diff --git a/pkgs/development/libraries/qt-6/modules/qtbase.nix b/pkgs/development/libraries/qt-6/modules/qtbase.nix
index 1f8b346f79c5..4a4ebb320757 100644
--- a/pkgs/development/libraries/qt-6/modules/qtbase.nix
+++ b/pkgs/development/libraries/qt-6/modules/qtbase.nix
@@ -178,7 +178,6 @@ stdenv.mkDerivation rec {
   ] ++ lib.optional libGLSupported libGL;
 
   buildInputs = [
-    python3
     at-spi2-core
   ] ++ lib.optionals (!stdenv.isDarwin) [
     libinput
@@ -197,6 +196,8 @@ stdenv.mkDerivation rec {
 
   propagatedNativeBuildInputs = [ lndir ];
 
+  strictDeps = true;
+
   enableParallelBuilding = true;
 
   inherit patches;