diff --git a/pkgs/applications/audio/csound/csound-qt/default.nix b/pkgs/applications/audio/csound/csound-qt/default.nix
index e48b45aec3e4..c2c9432eaeb0 100644
--- a/pkgs/applications/audio/csound/csound-qt/default.nix
+++ b/pkgs/applications/audio/csound/csound-qt/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, csound, desktop-file-utils,
-  fetchFromGitHub, python, python-qt, qmake,
+  fetchFromGitHub, python3, python-qt, qmake,
   qtwebengine, qtxmlpatterns, rtmidi, wrapQtAppsHook }:
 
 stdenv.mkDerivation rec {
@@ -26,13 +26,13 @@ stdenv.mkDerivation rec {
                  "CSOUND_INCLUDE_DIR=${csound}/include/csound"
                  "CSOUND_LIBRARY_DIR=${csound}/lib"
                  "RTMIDI_DIR=${rtmidi.src}"
-                 "PYTHONQT_SRC_DIR=${python-qt}/include/PythonQt"
+                 "PYTHONQT_SRC_DIR=${python-qt.src}"
                  "PYTHONQT_LIB_DIR=${python-qt}/lib"
                  "LIBS+=-L${python-qt}/lib"
-                 "INCLUDEPATH+=${python-qt}/include/PythonQt"
-                 "INCLUDEPATH+=${python}/include/python${python.pythonVersion}"
                  "INSTALL_DIR=${placeholder "out"}"
                  "SHARE_DIR=${placeholder "out"}/share"
+                 "PYTHON_DIR=${python3}"
+                 "PYTHON_VERSION=3.${python3.sourceVersion.minor}"
                  ];
 
   meta = with lib; {
diff --git a/pkgs/development/libraries/python-qt/default.nix b/pkgs/development/libraries/python-qt/default.nix
index d238b8137d33..16c2124cf083 100644
--- a/pkgs/development/libraries/python-qt/default.nix
+++ b/pkgs/development/libraries/python-qt/default.nix
@@ -1,39 +1,42 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, python, qmake,
-  qtwebengine, qtxmlpatterns,
-  qttools, unzip }:
+{
+  lib,
+  stdenv,
+  fetchFromGitHub,
+  fetchpatch,
+  python3,
+  qmake,
+  qtwebengine,
+  qtxmlpatterns,
+  qttools,
+}:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: {
   pname = "python-qt";
-  version = "3.4.2";
+  version = "3.5.1";
 
   src = fetchFromGitHub {
     owner = "MeVisLab";
     repo = "pythonqt";
-    rev = "v${version}";
-    hash = "sha256-xJYOD07ACOKtY3psmfHNSCjm6t0fr8JU9CrL0w5P5G0=";
+    rev = "v${finalAttrs.version}";
+    hash = "sha256-IED6UFk8UTle7g/yPC0nXOEgJwrs6sB/Dk3OTyVgHPo=";
   };
 
-  # https://github.com/CsoundQt/CsoundQt/blob/develop/BUILDING.md#pythonqt
-  postPatch = ''
-    substituteInPlace build/python.prf \
-      --replace "PYTHON_VERSION=2.7" "PYTHON_VERSION=${python.pythonVersion}"
-  '';
+  nativeBuildInputs = [
+    qmake
+    qttools
+    qtxmlpatterns
+    qtwebengine
+  ];
 
-  hardeningDisable = [ "all" ];
-
-  nativeBuildInputs = [ qmake qtwebengine qtxmlpatterns qttools unzip ];
-
-  buildInputs = [ python ];
+  buildInputs = [ python3 ];
 
   qmakeFlags = [
-    "PythonQt.pro"
-    "PYTHON_DIR=${python}"
+    "PYTHON_DIR=${python3}"
+    "PYTHON_VERSION=3.${python3.sourceVersion.minor}"
   ];
 
   dontWrapQtApps = true;
 
-  unpackCmd = "unzip $src";
-
   installPhase = ''
     mkdir -p $out/include/PythonQt
     cp -r ./lib $out
@@ -42,6 +45,15 @@ stdenv.mkDerivation rec {
     cp -r ./extensions $out/include/PythonQt
   '';
 
+  preFixup = lib.optionalString stdenv.isDarwin ''
+    install_name_tool -id \
+      $out/lib/libPythonQt-Qt5-Python3.${python3.sourceVersion.minor}.dylib \
+      $out/lib/libPythonQt-Qt5-Python3.${python3.sourceVersion.minor}.dylib
+    install_name_tool -id \
+      $out/lib/libPythonQt_QtAll-Qt5-Python3.${python3.sourceVersion.minor}.dylib \
+      $out/lib/libPythonQt_QtAll-Qt5-Python3.${python3.sourceVersion.minor}.dylib
+  '';
+
   meta = with lib; {
     description = "PythonQt is a dynamic Python binding for the Qt framework. It offers an easy way to embed the Python scripting language into your C++ Qt applications";
     homepage = "https://pythonqt.sourceforge.net/";
@@ -49,4 +61,4 @@ stdenv.mkDerivation rec {
     platforms = platforms.all;
     maintainers = with maintainers; [ hlolli ];
   };
-}
+})
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index dc83c7246644..9c0846d71df7 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -24071,16 +24071,7 @@ with pkgs;
 
   pylode = callPackage ../misc/pylode { };
 
-  python-qt = (callPackage ../development/libraries/python-qt {
-    python = python3;
-    inherit (builtins.mapAttrs (_: pkg: pkg.override (previousArgs: lib.optionalAttrs (previousArgs ? stdenv) { stdenv = gcc12Stdenv; })) qt5)
-      qmake qttools qtwebengine qtxmlpatterns;
-    stdenv = gcc12Stdenv;
-  })
-  .overrideAttrs(previousAttrs: {
-    NIX_CFLAGS_COMPILE = "-w";
-    meta = previousAttrs.meta // { broken = true; };
-  });
+  python-qt = libsForQt5.callPackage ../development/libraries/python-qt { };
 
   pyotherside = libsForQt5.callPackage ../development/libraries/pyotherside { };
 
@@ -30344,9 +30335,7 @@ with pkgs;
 
   csound-manual = callPackage ../applications/audio/csound/csound-manual { };
 
-  csound-qt = libsForQt5.callPackage ../applications/audio/csound/csound-qt {
-    python = python3;
-  };
+  csound-qt = libsForQt5.callPackage ../applications/audio/csound/csound-qt { };
 
   codeblocks = callPackage ../applications/editors/codeblocks { };
   codeblocksFull = codeblocks.override { contribPlugins = true; };