diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index bad55455b234..0e79ff1d8624 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -9526,30 +9526,32 @@ with pkgs;
     developerBuild = true;
   });
 
-  qt56 = recurseIntoAttrs (import ../development/libraries/qt-5/5.6 {
-    inherit newScope;
-    inherit stdenv fetchurl makeSetupHook makeWrapper;
-    bison = bison2; # error: too few arguments to function 'int yylex(...
-    inherit cups;
-    harfbuzz = harfbuzz-icu;
-    mesa = mesa_noglu;
-    inherit perl;
-    inherit (gst_all_1) gstreamer gst-plugins-base;
-  });
+  qt56 = recurseIntoAttrs (makeOverridable
+    (import ../development/libraries/qt-5/5.6) {
+      inherit newScope;
+      inherit stdenv fetchurl makeSetupHook makeWrapper;
+      bison = bison2; # error: too few arguments to function 'int yylex(...
+      inherit cups;
+      harfbuzz = harfbuzz-icu;
+      mesa = mesa_noglu;
+      inherit perl;
+      inherit (gst_all_1) gstreamer gst-plugins-base;
+    });
 
   libsForQt56 = recurseIntoAttrs (lib.makeScope qt56.newScope mkLibsForQt5);
 
-  qt58 = recurseIntoAttrs (import ../development/libraries/qt-5/5.8 {
-    inherit newScope;
-    inherit stdenv fetchurl makeSetupHook makeWrapper;
-    bison = bison2; # error: too few arguments to function 'int yylex(...
-    inherit cups;
-    harfbuzz = harfbuzz-icu;
-    mesa = mesa_noglu;
-    inherit perl;
-    inherit (gst_all_1) gstreamer gst-plugins-base;
-    inherit (gnome3) gtk3 dconf;
-  });
+  qt58 = recurseIntoAttrs (makeOverridable
+    (import ../development/libraries/qt-5/5.8) {
+      inherit newScope;
+      inherit stdenv fetchurl makeSetupHook makeWrapper;
+      bison = bison2; # error: too few arguments to function 'int yylex(...
+      inherit cups;
+      harfbuzz = harfbuzz-icu;
+      mesa = mesa_noglu;
+      inherit perl;
+      inherit (gst_all_1) gstreamer gst-plugins-base;
+      inherit (gnome3) gtk3 dconf;
+    });
 
   libsForQt58 = recurseIntoAttrs (lib.makeScope qt58.newScope mkLibsForQt5);