diff --git a/pkgs/development/python-modules/tidyexc/default.nix b/pkgs/development/python-modules/tidyexc/default.nix
index b4f7ed0ef58..5e14812fe7b 100644
--- a/pkgs/development/python-modules/tidyexc/default.nix
+++ b/pkgs/development/python-modules/tidyexc/default.nix
@@ -2,12 +2,13 @@
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
+, flit
 }:
 
 buildPythonPackage rec {
   pname = "tidyexc";
   version = "0.10.0";
-  format = "flit";
+  format = "pyproject";
 
   disabled = pythonOlder "3.6";
 
@@ -16,6 +17,10 @@ buildPythonPackage rec {
     sha256 = "1gl1jmihafawg7hvnn4xb20vd2x5qpvca0m1wr2gk0m2jj42yiq6";
   };
 
+  nativeBuildInputs = [
+    flit
+  ];
+
   pythonImportsCheck = [
     "tidyexc"
   ];