diff --git a/pkgs/development/python-modules/optax/default.nix b/pkgs/development/python-modules/optax/default.nix
index dd36a90864f22..f66b3ec43496f 100644
--- a/pkgs/development/python-modules/optax/default.nix
+++ b/pkgs/development/python-modules/optax/default.nix
@@ -3,6 +3,7 @@
 , buildPythonPackage
 , chex
 , fetchFromGitHub
+, flit-core
 , jaxlib
 , numpy
 , callPackage
@@ -11,8 +12,8 @@
 
 buildPythonPackage rec {
   pname = "optax";
-  version = "0.2.1";
-  format = "setuptools";
+  version = "0.2.2";
+  format = "pyproject";
 
   disabled = pythonOlder "3.7";
 
@@ -20,7 +21,7 @@ buildPythonPackage rec {
     owner = "deepmind";
     repo = pname;
     rev = "refs/tags/v${version}";
-    hash = "sha256-vimsVZV5Z11euLxsu998pMQZ0hG3xl96D3h9iONtl/E=";
+    hash = "sha256-sBiKUuQR89mttc9Njrh1aeUJOYdlcF7Nlj3/+Y7OMb4=";
   };
 
   outputs = [
@@ -28,6 +29,10 @@ buildPythonPackage rec {
     "testsout"
   ];
 
+  nativeBuildInputs = [
+    flit-core
+  ];
+
   buildInputs = [
     jaxlib
   ];