Index: /trunk/Config.kmk
===================================================================
--- /trunk/Config.kmk	(revision 26218)
+++ /trunk/Config.kmk	(revision 26219)
@@ -478,6 +478,11 @@
 # Set this to skip installing the redistributable compiler runtime.
 #VBOX_WITHOUT_COMPILER_REDIST = 1
-## For treating compiler and linker warnings as errors where possible.
-if1of ($(USERNAME), bird)
+## @}
+
+
+## @name Compiler and linker config
+## @{
+# For treating compiler and linker warnings as errors where possible.
+if1of ($(KBUILD_TARGET), darwin) # more to come here later.
  VBOX_WITH_WARNINGS_AS_ERRORS = 1
 endif