diff --git a/pkgs/development/python-modules/pyqt/6.x.nix b/pkgs/development/python-modules/pyqt/6.x.nix
index b1bf34abd489..a44e8b89dfa9 100644
--- a/pkgs/development/python-modules/pyqt/6.x.nix
+++ b/pkgs/development/python-modules/pyqt/6.x.nix
@@ -2,11 +2,10 @@
   lib,
   stdenv,
   buildPythonPackage,
-  fetchurl,
+  fetchPypi,
   pkg-config,
   dbus,
   lndir,
-  setuptools,
   dbus-python,
   sip,
   pyqt6-sip,
@@ -25,15 +24,15 @@
 
 buildPythonPackage rec {
   pname = "pyqt6";
-  version = "6.8.0.dev2410141303";
-  format = "pyproject";
+  version = "6.8.0";
+  pyproject = true;
 
-  disabled = pythonOlder "3.6";
+  disabled = pythonOlder "3.9";
 
-  # This is dangerous, how can we get web archive to archive the URL?
-  src = fetchurl {
-    url = "https://riverbankcomputing.com/pypi/packages/PyQt6/PyQt6-${version}.tar.gz";
-    hash = "sha256-eHYqj22us07uFkErJD2d0y0wueZxtQTwTFW9cI7yoK4=";
+  src = fetchPypi {
+    pname = "PyQt6";
+    inherit version;
+    hash = "sha256-bYYo3kwqBQ8LdEYuTJy5f4Ob9v+rvKkXEXIv+ygVcNk=";
   };
 
   patches = [
@@ -45,6 +44,16 @@ buildPythonPackage rec {
     ./pyqt5-confirm-license.patch
   ];
 
+  build-system = [
+    sip
+    pyqt-builder
+  ];
+
+  dependencies = [
+    pyqt6-sip
+    dbus-python
+  ];
+
   # be more verbose
   # and normalize version
   postPatch = ''
@@ -53,11 +62,8 @@ buildPythonPackage rec {
     verbose = true
     EOF
 
-    # pythonRelaxDeps doesn't work and the wanted versions are not released AFAIK
     substituteInPlace pyproject.toml \
-      --replace-fail 'version = "${version}"' 'version = "${lib.versions.pad 3 version}"' \
-      --replace-fail "sip >=6.9, <7" "sip >=6.8.6, <7" \
-      --replace-fail 'PyQt-builder >=1.17, <2' "PyQt-builder >=1.16, <2"
+      --replace-fail 'version = "${version}"' 'version = "${lib.versions.pad 3 version}"'
   '';
 
   enableParallelBuilding = true;
@@ -83,7 +89,6 @@ buildPythonPackage rec {
     [
       pkg-config
       lndir
-      sip
       qtbase
       qtsvg
       qtdeclarative
@@ -104,7 +109,6 @@ buildPythonPackage rec {
       qtbase
       qtsvg
       qtdeclarative
-      pyqt-builder
       qtquick3d
       qtquicktimeline
     ]
@@ -113,13 +117,8 @@ buildPythonPackage rec {
     ++ lib.optional withLocation qtlocation;
 
   propagatedBuildInputs =
-    [
-      dbus-python
-      pyqt6-sip
-      setuptools
-    ]
     # ld: library not found for -lcups
-    ++ lib.optionals (withPrintSupport && stdenv.hostPlatform.isDarwin) [ cups ];
+    lib.optionals (withPrintSupport && stdenv.hostPlatform.isDarwin) [ cups ];
 
   passthru = {
     inherit sip pyqt6-sip;
diff --git a/pkgs/development/python-modules/pyqt6-charts/default.nix b/pkgs/development/python-modules/pyqt6-charts/default.nix
index 0ab27728f7af..b50651cfcc2b 100644
--- a/pkgs/development/python-modules/pyqt6-charts/default.nix
+++ b/pkgs/development/python-modules/pyqt6-charts/default.nix
@@ -13,15 +13,15 @@
 
 buildPythonPackage rec {
   pname = "pyqt6-charts";
-  version = "6.7.0";
-  format = "pyproject";
+  version = "6.8.0";
+  pyproject = true;
 
-  disabled = pythonOlder "3.6";
+  disabled = pythonOlder "3.9";
 
   src = fetchPypi {
     pname = "PyQt6_Charts";
     inherit version;
-    hash = "sha256-xPfPNpko978DLk4z9xjTuP5m2hdtSVn+MHNalw2G81w=";
+    hash = "sha256-+GcFuHQOMEFmfOIRrqogW3UOtrr0yQj04/bcjHINEPE=";
   };
 
   # fix include path and increase verbosity
@@ -46,16 +46,21 @@ buildPythonPackage rec {
 
   dontWrapQtApps = true;
 
-  nativeBuildInputs = with qt6Packages; [
-    qtcharts
+  build-system = [
     sip
-    qmake
     pyqt-builder
   ];
 
-  buildInputs = with qt6Packages; [ qtcharts ];
+  dependencies = [
+    pyqt6
+  ];
 
-  propagatedBuildInputs = [ pyqt6 ];
+  nativeBuildInputs = with qt6Packages; [
+    qtcharts
+    qmake
+  ];
+
+  buildInputs = with qt6Packages; [ qtcharts ];
 
   dontConfigure = true;
 
@@ -64,11 +69,11 @@ buildPythonPackage rec {
 
   pythonImportsCheck = [ "PyQt6.QtCharts" ];
 
-  meta = with lib; {
+  meta = {
     description = "Python bindings for Qt6 QtCharts";
     homepage = "https://riverbankcomputing.com/";
-    license = licenses.gpl3Only;
+    license = lib.licenses.gpl3Only;
     inherit (mesa.meta) platforms;
-    maintainers = with maintainers; [ dandellion ];
+    maintainers = with lib.maintainers; [ dandellion ];
   };
 }
diff --git a/pkgs/development/python-modules/pyqt6-webengine/default.nix b/pkgs/development/python-modules/pyqt6-webengine/default.nix
index 59a2a1eeab86..4f410a23626f 100644
--- a/pkgs/development/python-modules/pyqt6-webengine/default.nix
+++ b/pkgs/development/python-modules/pyqt6-webengine/default.nix
@@ -15,17 +15,21 @@
 
 buildPythonPackage rec {
   pname = "pyqt6-webengine";
-  version = "6.7.0";
-  format = "pyproject";
+  version = "6.8.0";
+  pyproject = true;
 
-  disabled = pythonOlder "3.6";
+  disabled = pythonOlder "3.9";
 
   src = fetchPypi {
     pname = "PyQt6_WebEngine";
     inherit version;
-    hash = "sha256-aO3HrbbZ4nX13pVogeecyg1x+tQ5q+qhDYI7/1rFUAE=";
+    hash = "sha256-ZARepiK2pBiCwrGPVa6XFLhmCs/walTpEOtygiwvP/I=";
   };
 
+  patches = [
+    ./qvariant.patch
+  ];
+
   # fix include path and increase verbosity
   postPatch = ''
     sed -i \
@@ -53,18 +57,23 @@ buildPythonPackage rec {
 
   dontWrapQtApps = true;
 
-  nativeBuildInputs = with qt6Packages; [
-    pkg-config
-    lndir
+  build-system = [
     sip
-    qtwebengine
-    qmake
     pyqt-builder
   ];
 
-  buildInputs = with qt6Packages; [ qtwebengine ];
+  dependencies = [
+    pyqt6
+  ];
 
-  propagatedBuildInputs = [ pyqt6 ];
+  nativeBuildInputs = with qt6Packages; [
+    pkg-config
+    lndir
+    qtwebengine
+    qmake
+  ];
+
+  buildInputs = with qt6Packages; [ qtwebengine ];
 
   passthru = {
     inherit sip;
@@ -80,12 +89,12 @@ buildPythonPackage rec {
     "PyQt6.QtWebEngineWidgets"
   ];
 
-  meta = with lib; {
+  meta = {
     description = "Python bindings for Qt6 WebEngine";
     homepage = "https://riverbankcomputing.com/";
-    license = licenses.gpl3Only;
+    license = lib.licenses.gpl3Only;
     inherit (mesa.meta) platforms;
-    maintainers = with maintainers; [
+    maintainers = with lib.maintainers; [
       LunNova
       nrdxp
     ];
diff --git a/pkgs/development/python-modules/pyqt6-webengine/qvariant.patch b/pkgs/development/python-modules/pyqt6-webengine/qvariant.patch
new file mode 100644
index 000000000000..b964a1e1cf2f
--- /dev/null
+++ b/pkgs/development/python-modules/pyqt6-webengine/qvariant.patch
@@ -0,0 +1,12 @@
+diff --git a/sip/QtWebEngineCore/qwebengineframe.sip b/sip/QtWebEngineCore/qwebengineframe.sip
+index d5420e6..5a29f29 100644
+--- a/sip/QtWebEngineCore/qwebengineframe.sip
++++ b/sip/QtWebEngineCore/qwebengineframe.sip
+@@ -26,6 +26,7 @@ class QWebEngineFrame /NoDefaultCtors/
+ {
+ %TypeHeaderCode
+ #include <qwebengineframe.h>
++#include <QVariant>
+ %End
+ 
+ public:
diff --git a/pkgs/development/python-modules/sip/default.nix b/pkgs/development/python-modules/sip/default.nix
index c0a828ab39c8..bf83c5c8c142 100644
--- a/pkgs/development/python-modules/sip/default.nix
+++ b/pkgs/development/python-modules/sip/default.nix
@@ -16,12 +16,12 @@
 
 buildPythonPackage rec {
   pname = "sip";
-  version = "6.9.0";
+  version = "6.9.1";
   pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-CT/Q4V2Zri+Kg91/fbqj/yUMWCp3644IRc2aytsfCTQ=";
+    hash = "sha256-eQS+UZDXh5lSVjt4o68OWPon2VJa9/U/k+rHqDtDPns=";
   };
 
   build-system = [