From 8101328d963f6387cf10979ea81ebe11e2dda736 Mon Sep 17 00:00:00 2001
From: Paul Romano <paul.k.romano@gmail.com>
Date: Thu, 20 Jul 2023 09:23:42 -0400
Subject: [PATCH] Build h5py against Cython < 3.0 in CI (#2613)

---
 tools/ci/gha-install.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/ci/gha-install.sh b/tools/ci/gha-install.sh
index fb81fcea2..2cef974d3 100755
--- a/tools/ci/gha-install.sh
+++ b/tools/ci/gha-install.sh
@@ -40,7 +40,7 @@ if [[ $MPI == 'y' ]]; then
     export CC=mpicc
     export HDF5_MPI=ON
     export HDF5_DIR=/usr/lib/x86_64-linux-gnu/hdf5/mpich
-    pip install wheel cython
+    pip install wheel "cython<3.0"
     pip install --no-binary=h5py --no-build-isolation h5py
 fi