diff --git a/pkgs/development/python-modules/lazr/config.nix b/pkgs/development/python-modules/lazr/config.nix
index b10ad25972b5..bc369705e265 100644
--- a/pkgs/development/python-modules/lazr/config.nix
+++ b/pkgs/development/python-modules/lazr/config.nix
@@ -1,13 +1,54 @@
-{ buildPythonPackage, fetchPypi, lazr_delegates }:
+{ lib
+, buildPythonPackage
+, fetchPypi
+, setuptools
+, lazr-delegates
+, zope_interface
+, pytestCheckHook
+}:
 
 buildPythonPackage rec {
-  pname = "lazr.config";
-  version = "2.2.3";
-
-  propagatedBuildInputs = [ lazr_delegates ];
+  pname = "lazr-config";
+  version = "3.0";
+  pyproject = true;
 
   src = fetchPypi {
-    inherit pname version;
-    sha256 = "b74a73f8b63e6dc6732fc1f3d88e2f236596ddf089ef6e1794ece060e8cfabe1";
+    pname = "lazr.config";
+    inherit version;
+    hash = "sha256-oU5PbMCa68HUCxdhWK6g7uIlLBQAO40O8LMcfFFMNkQ=";
+  };
+
+  nativeBuildInputs = [
+    setuptools
+  ];
+
+  propagatedBuildInputs = [
+    lazr-delegates
+    zope_interface
+  ];
+
+  pythonImportsCheck = [
+    "lazr.config"
+  ];
+
+  nativeCheckInputs = [
+    pytestCheckHook
+  ];
+
+  # change the directory to avoid a namespace-related problem
+  # ModuleNotFoundError: No module named 'lazr.delegates'
+  preCheck = ''
+    cd $out
+  '';
+
+  pythonNamespaces = [
+    "lazr"
+  ];
+
+  meta = with lib; {
+    description = "Create configuration schemas, and process and validate configurations";
+    homepage = "https://launchpad.net/lazr.config";
+    changelog = "https://git.launchpad.net/lazr.config/tree/NEWS.rst?h=${version}";
+    license = licenses.lgpl3Only;
   };
 }
diff --git a/pkgs/development/python-modules/lazr/delegates.nix b/pkgs/development/python-modules/lazr/delegates.nix
index 40e2e47d517d..e0b03e693194 100644
--- a/pkgs/development/python-modules/lazr/delegates.nix
+++ b/pkgs/development/python-modules/lazr/delegates.nix
@@ -1,15 +1,46 @@
-{ buildPythonPackage, fetchPypi, nose, zope_interface }:
+{ lib
+, buildPythonPackage
+, fetchPypi
+, setuptools
+, zope_interface
+, pytestCheckHook
+}:
 
 buildPythonPackage rec {
-  pname = "lazr.delegates";
-  version = "2.0.4";
-
-  propagatedBuildInputs = [ nose zope_interface ];
-
-  doCheck = false;  # cannot import name 'ClassType' from 'types'
+  pname = "lazr-delegates";
+  version = "2.1.0";
+  pyproject = true;
 
   src = fetchPypi {
-    inherit pname version;
-    sha256 = "1rdnl85j9ayp8n85l0ciip621j9dcziz5qnmv2m7krgwgcn31vfx";
+    pname = "lazr.delegates";
+    inherit version;
+    hash = "sha256-UNT7iHK5UuV6SOEmEOVQ+jBm7rV8bGx1tqUUJBi6wZw=";
+  };
+
+  nativeBuildInputs = [
+    setuptools
+  ];
+
+  propagatedBuildInputs = [
+    zope_interface
+  ];
+
+  pythonImportsCheck = [
+    "lazr.delegates"
+  ];
+
+  nativeCheckInputs = [
+    pytestCheckHook
+  ];
+
+  pythonNamespaces = [
+    "lazr"
+  ];
+
+  meta = with lib; {
+    description = "Easily write objects that delegate behavior";
+    homepage = "https://launchpad.net/lazr.delegates";
+    changelog = "https://git.launchpad.net/lazr.delegates/tree/NEWS.rst?h=${version}";
+    license = licenses.lgpl3Only;
   };
 }
diff --git a/pkgs/servers/mail/mailman/package.nix b/pkgs/servers/mail/mailman/package.nix
index 47d09bff6717..955c553d8a74 100644
--- a/pkgs/servers/mail/mailman/package.nix
+++ b/pkgs/servers/mail/mailman/package.nix
@@ -29,7 +29,7 @@ buildPythonPackage rec {
     flufl_i18n
     flufl_lock
     gunicorn
-    lazr_config
+    lazr-config
     passlib
     requests
     sqlalchemy
diff --git a/pkgs/top-level/python-aliases.nix b/pkgs/top-level/python-aliases.nix
index ecd5a40c38b7..0694ba52bcde 100644
--- a/pkgs/top-level/python-aliases.nix
+++ b/pkgs/top-level/python-aliases.nix
@@ -216,6 +216,8 @@ mapAliases ({
   Keras = keras; # added 2021-11-25
   ldap = python-ldap; # added 2022-09-16
   lammps-cython = throw "lammps-cython no longer builds and is unmaintained"; # added 2021-07-04
+  lazr_config = lazr-config; # added 2023-11-03
+  lazr_delegates = lazr-delegates; # added 2023-11-03
   lazy_imports = lazy-imports; # added 2023-10-13
   lektor = throw "lektor has been promoted to a top-level attribute"; # added 2023-08-01
   logilab_astng = throw "logilab-astng has not been released since 2013 and is unmaintained"; # added 2022-11-29
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 8a82d2c02296..bb93ae685244 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -6046,9 +6046,9 @@ self: super: with self; {
 
   layoutparser = callPackage ../development/python-modules/layoutparser { };
 
-  lazr_config = callPackage ../development/python-modules/lazr/config.nix { };
+  lazr-config = callPackage ../development/python-modules/lazr/config.nix { };
 
-  lazr_delegates = callPackage ../development/python-modules/lazr/delegates.nix { };
+  lazr-delegates = callPackage ../development/python-modules/lazr/delegates.nix { };
 
   lazr-restfulclient = callPackage ../development/python-modules/lazr-restfulclient { };