diff --git a/pkgs/development/python-modules/argon2-cffi/default.nix b/pkgs/development/python-modules/argon2-cffi/default.nix
index 24e32526682..2282a06e5c6 100644
--- a/pkgs/development/python-modules/argon2-cffi/default.nix
+++ b/pkgs/development/python-modules/argon2-cffi/default.nix
@@ -6,6 +6,7 @@
 , wheel
 , buildPythonPackage
 , fetchPypi
+, flit-core
 , isPy3k
 , lib
 , stdenv
@@ -15,13 +16,17 @@
 buildPythonPackage rec {
   pname = "argon2-cffi";
   version = "21.3.0";
-  format = "flit";
+  format = "pyproject";
 
   src = fetchPypi {
     inherit pname version;
     sha256 = "d384164d944190a7dd7ef22c6aa3ff197da12962bd04b17f64d4e93d934dba5b";
   };
 
+  nativeBuildInputs = [
+    flit-core
+  ];
+
   propagatedBuildInputs = [ cffi six argon2-cffi-bindings ]
     ++ lib.optional (!isPy3k) enum34;