    })
+  ];
+
   pythonRelaxDeps = [ "geomet" ];
 
   build-system = [
@@ -120,8 +129,6 @@ buildPythonPackage rec {
   };
 
   meta = {
-    # cassandra/io/libevwrapper.c:668:10: error: implicit declaration of function ‘PyEval_ThreadsInitialized’ []
-    broken = pythonAtLeast "3.13";
     description = "Python client driver for Apache Cassandra";
     homepage = "http://datastax.github.io/python-driver";
     changelog = "https://github.com/datastax/python-driver/blob/${version}/CHANGELOG.rst";