diff --git a/pkgs/development/python-modules/exceptiongroup/default.nix b/pkgs/development/python-modules/exceptiongroup/default.nix
index 7dc9c78852ea..c39354ac24cc 100644
--- a/pkgs/development/python-modules/exceptiongroup/default.nix
+++ b/pkgs/development/python-modules/exceptiongroup/default.nix
@@ -4,30 +4,30 @@
   fetchFromGitHub,
   flit-scm,
   pytestCheckHook,
-  pythonOlder,
   pythonAtLeast,
+  pythonOlder,
 }:
 
 buildPythonPackage rec {
   pname = "exceptiongroup";
   version = "1.2.1";
-  format = "pyproject";
+  pyproject = true;
 
   disabled = pythonOlder "3.7";
 
   src = fetchFromGitHub {
     owner = "agronholm";
     repo = "exceptiongroup";
-    rev = version;
+    rev = "refs/tags/${version}";
     hash = "sha256-87HmZsbsoV7QPHux50sYsFY2RaIc3627dH3WAwqXfQU=";
   };
 
   nativeBuildInputs = [ flit-scm ];
 
-  doCheck = pythonAtLeast "3.11"; # infinite recursion with pytest
-
   nativeCheckInputs = [ pytestCheckHook ];
 
+  doCheck = pythonAtLeast "3.11"; # infinite recursion with pytest
+
   pythonImportsCheck = [ "exceptiongroup" ];
 
   meta = with lib; {