diff --git a/pkgs/development/python-modules/clldutils/default.nix b/pkgs/development/python-modules/clldutils/default.nix
index 76b2eceaeb09..f5b975f8467a 100644
--- a/pkgs/development/python-modules/clldutils/default.nix
+++ b/pkgs/development/python-modules/clldutils/default.nix
@@ -2,10 +2,8 @@
 , attrs
 , buildPythonPackage
 , colorlog
-, csvw
 , fetchFromGitHub
 , git
-, isPy27
 , lxml
 , markdown
 , markupsafe
@@ -15,30 +13,36 @@
 , pytest-mock
 , pytestCheckHook
 , python-dateutil
+, pythonOlder
+, setuptools
 , tabulate
 }:
 
 buildPythonPackage rec {
   pname = "clldutils";
-  version = "3.19.0";
-  format = "setuptools";
-  disabled = isPy27;
+  version = "3.21.0";
+  pyproject = true;
+  disabled = pythonOlder "3.8";
 
   src = fetchFromGitHub {
     owner = "clld";
     repo = pname;
     rev = "v${version}";
-    hash = "sha256-dva0lbbTxvETDPkACxpI3PPzWh5gz87Fv6W3lTjNv3Q=";
+    hash = "sha256-OD+WJ9JuYZb/oXDgVqL4i5YlcVEt0+swq0SB3cutyRo=";
   };
 
   patchPhase = ''
-    substituteInPlace setup.cfg --replace "--cov" ""
+    substituteInPlace setup.cfg \
+      --replace-fail "--cov" ""
   '';
 
+  nativeBuildInputs = [
+    setuptools
+  ];
+
   propagatedBuildInputs = [
     attrs
     colorlog
-    csvw
     lxml
     markdown
     markupsafe
@@ -55,13 +59,8 @@ buildPythonPackage rec {
     git
   ];
 
-  disabledTests = [
-    # uses pytest.approx which is not supported in a boolean context in pytest7
-    "test_to_dec"
-    "test_roundtrip"
-  ];
-
   meta = with lib; {
+    changelog = "https://github.com/clld/clldutils/blob/${src.rev}/CHANGES.md";
     description = "Utilities for clld apps without the overhead of requiring pyramid, rdflib et al";
     homepage = "https://github.com/clld/clldutils";
     license = licenses.asl20;
diff --git a/pkgs/development/python-modules/colorlog/default.nix b/pkgs/development/python-modules/colorlog/default.nix
index 8a7ff6494e4d..1e8cfb0d0d03 100644
--- a/pkgs/development/python-modules/colorlog/default.nix
+++ b/pkgs/development/python-modules/colorlog/default.nix
@@ -7,12 +7,12 @@
 
 buildPythonPackage rec {
   pname = "colorlog";
-  version = "6.8.0";
+  version = "6.8.2";
   pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-+7b9+dVoXyUX84j7Kbsn1U6GVN0x9YvCo7IX6WepXKY=";
+    hash = "sha256-Pj4HmkH+taG2T5eLXqT0YECpTxHw6Lu4Jh49u+ymTUQ=";
   };
 
   nativeBuildInputs = [