diff --git a/pkgs/development/libraries/qt-6/modules/qtbase.nix b/pkgs/development/libraries/qt-6/modules/qtbase.nix
index 5bbed5cb51e5..4f1825e441a4 100644
--- a/pkgs/development/libraries/qt-6/modules/qtbase.nix
+++ b/pkgs/development/libraries/qt-6/modules/qtbase.nix
@@ -270,7 +270,8 @@ stdenv.mkDerivation rec {
 
     # fixup .pc file (where to find 'moc' etc.)
     sed -i "$dev/lib/pkgconfig/Qt6Core.pc" \
-      -e "/^bindir=/ c bindir=$dev/bin"
+      -e "/^bindir=/ c bindir=$dev/bin" \
+      -e "/^libexecdir=/ c libexecdir=$dev/libexec"
 
     patchShebangs $out $dev
   '';