diff --git a/pkgs/development/python-modules/chex/default.nix b/pkgs/development/python-modules/chex/default.nix
index 559d047032c6..08ce0916c25e 100644
--- a/pkgs/development/python-modules/chex/default.nix
+++ b/pkgs/development/python-modules/chex/default.nix
@@ -2,6 +2,7 @@
 , buildPythonPackage
 , pythonOlder
 , fetchFromGitHub
+, setuptools
 , absl-py
 , cloudpickle
 , dm-tree
@@ -15,8 +16,8 @@
 
 buildPythonPackage rec {
   pname = "chex";
-  version = "0.1.85";
-  format = "setuptools";
+  version = "0.1.86";
+  pyproject = true;
 
   disabled = pythonOlder "3.9";
 
@@ -24,10 +25,14 @@ buildPythonPackage rec {
     owner = "deepmind";
     repo = "chex";
     rev = "refs/tags/v${version}";
-    hash = "sha256-7k/+2dNNbPBXtbabuOEVpAI7T1SuM4JDf074dmTg/vs=";
+    hash = "sha256-Z5Ns4fG5pC99I4xdGjDMKX6YZpTtd1y0TWcIOtr7dug=";
   };
 
-  propagatedBuildInputs = [
+  build-system = [
+    setuptools
+  ];
+
+  dependencies = [
     absl-py
     jaxlib
     jax