diff --git a/pkgs/development/python-modules/lazr/config.nix b/pkgs/development/python-modules/lazr-config/default.nix
similarity index 69%
rename from pkgs/development/python-modules/lazr/config.nix
rename to pkgs/development/python-modules/lazr-config/default.nix
index 1b5520b79b35..acde7d6b1c34 100644
--- a/pkgs/development/python-modules/lazr/config.nix
+++ b/pkgs/development/python-modules/lazr-config/default.nix
@@ -1,7 +1,7 @@
 {
   lib,
   buildPythonPackage,
-  fetchPypi,
+  fetchgit,
   setuptools,
   lazr-delegates,
   zope-interface,
@@ -10,18 +10,18 @@
 
 buildPythonPackage rec {
   pname = "lazr-config";
-  version = "3.0";
+  version = "3.1";
   pyproject = true;
 
-  src = fetchPypi {
-    pname = "lazr.config";
-    inherit version;
-    hash = "sha256-oU5PbMCa68HUCxdhWK6g7uIlLBQAO40O8LMcfFFMNkQ=";
+  src = fetchgit {
+    url = "https://git.launchpad.net/lazr.config";
+    rev = "3c659114e8e947fbd46954336f5577351d786de9";
+    hash = "sha256-eYJY4JRoqTMG4j1jyiYrI8xEKdJ+wQYVVU/6OqVIodk=";
   };
 
-  nativeBuildInputs = [ setuptools ];
+  build-system = [ setuptools ];
 
-  propagatedBuildInputs = [
+  dependencies = [
     lazr-delegates
     zope-interface
   ];
@@ -38,10 +38,10 @@ buildPythonPackage rec {
 
   pythonNamespaces = [ "lazr" ];
 
-  meta = with lib; {
+  meta = {
     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;
+    license = lib.licenses.lgpl3Only;
   };
 }
diff --git a/pkgs/development/python-modules/lazr/delegates.nix b/pkgs/development/python-modules/lazr-delegates/default.nix
similarity index 68%
rename from pkgs/development/python-modules/lazr/delegates.nix
rename to pkgs/development/python-modules/lazr-delegates/default.nix
index 1ebec55d7d16..a2a922b8ddf2 100644
--- a/pkgs/development/python-modules/lazr/delegates.nix
+++ b/pkgs/development/python-modules/lazr-delegates/default.nix
@@ -9,18 +9,18 @@
 
 buildPythonPackage rec {
   pname = "lazr-delegates";
-  version = "2.1.0";
+  version = "2.1.1";
   pyproject = true;
 
   src = fetchPypi {
-    pname = "lazr.delegates";
+    pname = "lazr_delegates";
     inherit version;
-    hash = "sha256-UNT7iHK5UuV6SOEmEOVQ+jBm7rV8bGx1tqUUJBi6wZw=";
+    hash = "sha256-rs6yYW5Rtz8yf78SxOwrfXZwy4IL1eT2hRIV+3lsAtw=";
   };
 
-  nativeBuildInputs = [ setuptools ];
+  build-system = [ setuptools ];
 
-  propagatedBuildInputs = [ zope-interface ];
+  dependencies = [ zope-interface ];
 
   pythonImportsCheck = [ "lazr.delegates" ];
 
@@ -28,10 +28,10 @@ buildPythonPackage rec {
 
   pythonNamespaces = [ "lazr" ];
 
-  meta = with lib; {
+  meta = {
     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;
+    license = lib.licenses.lgpl3Only;
   };
 }
diff --git a/pkgs/development/python-modules/lazr-restfulclient/default.nix b/pkgs/development/python-modules/lazr-restfulclient/default.nix
index e6f1e9f208ff..cd0b2508a4b5 100644
--- a/pkgs/development/python-modules/lazr-restfulclient/default.nix
+++ b/pkgs/development/python-modules/lazr-restfulclient/default.nix
@@ -1,7 +1,6 @@
 {
   lib,
   buildPythonPackage,
-  isPy27,
   fetchPypi,
   distro,
   httplib2,
@@ -16,17 +15,19 @@
 }:
 
 buildPythonPackage rec {
-  pname = "lazr.restfulclient";
+  pname = "lazr-restfulclient";
   version = "0.14.6";
-
-  disabled = isPy27; # namespace is broken for python2
+  pyproject = true;
 
   src = fetchPypi {
-    inherit pname version;
+    pname = "lazr.restfulclient";
+    inherit version;
     hash = "sha256-Q/EqHTlIRjsUYgOMR7Qp3LXkLgun8uFlEbArpdKt/9s=";
   };
 
-  propagatedBuildInputs = [
+  build-system = [ setuptools ];
+
+  dependencies = [
     distro
     httplib2
     oauthlib
@@ -46,10 +47,13 @@ buildPythonPackage rec {
 
   pythonImportsCheck = [ "lazr.restfulclient" ];
 
-  meta = with lib; {
+  pythonNamespaces = [ "lazr" ];
+
+  meta = {
     description = "Programmable client library that takes advantage of the commonalities among";
     homepage = "https://launchpad.net/lazr.restfulclient";
-    license = licenses.lgpl3;
+    changelog = "https://git.launchpad.net/lazr.restfulclient/tree/NEWS.rst?h=${version}";
+    license = lib.licenses.lgpl3Plus;
     maintainers = [ ];
   };
 }
diff --git a/pkgs/development/python-modules/lazr-uri/default.nix b/pkgs/development/python-modules/lazr-uri/default.nix
index f714fa9ccd49..34f63c921fb0 100644
--- a/pkgs/development/python-modules/lazr-uri/default.nix
+++ b/pkgs/development/python-modules/lazr-uri/default.nix
@@ -1,28 +1,37 @@
 {
   lib,
   buildPythonPackage,
-  isPy27,
   fetchPypi,
   setuptools,
+  pytestCheckHook,
 }:
 
 buildPythonPackage rec {
-  pname = "lazr.uri";
-  version = "1.0.6";
-
-  disabled = isPy27; # namespace is broken for python2
+  pname = "lazr-uri";
+  version = "1.0.7";
+  pyproject = true;
 
   src = fetchPypi {
-    inherit pname version;
-    sha256 = "5026853fcbf6f91d5a6b11ea7860a641fe27b36d4172c731f4aa16b900cf8464";
+    pname = "lazr_uri";
+    inherit version;
+    hash = "sha256-7Qz28zPkUBFHUq+xzgwpnDasSxCQY+tQNUxPh/glo+4=";
   };
 
-  propagatedBuildInputs = [ setuptools ];
+  build-system = [ setuptools ];
 
-  meta = with lib; {
+  dependencies = [ setuptools ];
+
+  pythonImportsCheck = [ "lazr.uri" ];
+
+  nativeCheckInputs = [ pytestCheckHook ];
+
+  pythonNamespaces = [ "lazr" ];
+
+  meta = {
     description = "Self-contained, easily reusable library for parsing, manipulating";
     homepage = "https://launchpad.net/lazr.uri";
-    license = licenses.lgpl3;
+    changelog = "https://git.launchpad.net/lazr.uri/tree/NEWS.rst?h=${version}";
+    license = lib.licenses.lgpl3Only;
     maintainers = [ ];
   };
 }
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index bf35154dd616..39b7f679e2c6 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -7147,9 +7147,9 @@ 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 { };
 
-  lazr-delegates = callPackage ../development/python-modules/lazr/delegates.nix { };
+  lazr-delegates = callPackage ../development/python-modules/lazr-delegates { };
 
   lazr-restfulclient = callPackage ../development/python-modules/lazr-restfulclient { };