diff --git a/arch/sandbox/Makefile b/arch/sandbox/Makefile
index a539a90..8155a79 100644
--- a/arch/sandbox/Makefile
+++ b/arch/sandbox/Makefile
@@ -31,11 +31,6 @@
 CPPFLAGS += $(patsubst %,-I$(srctree)/%include,$(machdirs))
 endif
 
-SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
-				  -e s/arm.*/arm/ -e s/sa110/arm/ \
-				  -e s/s390x/s390/ -e s/parisc64/parisc/ \
-				  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
-
 archprepare: maketools
 
 PHONY += maketools