diff --git a/pkgs/development/python-modules/fe25519/default.nix b/pkgs/development/python-modules/fe25519/default.nix
index 4f47b634030e..a19efc6be1c6 100644
--- a/pkgs/development/python-modules/fe25519/default.nix
+++ b/pkgs/development/python-modules/fe25519/default.nix
@@ -5,16 +5,16 @@
   fetchPypi,
   fountains,
   parts,
+  pytest-cov-stub,
   pytestCheckHook,
   pythonOlder,
   setuptools,
-  wheel,
 }:
 
 buildPythonPackage rec {
   pname = "fe25519";
   version = "1.5.0";
-  format = "pyproject";
+  pyproject = true;
 
   disabled = pythonOlder "3.7";
 
@@ -23,23 +23,18 @@ buildPythonPackage rec {
     hash = "sha256-la+17tPHjceMTe7Wk8DGVaSptk8XJa+l7GTeqLIFDvs=";
   };
 
-  nativeBuildInputs = [
-    setuptools
-    wheel
-  ];
+  build-system = [ setuptools ];
 
-  propagatedBuildInputs = [
+  dependencies = [
     bitlist
     fountains
     parts
   ];
 
-  nativeCheckInputs = [ pytestCheckHook ];
-
-  postPatch = ''
-    substituteInPlace pyproject.toml \
-      --replace "--doctest-modules --ignore=docs --cov=fe25519 --cov-report term-missing" ""
-  '';
+  nativeCheckInputs = [
+    pytest-cov-stub
+    pytestCheckHook
+  ];
 
   pythonImportsCheck = [ "fe25519" ];
 
diff --git a/pkgs/development/python-modules/ge25519/default.nix b/pkgs/development/python-modules/ge25519/default.nix
index d3e92913b128..d8bf085d7142 100644
--- a/pkgs/development/python-modules/ge25519/default.nix
+++ b/pkgs/development/python-modules/ge25519/default.nix
@@ -6,16 +6,16 @@
   fetchPypi,
   fountains,
   parts,
+  pytest-cov-stub,
   pytestCheckHook,
   pythonOlder,
   setuptools,
-  wheel,
 }:
 
 buildPythonPackage rec {
   pname = "ge25519";
   version = "1.5.1";
-  format = "pyproject";
+  pyproject = true;
 
   disabled = pythonOlder "3.7";
 
@@ -24,24 +24,19 @@ buildPythonPackage rec {
     hash = "sha256-VKDPiSdufWwrNcZSRTByFU4YGoJrm48TDm1nt4VyclA=";
   };
 
-  nativeBuildInputs = [
-    setuptools
-    wheel
-  ];
+  build-system = [ setuptools ];
 
-  propagatedBuildInputs = [
+  dependencies = [
     fe25519
     parts
     bitlist
     fountains
   ];
 
-  nativeCheckInputs = [ pytestCheckHook ];
-
-  postPatch = ''
-    substituteInPlace pyproject.toml \
-      --replace "--doctest-modules --ignore=docs --cov=ge25519 --cov-report term-missing" ""
-  '';
+  nativeCheckInputs = [
+    pytest-cov-stub
+    pytestCheckHook
+  ];
 
   pythonImportsCheck = [ "ge25519" ];