diff --git a/pkgs/development/python-modules/zarr/default.nix b/pkgs/development/python-modules/zarr/default.nix
index 493023893fa7..03048aa92db1 100644
--- a/pkgs/development/python-modules/zarr/default.nix
+++ b/pkgs/development/python-modules/zarr/default.nix
@@ -1,6 +1,6 @@
 { lib
 , buildPythonPackage
-, isPy27
+, pythonOlder
 , fetchPypi
 , setuptools-scm
 , asciitree
@@ -13,7 +13,9 @@
 buildPythonPackage rec {
   pname = "zarr";
   version = "2.14.2";
-  disabled = isPy27;
+  format = "pyproject";
+
+  disabled = pythonOlder "3.8";
 
   src = fetchPypi {
     inherit pname version;