diff --git a/pkgs/development/python-modules/diff-cover/default.nix b/pkgs/development/python-modules/diff-cover/default.nix
index 7079f082b028..c1e0f4f64b85 100644
--- a/pkgs/development/python-modules/diff-cover/default.nix
+++ b/pkgs/development/python-modules/diff-cover/default.nix
@@ -21,7 +21,7 @@
 buildPythonPackage rec {
   pname = "diff-cover";
   version = "9.2.1";
-  format = "pyproject";
+  pyproject = true;
 
   disabled = pythonOlder "3.9";
 
@@ -31,9 +31,9 @@ buildPythonPackage rec {
     hash = "sha256-X6Wy1xzPXRbNIipxwsoGnZv1+j1lf2+sm02cIzeTI78=";
   };
 
-  nativeBuildInputs = [ poetry-core ];
+  build-system = [ poetry-core ];
 
-  propagatedBuildInputs = [
+  dependencies = [
     chardet
     jinja2
     jinja2-pluralize