diff --git a/pkgs/development/python-modules/macfsevents/default.nix b/pkgs/development/python-modules/macfsevents/default.nix
index b8b4a57ca15f..c64b7ed58c69 100644
--- a/pkgs/development/python-modules/macfsevents/default.nix
+++ b/pkgs/development/python-modules/macfsevents/default.nix
@@ -2,12 +2,13 @@
   lib,
   buildPythonPackage,
   fetchPypi,
+  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "macfsevents";
   version = "0.8.4";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchPypi {
     pname = "MacFSEvents";
@@ -17,17 +18,24 @@ buildPythonPackage rec {
 
   patches = [ ./fix-packaging.patch ];
 
+  build-system = [ setuptools ];
+
+  # PyEval_InitThreads is deprecated in Python 3.9, to be removed in Python 3.14
+  # and breaks the build under clang 16.
+  # https://github.com/malthe/macfsevents/issues/49
+  env.NIX_CFLAGS_COMPILE = "-Wno-implicit-function-declaration";
+
   # Some tests fail under nix build directory
   doCheck = false;
 
   pythonImportsCheck = [ "fsevents" ];
 
-  meta = with lib; {
+  meta = {
     description = "Thread-based interface to file system observation primitives";
     homepage = "https://github.com/malthe/macfsevents";
     changelog = "https://github.com/malthe/macfsevents/blob/${version}/CHANGES.rst";
-    license = licenses.bsd2;
+    license = lib.licenses.bsd2;
     maintainers = [ ];
-    platforms = platforms.darwin;
+    platforms = lib.platforms.darwin;
   };
 }