From 550360d98e59300a23d52c182c5369fc12e491e9 Mon Sep 17 00:00:00 2001
From: Kirill Radzikhovskyy <kirillrdy@gmail.com>
Date: Mon, 1 Jun 2026 20:20:42 +1000
Subject: [PATCH] python3Packages.ale-py: fix darwin build

---
 pkgs/development/python-modules/ale-py/default.nix | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/pkgs/development/python-modules/ale-py/default.nix b/pkgs/development/python-modules/ale-py/default.nix
index 3282fd421f5d..ec10c5decc26 100644
--- a/pkgs/development/python-modules/ale-py/default.nix
+++ b/pkgs/development/python-modules/ale-py/default.nix
@@ -48,6 +48,15 @@ buildPythonPackage (finalAttrs: {
   ++ lib.optionals stdenv.hostPlatform.isLinux [
     jax
   ];
+
+  # disable lto on darwin, cmake cannot find llvm-ar
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
+    substituteInPlace src/ale/CMakeLists.txt \
+      --replace-fail \
+        'set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)' \
+        'set(CMAKE_INTERPROCEDURAL_OPTIMIZATION FALSE)'
+  '';
+
   dontUseCmakeConfigure = true;
 
   buildInputs = [
@@ -104,10 +113,5 @@ buildPythonPackage (finalAttrs: {
     changelog = "https://github.com/Farama-Foundation/Arcade-Learning-Environment/releases/tag/${finalAttrs.src.tag}";
     license = lib.licenses.gpl2;
     maintainers = with lib.maintainers; [ billhuang ];
-    badPlatforms = [
-      # FAILED: src/ale/libale.a
-      # /bin/sh: CMAKE_CXX_COMPILER_AR-NOTFOUND: command not found
-      lib.systems.inspect.patterns.isDarwin
-    ];
   };
 })