diff --git a/pkgs/development/libraries/qt-6/default.nix b/pkgs/development/libraries/qt-6/default.nix
index bef3f7ef62e86..d18678b9f5cde 100644
--- a/pkgs/development/libraries/qt-6/default.nix
+++ b/pkgs/development/libraries/qt-6/default.nix
@@ -1,6 +1,8 @@
 { newScope
 , lib
 , stdenv
+, generateSplicesForMkScope
+, makeScopeWithSplicing'
 , fetchurl
 , fetchpatch
 , fetchpatch2
@@ -12,6 +14,7 @@
 , overrideSDK
 , buildPackages
 , python3
+, config
 
   # options
 , developerBuild ? false
@@ -24,10 +27,11 @@ let
     mirror = "mirror://qt";
   };
 
-  addPackages = self: with self;
+  addPackages = self:
     let
       callPackage = self.newScope ({
-        inherit qtModule srcs python3;
+        inherit (self) qtModule;
+        inherit srcs python3;
         stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
       });
     in
@@ -58,7 +62,9 @@ let
         ];
       };
       env = callPackage ./qt-env.nix { };
-      full = env "qt-full-${qtbase.version}" ([
+      full = callPackage ({ env, qtbase }: env "qt-full-${qtbase.version}"
+      # `with self` is ok to use here because having these spliced is unnecessary
+      ( with self;[
         qt3d
         qt5compat
         qtcharts
@@ -96,7 +102,7 @@ let
         qtwebengine
         qtwebsockets
         qtwebview
-      ] ++ lib.optionals (!stdenv.isDarwin) [ qtwayland libglvnd ]);
+      ] ++ lib.optionals (!stdenv.isDarwin) [ qtwayland libglvnd ])) { };
 
       qt3d = callPackage ./modules/qt3d.nix { };
       qt5compat = callPackage ./modules/qt5compat.nix { };
@@ -149,11 +155,11 @@ let
           GameController ImageCaptureCore LocalAuthentication
           MediaAccessibility MediaPlayer MetalKit Network OpenDirectory Quartz
           ReplayKit SecurityInterface Vision;
-        qtModule = qtModule.override {
+        qtModule = callPackage ({ qtModule }: qtModule.override {
           stdenv = if stdenv.isDarwin
             then overrideSDK stdenv { darwinMinVersion = "10.13"; darwinSdkVersion = "11.0"; }
             else stdenv;
-        };
+        }) { };
         xcbuild = buildPackages.xcbuild.override {
           productBuildVer = "20A2408";
         };
@@ -163,26 +169,32 @@ let
         inherit (darwin.apple_sdk_11_0.frameworks) WebKit;
       };
 
-      wrapQtAppsHook = makeSetupHook
+      wrapQtAppsHook = callPackage ({ makeBinaryWrapper }: makeSetupHook
         {
           name = "wrap-qt6-apps-hook";
-          propagatedBuildInputs = [ buildPackages.makeBinaryWrapper ];
-        } ./hooks/wrap-qt-apps-hook.sh;
+          propagatedBuildInputs = [ makeBinaryWrapper ];
+        } ./hooks/wrap-qt-apps-hook.sh) { };
 
-      qmake = makeSetupHook
+      qmake = callPackage ({ qtbase }: makeSetupHook
         {
           name = "qmake6-hook";
-          propagatedBuildInputs = [ self.qtbase.dev ];
+          propagatedBuildInputs = [ qtbase.dev ];
           substitutions = {
             inherit debug;
             fix_qmake_libtool = ./hooks/fix-qmake-libtool.sh;
           };
-        } ./hooks/qmake-hook.sh;
+        } ./hooks/qmake-hook.sh) { };
+    } // lib.optionalAttrs config.allowAliases {
+      # Convert to a throw on 03-01-2023 and backport the change.
+      # Warnings show up in various cli tool outputs, throws do not.
+      # Remove completely before 24.05
+      overrideScope' = lib.warnIf (lib.isInOldestRelease 2311) "qt6 now uses makeScopeWithSplicing which does not have \"overrideScope'\", use \"overrideScope\"." self.overrideScope;
     };
 
-  # TODO(@Artturin): convert to makeScopeWithSplicing'
-  # simple example of how to do that in 5568a4d25ca406809530420996d57e0876ca1a01
-  baseScope = lib.makeScope newScope addPackages;
+  baseScope = makeScopeWithSplicing' {
+    otherSplices = generateSplicesForMkScope "qt6";
+    f = addPackages;
+  };
 
   bootstrapScope = baseScope.overrideScope(final: prev: {
     qtbase = prev.qtbase.override { qttranslations = null; };
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 0031ff1a5ec35..7ba022bb51e74 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -24662,7 +24662,7 @@ with pkgs;
   qt6 = recurseIntoAttrs (callPackage ../development/libraries/qt-6 { });
 
   qt6Packages = recurseIntoAttrs (import ./qt6-packages.nix {
-    inherit lib pkgs qt6;
+    inherit lib __splicedPackages makeScopeWithSplicing' generateSplicesForMkScope pkgsBuildHost;
     stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
   });
 
diff --git a/pkgs/top-level/qt5-packages.nix b/pkgs/top-level/qt5-packages.nix
index a9e25eb54a8ea..b1fb263e0bb83 100644
--- a/pkgs/top-level/qt5-packages.nix
+++ b/pkgs/top-level/qt5-packages.nix
@@ -266,8 +266,9 @@ in (noExtraAttrs (kdeFrameworks // plasmaMobileGear // plasma5 // plasma5.thirdP
 
   yuview = callPackage ../applications/video/yuview { };
 }) // lib.optionalAttrs pkgs.config.allowAliases {
-  # remove after 23.11 branch-off and backport removal to 23.11
-  # 23.11 will have a warning for this in `makeScope` itself
+  # Convert to a throw on 01-01-2023.
+  # Warnings show up in various cli tool outputs, throws do not.
+  # Remove completely before 24.05
   overrideScope' = lib.warn "libsForQt5 now uses makeScopeWithSplicing which does not have \"overrideScope'\", use \"overrideScope\"." self.overrideScope;
 }));
 }
diff --git a/pkgs/top-level/qt6-packages.nix b/pkgs/top-level/qt6-packages.nix
index 8490d2a20186a..2947083804d31 100644
--- a/pkgs/top-level/qt6-packages.nix
+++ b/pkgs/top-level/qt6-packages.nix
@@ -5,17 +5,27 @@
 # this file.
 
 { lib
-, pkgs
-, qt6
+, __splicedPackages
+, makeScopeWithSplicing'
+, generateSplicesForMkScope
 , stdenv
+, pkgsBuildHost
 }:
 
-(lib.makeScope pkgs.newScope ( self:
-
 let
-  callPackage = self.callPackage;
+  pkgs = __splicedPackages;
+  # qt6 set should not be pre-spliced to prevent spliced packages being a part of an unspliced set
+  # 'pkgsCross.aarch64-multiplatform.pkgsBuildTarget.targetPackages.qt6Packages.qtbase' should not have a `__spliced` but if qt6 is pre-spliced then it will have one.
+  # pkgsBuildHost == pkgs
+  qt6 = pkgsBuildHost.qt6;
 in
-(qt6 // {
+
+makeScopeWithSplicing' {
+  otherSplices = generateSplicesForMkScope "qt6Packages";
+  f = (self: let
+    inherit (self) callPackage;
+    noExtraAttrs = set: lib.attrsets.removeAttrs set [ "extend" "override" "overrideScope" "overrideScope'" "overrideDerivation" ];
+  in (noExtraAttrs qt6) // {
   inherit stdenv;
 
   # LIBRARIES
@@ -45,4 +55,11 @@ in
     qt6Support = true;
     suffix = "qt6";
   };
-})))
+
+  } // lib.optionalAttrs pkgs.config.allowAliases {
+    # Convert to a throw on 01-01-2023.
+    # Warnings show up in various cli tool outputs, throws do not.
+    # Remove completely before 24.05
+    overrideScope' = lib.warn "qt6Packages now uses makeScopeWithSplicing which does not have \"overrideScope'\", use \"overrideScope\"." self.overrideScope;
+  });
+}