diff --git a/pkgs/development/python-modules/msgspec/default.nix b/pkgs/development/python-modules/msgspec/default.nix
index 5689334d0da7..6dac69d22db8 100644
--- a/pkgs/development/python-modules/msgspec/default.nix
+++ b/pkgs/development/python-modules/msgspec/default.nix
@@ -4,22 +4,27 @@
 , msgpack
 , pytestCheckHook
 , pythonOlder
+, setuptools
 }:
 
 buildPythonPackage rec {
   pname = "msgspec";
   version = "0.18.6";
-  format = "setuptools";
+  pyproject = true;
 
   disabled = pythonOlder "3.8";
 
   src = fetchFromGitHub {
     owner = "jcrist";
-    repo = pname;
+    repo = "msgspec";
     rev = "refs/tags/${version}";
     hash = "sha256-xqtV60saQNINPMpOnZRSDnicedPSPBUQwPSE5zJGrTo=";
   };
 
+  nativeBuildInputs = [
+    setuptools
+  ];
+
   # Requires libasan to be accessible
   doCheck = false;