diff --git a/pkgs/development/libraries/qt-6/default.nix b/pkgs/development/libraries/qt-6/default.nix
index 2610c8463b2e..a1d597adcd1d 100644
--- a/pkgs/development/libraries/qt-6/default.nix
+++ b/pkgs/development/libraries/qt-6/default.nix
@@ -164,7 +164,7 @@ let
       qtwayland = callPackage ./modules/qtwayland.nix { };
       qtwebchannel = callPackage ./modules/qtwebchannel.nix { };
       qtwebengine = callPackage ./modules/qtwebengine.nix {
-        inherit (darwin) bootstrap_cmds cctools xnu;
+        inherit (darwin) autoSignDarwinBinariesHook bootstrap_cmds cctools xnu;
         inherit (darwin.apple_sdk_11_0) libpm libunwind;
         inherit (darwin.apple_sdk_11_0.libs) sandbox;
         inherit (darwin.apple_sdk_11_0.frameworks)
diff --git a/pkgs/development/libraries/qt-6/modules/qtwebengine.nix b/pkgs/development/libraries/qt-6/modules/qtwebengine.nix
index affb512a22f2..8b9542511b72 100644
--- a/pkgs/development/libraries/qt-6/modules/qtwebengine.nix
+++ b/pkgs/development/libraries/qt-6/modules/qtwebengine.nix
@@ -60,6 +60,7 @@
 , mesa
 , enableProprietaryCodecs ? true
   # darwin
+, autoSignDarwinBinariesHook
 , bootstrap_cmds
 , cctools
 , xcbuild
@@ -105,6 +106,7 @@ qtModule {
     gn
     nodejs
   ] ++ lib.optionals stdenv.isDarwin [
+    autoSignDarwinBinariesHook
     bootstrap_cmds
     cctools
     xcbuild
@@ -185,16 +187,19 @@ qtModule {
     "-DQT_FEATURE_pdf_xfa_gif=ON"
     "-DQT_FEATURE_pdf_xfa_png=ON"
     "-DQT_FEATURE_pdf_xfa_tiff=ON"
-    "-DQT_FEATURE_webengine_system_icu=ON"
     "-DQT_FEATURE_webengine_system_libevent=ON"
-    "-DQT_FEATURE_webengine_system_libxml=ON"
     "-DQT_FEATURE_webengine_system_ffmpeg=ON"
     # android only. https://bugreports.qt.io/browse/QTBUG-100293
     # "-DQT_FEATURE_webengine_native_spellchecker=ON"
     "-DQT_FEATURE_webengine_sanitizer=ON"
     "-DQT_FEATURE_webengine_kerberos=ON"
   ] ++ lib.optionals stdenv.isLinux [
+    "-DQT_FEATURE_webengine_system_libxml=ON"
     "-DQT_FEATURE_webengine_webrtc_pipewire=ON"
+
+    # Appears not to work on some platforms
+    # https://github.com/Homebrew/homebrew-core/issues/104008
+    "-DQT_FEATURE_webengine_system_icu=ON"
   ] ++ lib.optionals enableProprietaryCodecs [
     "-DQT_FEATURE_webengine_proprietary_codecs=ON"
   ] ++ lib.optionals stdenv.isDarwin [
@@ -222,11 +227,9 @@ qtModule {
 
     # Text rendering
     harfbuzz
-    icu
 
     openssl
     glib
-    libxml2
     libxslt
     lcms2
 
@@ -241,6 +244,9 @@ qtModule {
     protobuf
     jsoncpp
 
+    icu
+    libxml2
+
     # Audio formats
     alsa-lib
     pulseaudio
diff --git a/pkgs/development/libraries/qt-6/patches/qtwebengine-libxml-2.12.patch b/pkgs/development/libraries/qt-6/patches/qtwebengine-libxml-2.12.patch
index 1fc7d837f8f3..3c3d59b488da 100644
--- a/pkgs/development/libraries/qt-6/patches/qtwebengine-libxml-2.12.patch
+++ b/pkgs/development/libraries/qt-6/patches/qtwebengine-libxml-2.12.patch
@@ -1,22 +1,29 @@
 --- a/src/3rdparty/chromium/third_party/blink/renderer/core/xml/xslt_processor.h
 +++ b/src/3rdparty/chromium/third_party/blink/renderer/core/xml/xslt_processor.h
-@@ -77,7 +77,7 @@ class XSLTProcessor final : public ScriptWrappable {
+@@ -77,7 +77,12 @@ class XSLTProcessor final : public ScriptWrappable {
  
    void reset();
  
--  static void ParseErrorFunc(void* user_data, xmlError*);
++#if LIBXML_VERSION >= 21200
 +  static void ParseErrorFunc(void* user_data, const xmlError*);
++#else
+   static void ParseErrorFunc(void* user_data, xmlError*);
++#endif
++
    static void GenericErrorFunc(void* user_data, const char* msg, ...);
  
    // Only for libXSLT callbacks
 --- a/src/3rdparty/chromium/third_party/blink/renderer/core/xml/xslt_processor_libxslt.cc
 +++ b/src/3rdparty/chromium/third_party/blink/renderer/core/xml/xslt_processor_libxslt.cc
-@@ -66,7 +66,7 @@ void XSLTProcessor::GenericErrorFunc(void*, const char*, ...) {
+@@ -66,7 +66,11 @@ void XSLTProcessor::GenericErrorFunc(void*, const char*, ...) {
    // It would be nice to do something with this error message.
  }
  
--void XSLTProcessor::ParseErrorFunc(void* user_data, xmlError* error) {
++#if LIBXML_VERSION >= 21200
 +void XSLTProcessor::ParseErrorFunc(void* user_data, const xmlError* error) {
++#else
+ void XSLTProcessor::ParseErrorFunc(void* user_data, xmlError* error) {
++#endif
    FrameConsole* console = static_cast<FrameConsole*>(user_data);
    if (!console)
      return;