diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 2044c4005557..c1246415e951 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -10482,7 +10482,7 @@ with pkgs;
   qt6 = recurseIntoAttrs (callPackage ../development/libraries/qt-6 { });
 
   qt6Packages = recurseIntoAttrs (import ./qt6-packages.nix {
-    inherit lib __splicedPackages makeScopeWithSplicing' generateSplicesForMkScope pkgsHostTarget kdePackages;
+    inherit lib config __splicedPackages makeScopeWithSplicing' generateSplicesForMkScope pkgsHostTarget kdePackages;
     inherit stdenv;
   });
 
diff --git a/pkgs/top-level/qt6-packages.nix b/pkgs/top-level/qt6-packages.nix
index 51e303ca3857..0834419e13bd 100644
--- a/pkgs/top-level/qt6-packages.nix
+++ b/pkgs/top-level/qt6-packages.nix
@@ -5,6 +5,7 @@
 # this file.
 
 { lib
+, config
 , __splicedPackages
 , makeScopeWithSplicing'
 , generateSplicesForMkScope
@@ -124,6 +125,6 @@ makeScopeWithSplicing' {
 
   xwaylandvideobridge = kdePackages.callPackage ../tools/wayland/xwaylandvideobridge { };
   });
-} // {
+} // lib.optionalAttrs config.allowAliases {
   stdenv = lib.warn "qt6Packages.stdenv is deprecated. Use stdenv instead." stdenv; # Added for 25.05
 }