diff --git a/pkgs/development/libraries/qgnomeplatform/default.nix b/pkgs/development/libraries/qgnomeplatform/default.nix
index 120621df9e62..22ba9ead8c96 100644
--- a/pkgs/development/libraries/qgnomeplatform/default.nix
+++ b/pkgs/development/libraries/qgnomeplatform/default.nix
@@ -62,6 +62,9 @@ stdenv.mkDerivation rec {
   cmakeFlags = [
     "-DGLIB_SCHEMAS_DIR=${glib.getSchemaPath gsettings-desktop-schemas}"
     "-DQT_PLUGINS_DIR=${placeholder "out"}/${qtbase.qtPluginPrefix}"
+
+    # Workaround CMake 4 compat
+    (lib.cmakeFeature "CMAKE_POLICY_VERSION_MINIMUM" "3.31")
   ]
   ++ lib.optionals useQt6 [
     "-DUSE_QT6=true"