--- a/Makefile
+++ b/Makefile
@@ -20,7 +20,7 @@
 SHELL:=/usr/bin/env bash
 export LC_ALL=C
 export LANG=C
-export TOPDIR=${shell pwd}
+export TOPDIR=${CURDIR}
 ifeq ($(KBUILD_VERBOSE),99)
   MAKE:=3>/dev/null $(MAKE)
 endif

--- a/include/host.mk
+++ b/include/host.mk
@@ -23,11 +23,11 @@
 		echo "HOST_OS:=$$HOST_OS" > $@; \
 		echo "HOST_ARCH:=$$HOST_ARCH" >> $@; \
 		echo "GNU_HOST_NAME:=$$GNU_HOST_NAME" >> $@; \
-		TAR=`which gtar`; \
-		[ -n "$$TAR" -a -x "$$TAR" ] || TAR=`which tar`; \
+		TAR=`which gtar 2>/dev/null`; \
+		[ -n "$$TAR" -a -x "$$TAR" ] || TAR=`which tar 2>/dev/null`; \
 		echo "TAR:=$$TAR" >> $@; \
-		ZCAT=`which gzcat`; \
-		[ -n "$$ZCAT" -a -x "$$ZCAT" ] || ZCAT=`which zcat`; \
+		ZCAT=`which gzcat 2>/dev/null`; \
+		[ -n "$$ZCAT" -a -x "$$ZCAT" ] || ZCAT=`which zcat 2>/dev/null`; \
 		echo "ZCAT:=$$ZCAT" >> $@; \
 		echo "BASH:=$(shell which bash)" >> $@; \
 	)