diff --git a/pkgs/development/python-modules/ipwhl/default.nix b/pkgs/development/python-modules/ipwhl/default.nix
index 80068293145..6e6d0e21ef0 100644
--- a/pkgs/development/python-modules/ipwhl/default.nix
+++ b/pkgs/development/python-modules/ipwhl/default.nix
@@ -1,10 +1,10 @@
 { lib, buildPythonPackage, pythonOlder, fetchFromSourcehut
-, kubo, packaging, tomli }:
+, kubo, packaging, tomli, flit-core }:
 
 buildPythonPackage rec {
   pname = "ipwhl";
   version = "1.1.0";
-  format = "flit";
+  format = "pyproject";
   disabled = pythonOlder "3.6";
 
   src = fetchFromSourcehut {
@@ -14,6 +14,7 @@ buildPythonPackage rec {
     hash = "sha256-YaIYcoUnbiv9wUOFIzGj2sWGbh7NsqRQcqOR2X6+QZA=";
   };
 
+  nativeBuildInputs = [ flit-core ];
   buildInputs = [ kubo ];
   propagatedBuildInputs = [ packaging tomli ];
   doCheck = false; # there's no test