diff --git a/pkgs/applications/misc/bikeshed/default.nix b/pkgs/applications/misc/bikeshed/default.nix
index 244632521bac..955da0699299 100644
--- a/pkgs/applications/misc/bikeshed/default.nix
+++ b/pkgs/applications/misc/bikeshed/default.nix
@@ -2,57 +2,85 @@
 , buildPythonApplication
 , fetchPypi
 # build inputs
+, about-time
 , aiofiles
 , aiohttp
+, aiosignal
+, alive-progress
+, async-timeout
 , attrs
 , certifi
+, charset-normalizer
 , cssselect
+, frozenlist
 , html5lib
+, idna
 , isodate
 , json-home-client
+, kdl-py
 , lxml
+, multidict
 , pillow
 , pygments
 , requests
 , result
 , setuptools
+, six
 , tenacity
+, typing-extensions
+, uri-template
+, urllib3
+, webencodings
 , widlparser
+, yarl
 }:
 
 buildPythonApplication rec {
   pname = "bikeshed";
-  version = "3.7.0";
+  version = "4.2.7";
+  pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-3fVo+B71SsJs+XF4+FWH2nz0ouTnpC/02fXYr1C9Jrk=";
+    hash = "sha256-vtZ97brCk+fd/HsA2UHdS17o8rJ/VvSOdhg0MHzlCs8=";
   };
 
-  # Relax requirements from "==" to ">="
-  # https://github.com/tabatkins/bikeshed/issues/2178
-  postPatch = ''
-    substituteInPlace requirements.txt \
-      --replace "==" ">="
-  '';
+  build-system = [ setuptools ];
 
-  propagatedBuildInputs = [
+  pythonRelaxDeps = true;
+
+  dependencies = [
+    about-time
     aiofiles
     aiohttp
+    aiosignal
+    alive-progress
+    async-timeout
     attrs
     certifi
+    charset-normalizer
     cssselect
+    frozenlist
     html5lib
+    idna
     isodate
     json-home-client
+    kdl-py
     lxml
+    multidict
     pillow
     pygments
     requests
     result
     setuptools
+    six
     tenacity
+    typing-extensions
+    uri-template
+    urllib3
+    webencodings
     widlparser
+    yarl
   ];
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/kdl-py/default.nix b/pkgs/development/python-modules/kdl-py/default.nix
new file mode 100644
index 000000000000..df409677cc92
--- /dev/null
+++ b/pkgs/development/python-modules/kdl-py/default.nix
@@ -0,0 +1,37 @@
+{
+  lib,
+  buildPythonPackage,
+  fetchPypi,
+  setuptools,
+}:
+
+buildPythonPackage rec {
+  pname = "kdl-py";
+  version = "1.2.0";
+  pyproject = true;
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-Y/P0bGJ33trc5E3PyUZyv25r8zMLkBIuATTCKFfimXM=";
+  };
+
+  build-system = [ setuptools ];
+
+  pythonImportsCheck = [ "kdl" ];
+
+  checkPhase = ''
+    runHook preCheck
+
+    python tests/run.py
+
+    runHook postCheck
+  '';
+
+  meta = {
+    description = "Parser for the KDL language";
+    homepage = "https://github.com/tabatkins/kdlpy";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ ];
+    mainProgram = "kdlreformat";
+  };
+}
diff --git a/pkgs/development/python-modules/widlparser/default.nix b/pkgs/development/python-modules/widlparser/default.nix
index 688c14a024dc..9b961c89a9a9 100644
--- a/pkgs/development/python-modules/widlparser/default.nix
+++ b/pkgs/development/python-modules/widlparser/default.nix
@@ -4,31 +4,44 @@
   fetchFromGitHub,
   pythonOlder,
   # build inputs
+  setuptools,
+  setuptools-scm,
   typing-extensions,
 }:
 
 buildPythonPackage rec {
   pname = "widlparser";
-  version = "1.0.12";
-  format = "setuptools";
+  version = "1.1.5";
+  pyproject = true;
 
   disabled = pythonOlder "3.7";
 
   src = fetchFromGitHub {
     owner = "plinss";
-    repo = pname;
+    repo = "widlparser";
     rev = "v${version}";
-    hash = "sha256-T17fDWYd1naza/ao7kXWGcRIl2fzL1/Z9SaJiutZzqk=";
+    hash = "sha256-G5N29K0/ByfKwP1XfxZH9u/5x361JD/8qAD6eZaySnU=";
   };
 
-  postPatch = ''
-    sed -i -e 's/0.0.0/${version}/' setup.py
-  '';
+  build-system = [
+    setuptools
+    setuptools-scm
+  ];
 
-  propagatedBuildInputs = [ typing-extensions ];
+  dependencies = [ typing-extensions ];
 
   pythonImportsCheck = [ "widlparser" ];
 
+  # https://github.com/plinss/widlparser/blob/v1.1.5/.github/workflows/test.yml
+  checkPhase = ''
+    runHook preCheck
+
+    python test.py > test-actual.txt
+    diff -u test-expected.txt test-actual.txt
+
+    runHook postCheck
+  '';
+
   meta = with lib; {
     description = "Stand-alone WebIDL Parser in Python";
     homepage = "https://github.com/plinss/widlparser";
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 96d21cd07a88..6d751357daf4 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -6927,6 +6927,8 @@ self: super: with self; {
 
   kde-material-you-colors = callPackage ../development/python-modules/kde-material-you-colors { };
 
+  kdl-py = callPackage ../development/python-modules/kdl-py { };
+
   keba-kecontact = callPackage ../development/python-modules/keba-kecontact { };
 
   keep = callPackage ../development/python-modules/keep { };