diff --git a/pkgs/development/libraries/qt-5/5.15/default.nix b/pkgs/development/libraries/qt-5/5.15/default.nix
index 56b7f86ba6c4..df60188800ab 100644
--- a/pkgs/development/libraries/qt-5/5.15/default.nix
+++ b/pkgs/development/libraries/qt-5/5.15/default.nix
@@ -313,7 +313,9 @@ let
 
       qmake = callPackage ({ qtbase }: makeSetupHook {
         name = "qmake-hook";
-        propagatedBuildInputs = [ qtbase.dev ];
+        ${if stdenv.buildPlatform == stdenv.hostPlatform
+          then "propagatedBuildInputs"
+          else "depsTargetTargetPropagated"} = [ qtbase.dev ];
         substitutions = {
           inherit debug;
           fix_qmake_libtool = ../hooks/fix-qmake-libtool.sh;