--- a/src/core/gn_run.pro
+++ b/src/core/gn_run.pro
@@ -64,6 +64,7 @@
         }
     } else {
         gn_args+= "qtwebengine_target=\"$$system_path($$OUT_PWD/$$getConfigDir()):QtWebEngineCore\""
+        gn_args += $$(EXTRA_GN)
         gn_args = $$system_quote($$gn_args)
         gn_build_root = $$system_quote($$system_path($$OUT_PWD/$$getConfigDir()))
         gn_run = $$gn_binary gen $$gn_build_root $$gn_python --args=$$gn_args --root=$$gn_src_root