diff --git a/pkgs/development/python-modules/pyp/default.nix b/pkgs/development/python-modules/pyp/default.nix
index 74782267dbd7..b9bcb978be85 100644
--- a/pkgs/development/python-modules/pyp/default.nix
+++ b/pkgs/development/python-modules/pyp/default.nix
@@ -5,6 +5,7 @@
 , coreutils
 , pythonOlder
 , astunparse
+, flit-core
 , jq
 , bc
 }:
@@ -12,7 +13,7 @@
 buildPythonPackage rec {
   pname = "pyp";
   version = "1.1.0";
-  format = "setuptools";
+  format = "pyproject";
 
   disabled = pythonOlder "3.6";
 
@@ -23,6 +24,10 @@ buildPythonPackage rec {
     hash = "sha256-A1Ip41kxH17BakHEWEuymfa24eBEl5FIHAWL+iZFM4I=";
   };
 
+  nativeBuildInputs = [
+    flit-core
+  ];
+
   propagatedBuildInputs = lib.optionals (pythonOlder "3.9") [
     astunparse
   ];