From 8507ec58cdc118bf301b18aba8e1d07f2abb33b7 Mon Sep 17 00:00:00 2001
From: Stefan Frijters <sfrijters@gmail.com>
Date: Thu, 19 Feb 2026 22:38:16 +0100
Subject: [PATCH] python3Packages.pyhepmc: move env vars into env for
 structuredAttrs

---
 pkgs/development/python-modules/pyhepmc/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/python-modules/pyhepmc/default.nix b/pkgs/development/python-modules/pyhepmc/default.nix
index 28339c457468..4e34a3bc239c 100644
--- a/pkgs/development/python-modules/pyhepmc/default.nix
+++ b/pkgs/development/python-modules/pyhepmc/default.nix
@@ -38,7 +38,7 @@ buildPythonPackage rec {
 
   dontUseCmakeConfigure = true;
 
-  CMAKE_ARGS = [ "-DEXTERNAL_PYBIND11=ON" ];
+  env.CMAKE_ARGS = toString [ "-DEXTERNAL_PYBIND11=ON" ];
 
   nativeCheckInputs = [
     graphviz