Index: boot/arch/sparc64/Makefile.inc
===================================================================
--- boot/arch/sparc64/Makefile.inc	(revision d776329b69ef4b29a8601fe5affe7faa8c58b51d)
+++ boot/arch/sparc64/Makefile.inc	(revision 6c34be69eef6e892de7663ec0a2bacb932d8c72d)
@@ -39,4 +39,8 @@
 EXTRA_CFLAGS = -mcpu=ultrasparc -m64 -mno-fpu -mcmodel=medlow
 
+RD_DRVS_ESSENTIAL += \
+	platform/sun4u \
+	bus/pci/pciintel
+
 RD_SRVS_NON_ESSENTIAL +=