Index: Makefile.inc1
===================================================================
--- Makefile.inc1	(revision 280687)
+++ Makefile.inc1	(working copy)
@@ -2058,7 +2058,7 @@
 #
 builddtb:
 	@PATH=${TMPPATH} MACHINE=${TARGET} \
-	${.CURDIR}/sys/tools/fdt/make_dtb.sh ${.CURDIR}/sys \
+	sh ${.CURDIR}/sys/tools/fdt/make_dtb.sh ${.CURDIR}/sys \
 	    "${FDT_DTS_FILE}" ${DTBOUTPUTPATH}
 
 ###############
Index: sys/boot/fdt/dts/Makefile.inc
===================================================================
--- sys/boot/fdt/dts/Makefile.inc	(revision 280687)
+++ sys/boot/fdt/dts/Makefile.inc	(working copy)
@@ -4,7 +4,7 @@
 
 test-dts:
 .for dts in ${DTS}
-	@env MACHINE=`basename ${.CURDIR}` ${SYSDIR}/tools/fdt/make_dtb.sh ${SYSDIR} ${dts} /tmp
+	@env MACHINE=`basename ${.CURDIR}` sh ${SYSDIR}/tools/fdt/make_dtb.sh ${SYSDIR} ${dts} /tmp
 
 .endfor
 
Index: sys/conf/dtb.mk
===================================================================
--- sys/conf/dtb.mk	(revision 280687)
+++ sys/conf/dtb.mk	(working copy)
@@ -53,7 +53,7 @@
 .for _dts in ${DTS}
 ${_dts:R:S/$/.dtb/}:	${_dts}
 	@echo Generating ${.TARGET} from ${_dts}
-	@${SYSDIR}/tools/fdt/make_dtb.sh ${SYSDIR} ${_dts} ${.OBJDIR}
+	@sh ${SYSDIR}/tools/fdt/make_dtb.sh ${SYSDIR} ${_dts} ${.OBJDIR}
 CLEANFILES+=${_dts:R:S/$/.dtb/}
 .endfor
 .endif
Index: sys/conf/files
===================================================================
--- sys/conf/files	(revision 280687)
+++ sys/conf/files	(working copy)
@@ -14,11 +14,11 @@
 # from the specified source (DTS) file: <platform>.dts -> <platform>.dtb
 #
 fdt_dtb_file			optional fdt fdt_dtb_static \
-	compile-with "sh -c 'MACHINE=${MACHINE} $S/tools/fdt/make_dtb.sh $S ${FDT_DTS_FILE} ${.CURDIR}'" \
+	compile-with "sh -c 'MACHINE=${MACHINE} sh $S/tools/fdt/make_dtb.sh $S ${FDT_DTS_FILE} ${.CURDIR}'" \
 	no-obj no-implicit-rule before-depend	\
 	clean		"${FDT_DTS_FILE:R}.dtb"
 fdt_static_dtb.h		optional fdt fdt_dtb_static \
-	compile-with "sh -c 'MACHINE=${MACHINE} $S/tools/fdt/make_dtbh.sh ${FDT_DTS_FILE} ${.CURDIR}'" \
+	compile-with "sh -c 'MACHINE=${MACHINE} sh $S/tools/fdt/make_dtbh.sh ${FDT_DTS_FILE} ${.CURDIR}'" \
 	dependency	"fdt_dtb_file" \
 	no-obj no-implicit-rule before-depend \
 	clean		"fdt_static_dtb.h"