From 3b405f186e6ad7d991bc8ed64fcd1500be0ad2de Mon Sep 17 00:00:00 2001
From: Sam Estep <sam@samestep.com>
Date: Fri, 15 May 2026 23:01:02 -0400
Subject: [PATCH] python3Packages.hdf5plugin: avoid cpuinfo in build

Assisted-by: Codex:gpt-5.5
---
 pkgs/development/python-modules/hdf5plugin/default.nix | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/pkgs/development/python-modules/hdf5plugin/default.nix b/pkgs/development/python-modules/hdf5plugin/default.nix
index b8847f4e2746..6ebc0fee3761 100644
--- a/pkgs/development/python-modules/hdf5plugin/default.nix
+++ b/pkgs/development/python-modules/hdf5plugin/default.nix
@@ -59,6 +59,16 @@ buildPythonPackage rec {
     "zstd"
   ];
 
+  # These feature defaults can enable CPU-specific code during the build:
+  # most are detected from the build host CPU, while BMI2 defaults to enabled
+  # on Linux/Darwin. Pin them to keep the output generic and machine-independent.
+  # https://github.com/silx-kit/hdf5plugin/blob/v6.0.0/doc/install.rst#available-options
+  env.HDF5PLUGIN_NATIVE = "False";
+  env.HDF5PLUGIN_SSE2 = "False";
+  env.HDF5PLUGIN_SSSE3 = "False";
+  env.HDF5PLUGIN_AVX2 = "False";
+  env.HDF5PLUGIN_AVX512 = "False";
+
   checkPhase = ''
     python test/test.py
   '';