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-rw-r--r--pkgs/development/python-modules/pybind11/default.nix18
1 files changed, 17 insertions, 1 deletions
diff --git a/pkgs/development/python-modules/pybind11/default.nix b/pkgs/development/python-modules/pybind11/default.nix
index fe29cde9e52..186dca2c17d 100644
--- a/pkgs/development/python-modules/pybind11/default.nix
+++ b/pkgs/development/python-modules/pybind11/default.nix
@@ -12,16 +12,30 @@
 , pytestCheckHook
 , libxcrypt
 , makeSetupHook
+, darwin
 }: let
   setupHook = makeSetupHook {
     name = "pybind11-setup-hook";
     substitutions = {
       out = placeholder "out";
-      pythonInterpreter = python.pythonForBuild.interpreter;
+      pythonInterpreter = python.pythonOnBuildForHost.interpreter;
       pythonIncludeDir = "${python}/include/python${python.pythonVersion}";
       pythonSitePackages = "${python}/${python.sitePackages}";
     };
   } ./setup-hook.sh;
+
+  # clang 16 defaults to C++17, which results in the use of aligned allocations by pybind11.
+  # libc++ supports aligned allocations via `posix_memalign`, which is available since 10.6,
+  # but clang has a check hard-coded requiring 10.13 because that’s when Apple first shipped a
+  # support for C++17 aligned allocations on macOS.
+  # Tell clang we’re targeting 10.13 on x86_64-darwin while continuing to use the default SDK.
+  stdenv' = if stdenv.isDarwin && stdenv.isx86_64
+    then python.stdenv.override (oldStdenv: {
+      buildPlatform = oldStdenv.buildPlatform // { darwinMinVersion = "10.13"; };
+      targetPlatform = oldStdenv.targetPlatform // { darwinMinVersion = "10.13"; };
+      hostPlatform = oldStdenv.hostPlatform // { darwinMinVersion = "10.13"; };
+    })
+    else python.stdenv;
 in buildPythonPackage rec {
   pname = "pybind11";
   version = "2.11.1";
@@ -41,6 +55,8 @@ in buildPythonPackage rec {
   buildInputs = lib.optionals (pythonOlder "3.9") [ libxcrypt ];
   propagatedBuildInputs = [ setupHook ];
 
+  stdenv = stdenv';
+
   dontUseCmakeBuildDir = true;
 
   # Don't build tests if not needed, read the doInstallCheck value at runtime