Index: head/tools/boot/universe.sh
===================================================================
--- head/tools/boot/universe.sh	(revision 324978)
+++ head/tools/boot/universe.sh	(revision 324979)
@@ -1,38 +1,41 @@
 #!/bin/sh
 
 # $FreeBSD$
 
 #
 # Full list of all arches, but we only build a subset. All different mips add any
 # value, and there's a few others we just don't support.
 #
 #	mips/mipsel mips/mips mips/mips64el mips/mips64 mips/mipsn32 \
 #	mips/mipselhf mips/mipshf mips/mips64elhf mips/mips64hf \
 #	powerpc/powerpc powerpc/powerpc64 powerpc/powerpcspe \
 #	riscv/riscv64 riscv/riscv64sf
 #
 # This script is expected to be run in sys/boot (though you could run it anywhere
 # in the tree). It does a full clean build. For sys/boot you can do all the archs in
 # about a minute or two on a fast machine. It's also possible that you need a full
 # make universe for this to work completely.
 #
 # Output is put into _.boot.$TARGET_ARCH.log in sys.boot.
 #
 
+top=$(make -V SRCTOP)
+cd $top/sys/boot
+
 for i in \
 	amd64/amd64 \
 	arm/arm arm/armeb arm/armv7 \
 	arm64/aarch64 \
 	i386/i386 \
 	mips/mips mips/mips64 \
 	powerpc/powerpc powerpc/powerpc64 \
 	sparc64/sparc64 \
 	; do
     ta=${i##*/}
     echo -n "Building $ta..."
     ( ( make buildenv TARGET_ARCH=$ta BUILDENV_SHELL="make -j 20 clean cleandepend cleandir obj depend all" \
 	 > _.boot.${ta}.log 2>&1 ) && echo Success ) || echo Fail
 done