From 512034ae768b2169d8ecf0a9199e9b24dd2f7a9a Mon Sep 17 00:00:00 2001
From: Matthias Diener <mdiener@illinois.edu>
Date: Fri, 10 May 2024 10:37:24 -0500
Subject: [PATCH] refine

---
 pyproject.toml | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/pyproject.toml b/pyproject.toml
index 416f2ed8..b64d0fe2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,11 @@
 [build-system]
-requires = ["scikit-build-core >=0.9.3", "nanobind >=1.9.2", "numpy"]
+requires = [
+    "scikit-build-core >=0.9.3",
+    "nanobind >=1.9.2",
+    "numpy;python_version >= '3.9' and platform_python_implementation == 'PyPy'",
+    "oldest-supported-numpy;python_version < '3.9' or platform_python_implementation != 'PyPy'",
+    "setuptools", # needed for aksetup
+]
 build-backend = "scikit_build_core.build"
 
 [project]