diff --git a/pkgs/development/libraries/qt-5/5.9/qtwebengine/default.nix b/pkgs/development/libraries/qt-5/5.9/qtwebengine/default.nix
index c0b9aa83e194..f001f64db3fe 100644
--- a/pkgs/development/libraries/qt-5/5.9/qtwebengine/default.nix
+++ b/pkgs/development/libraries/qt-5/5.9/qtwebengine/default.nix
@@ -101,6 +101,9 @@ qtSubmodule {
   ];
   patches = optional stdenv.needsPax ./qtwebengine-paxmark-mksnapshot.patch;
 
+  # NSS header layout change
+  NIX_CFLAGS_COMPILE = [ "-I${nss.dev}/include/nss" ];
+
   dontUseNinjaBuild = true;
   dontUseNinjaInstall = true;