From 76f6cf67eee50374b015439de94797ac7954592d Mon Sep 17 00:00:00 2001
From: Dom Rodriguez <shymega@shymega.org.uk>
Date: Mon, 25 Aug 2025 22:47:54 +0100
Subject: [PATCH] pyroaring: Override Cython version for tests/build

- `pyroaring` upstream have a constraint against `cython` v3.1.x, which
  means we need to stick to `cython` v3.0.12.
   - This is due to a few tests failing with newer `cython` versions.

- It affects `buildstream` and `python3Packages.buildstream-plugins` in
  Nixpkgs, which is why I have implemented this quick workaround to
  make `pyroaring` use a older version of `cython`.
---
 pkgs/development/python-modules/pyroaring/default.nix | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/python-modules/pyroaring/default.nix b/pkgs/development/python-modules/pyroaring/default.nix
index cf7186e34ab9..a0d690946fb8 100644
--- a/pkgs/development/python-modules/pyroaring/default.nix
+++ b/pkgs/development/python-modules/pyroaring/default.nix
@@ -21,7 +21,16 @@ buildPythonPackage rec {
   };
 
   build-system = [
-    cython
+    (cython.overrideAttrs (rec {
+      name = "cython";
+      version = "3.0.12";
+      src = fetchFromGitHub {
+        owner = "cython";
+        repo = "cython";
+        tag = version;
+        hash = "sha256-clJXjQb6rVECirKRUGX0vD5a6LILzPwNo7+6KKYs2pI=";
+      };
+    }))
     setuptools
   ];