diff --git a/pkgs/development/python-modules/aioprocessing/default.nix b/pkgs/development/python-modules/aioprocessing/default.nix
index b09accb38b7..4a66a8f35d0 100644
--- a/pkgs/development/python-modules/aioprocessing/default.nix
+++ b/pkgs/development/python-modules/aioprocessing/default.nix
@@ -8,7 +8,7 @@
 buildPythonPackage rec {
   pname = "aioprocessing";
   version = "2.0.1";
-  format = "flit";
+  format = "pyproject";
 
   disabled = pythonOlder "3.5";