diff --git a/pkgs/development/python-modules/formencode/default.nix b/pkgs/development/python-modules/formencode/default.nix
index ab90f40faff4..a249f2e7e9e2 100644
--- a/pkgs/development/python-modules/formencode/default.nix
+++ b/pkgs/development/python-modules/formencode/default.nix
@@ -13,15 +13,14 @@
 
 buildPythonPackage rec {
   pname = "formencode";
-  version = "2.1.0";
+  version = "2.1.1";
   pyproject = true;
 
   disabled = pythonOlder "3.7";
 
   src = fetchPypi {
-    pname = "FormEncode";
-    inherit version;
-    hash = "sha256-63TSIweKKM8BX6iJZsbjTy0Y11EnMY1lwUS+2a/EJj8=";
+    inherit pname version;
+    hash = "sha256-4X8WGZ0jLlT2eRIATzrTM827uBoaGhAjis8JurmfkZk=";
   };
 
   postPatch = ''
diff --git a/pkgs/development/python-modules/sqlobject/default.nix b/pkgs/development/python-modules/sqlobject/default.nix
index b8cfeb2a2b54..8081b5095c7f 100644
--- a/pkgs/development/python-modules/sqlobject/default.nix
+++ b/pkgs/development/python-modules/sqlobject/default.nix
@@ -13,7 +13,7 @@
 
 buildPythonPackage rec {
   pname = "sqlobject";
-  version = "3.12.0";
+  version = "3.13.0";
   pyproject = true;
 
   disabled = pythonOlder "3.7";
@@ -22,7 +22,7 @@ buildPythonPackage rec {
     owner = "sqlobject";
     repo = "sqlobject";
     tag = version;
-    hash = "sha256-fxENuVTmp/EcDAdVqQWdtqtEW1mI+dfaImgWzGAaWfQ=";
+    hash = "sha256-KcpbGqNsR77kwbTLKwvwWpyLvF1UowIsKM7Kirs7Zw4=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/yamlloader/default.nix b/pkgs/development/python-modules/yamlloader/default.nix
index 43a79881bd66..388e88284bc7 100644
--- a/pkgs/development/python-modules/yamlloader/default.nix
+++ b/pkgs/development/python-modules/yamlloader/default.nix
@@ -2,7 +2,9 @@
   lib,
   buildPythonPackage,
   fetchPypi,
-  pytest,
+  hatch-vcs,
+  hatchling,
+  pytestCheckHook,
   pyyaml,
   hypothesis,
   pythonOlder,
@@ -11,7 +13,7 @@
 buildPythonPackage rec {
   pname = "yamlloader";
   version = "1.5.1";
-  format = "setuptools";
+  pyproject = true;
 
   disabled = pythonOlder "3.7";
 
@@ -20,11 +22,16 @@ buildPythonPackage rec {
     hash = "sha256-jezhmwUKyxxqjKFKoweTOI+b4VT3NLgmVB+aGCjUHOw=";
   };
 
-  propagatedBuildInputs = [ pyyaml ];
+  build-system = [
+    hatch-vcs
+    hatchling
+  ];
+
+  dependencies = [ pyyaml ];
 
   nativeCheckInputs = [
     hypothesis
-    pytest
+    pytestCheckHook
   ];
 
   pythonImportsCheck = [