--- crossdev-99999999/crossdev.orig	2016-04-02 19:35:41.000000000 +0200
+++ crossdev-99999999/crossdev	2016-04-02 19:36:52.000000000 +0200
@@ -7,15 +7,15 @@
 cd /
 umask 0022 #159111
 
-: ${ROOT:=/}
-if [[ ${ROOT} != "/" ]] ; then
+: ${ROOT:=@GENTOO_PORTAGE_EPREFIX@}
+if [[ ${ROOT} != "@GENTOO_PORTAGE_EPREFIX@" ]] ; then
 	echo "Sorry, but crossdev does not support ROOT." 1>&2
 	exit 2
 fi
 
-CONFIGROOT="${PORTAGE_CONFIGROOT}/etc/portage"
+CONFIGROOT="@GENTOO_PORTAGE_EPREFIX@${PORTAGE_CONFIGROOT}/etc/portage"
 
-source /lib/gentoo/functions.sh || exit 1
+source @GENTOO_PORTAGE_EPREFIX@/lib/gentoo/functions.sh || exit 1
 esyslog() { :; }
 die_logs() {
 	echo
@@ -392,7 +392,7 @@
 	fi
 
 	# make sure we have a valid logdir
-	: ${PORT_LOGDIR:=/var/log/portage}
+	: ${PORT_LOGDIR:=@GENTOO_PORTAGE_EPREFIX@/var/log/portage}
 	mkdir -p "${PORT_LOGDIR}"
 }
 
@@ -413,8 +413,8 @@
 	done
 	rm -rf "${CONFIGROOT}"/env/cross-${CTARGET}
 	rmdir "${CONFIGROOT}"/env 2>/dev/null
-	rm -f /etc/revdep-rebuild/05cross-${CTARGET}
-	rmdir /etc/revdep-rebuild 2>/dev/null
+	rm -f @GENTOO_PORTAGE_EPREFIX@/etc/revdep-rebuild/05cross-${CTARGET}
+	rmdir @GENTOO_PORTAGE_EPREFIX@/etc/revdep-rebuild 2>/dev/null
 
 	# Unmerge all toolchain packages for this target.
 	qmerge -Uqy $(qlist -IC "cross-${CTARGET}/")
@@ -425,29 +425,29 @@
 		gcc-{ar,nm,ranlib} gccbug gprof ld nm objcopy objdump \
 		ranlib readelf size strings strip windmc windres
 	do
-		rm -f /usr/bin/${CTARGET}-${f} /usr/${CTARGET}/bin/${f}
+		rm -f @GENTOO_PORTAGE_EPREFIX@/usr/bin/${CTARGET}-${f} @GENTOO_PORTAGE_EPREFIX@/usr/${CTARGET}/bin/${f}
 	done
-	rm -f /usr/${CTARGET}/{sys-include,usr}
-	rmdir /usr/${CTARGET}/{include/asm,include} 2>/dev/null
-	rm -f /usr/bin/${CTARGET}-{gcc,{c,g}++,cpp,gfortran,gcov}
-	rm -f /etc/env.d/{binutils,gcc}/config-${CTARGET}
+	rm -f @GENTOO_PORTAGE_EPREFIX@/usr/${CTARGET}/{sys-include,usr}
+	rmdir @GENTOO_PORTAGE_EPREFIX@/usr/${CTARGET}/{include/asm,include} 2>/dev/null
+	rm -f @GENTOO_PORTAGE_EPREFIX@/usr/bin/${CTARGET}-{gcc,{c,g}++,cpp,gfortran,gcov}
+	rm -f @GENTOO_PORTAGE_EPREFIX@/etc/env.d/{binutils,gcc}/config-${CTARGET}
 
 	# clean out files from crossdev itself
-	[[ -e /var/db/pkg/cross-${CTARGET} ]] && rmdir /var/db/pkg/cross-${CTARGET}
-	rm -f /usr/bin/${CTARGET}-{emerge,fix-root,pkg-config} /usr/bin/emerge-${CTARGET}
+	[[ -e @GENTOO_PORTAGE_EPREFIX@/var/db/pkg/cross-${CTARGET} ]] && rmdir @GENTOO_PORTAGE_EPREFIX@/var/db/pkg/cross-${CTARGET}
+	rm -f @GENTOO_PORTAGE_EPREFIX@/usr/bin/${CTARGET}-{emerge,fix-root,pkg-config} @GENTOO_PORTAGE_EPREFIX@/usr/bin/emerge-${CTARGET}
 
 	for f in make.{conf,globals,profile} ; do
-		f="/usr/${CTARGET}/etc/${f}"
+		f="@GENTOO_PORTAGE_EPREFIX@/usr/${CTARGET}/etc/${f}"
 		[[ -L ${f} ]] && rm -f ${f}
-		f="/usr/${CTARGET}/etc/portage/${f##*/}"
+		f="@GENTOO_PORTAGE_EPREFIX@/usr/${CTARGET}/etc/portage/${f##*/}"
 		[[ -L ${f} ]] && rm -f ${f}
 	done
-	find /usr/share/crossdev/etc/ -type f | \
+	find @GENTOO_PORTAGE_EPREFIX@/usr/share/crossdev/etc/ -type f | \
 	while read f ; do
 		f1=${f}
 		[[ ! -e ${f1} ]] && continue
 		m1=$(set -- `md5sum ${f1}`; echo $1)
-		f2=/usr/${CTARGET}${f#/usr/share/crossdev}
+		f2=@GENTOO_PORTAGE_EPREFIX@/usr/${CTARGET}${f#/usr/share/crossdev}
 		[[ ! -e ${f2} ]] && continue
 		m2=$(set -- `md5sum ${f2}`; echo $1)
 		if [[ ${m1} == ${m2} ]] ; then
@@ -456,7 +456,8 @@
 	done
 
 	# clean out the sysroot, prompting the user if need be
-	for d in /usr/lib/gcc{,-lib}/${CTARGET} /usr/${CTARGET} ; do
+	for d in @GENTOO_PORTAGE_EPREFIX@/usr/lib/gcc{,-lib}/${CTARGET} \
+			@GENTOO_PORTAGE_EPREFIX@/usr/${CTARGET} ; do
 		if [[ ! -d ${d} ]] ; then
 			rm -f "${d}"
 		else
@@ -959,7 +960,7 @@
 	output="env/cross-${CTARGET}/${pkg}.conf"
 	cat <<-EOF > "${output}"
 	SYMLINK_LIB=no
-	COLLISION_IGNORE="\${COLLISION_IGNORE} /usr/lib/debug/.build-id"
+	COLLISION_IGNORE="\${COLLISION_IGNORE} @GENTOO_PORTAGE_EPREFIX@/usr/lib/debug/.build-id"
 	$(printf '%b' "${env}")
 	$(printf '%b' "${AENV}")
 	EOF
@@ -1113,21 +1114,21 @@
 set_metadata
 
 # filter out revdep rebuild stuff #182601
-mkdir -p /etc/revdep-rebuild
-echo "SEARCH_DIRS_MASK=/usr/${CTARGET}" > /etc/revdep-rebuild/05cross-${CTARGET}
+mkdir -p @GENTOO_PORTAGE_EPREFIX@/etc/revdep-rebuild
+echo "SEARCH_DIRS_MASK=@GENTOO_PORTAGE_EPREFIX@/usr/${CTARGET}" > @GENTOO_PORTAGE_EPREFIX@/etc/revdep-rebuild/05cross-${CTARGET}
 
 hr
 
 #######################################
 ### Create links for helper scripts ###
 
-mkdir -p /usr/${CTARGET}
+mkdir -p @GENTOO_PORTAGE_EPREFIX@/usr/${CTARGET}
 emerge-wrapper --target ${CTARGET} --init || exit 1
 
 #################
 emerged_with_use() {
 	local pkg=$1 use=$2
-	grep -qs ${use} /var/db/pkg/cross-${CTARGET}/${pkg}-*/USE
+	grep -qs ${use} @GENTOO_PORTAGE_EPREFIX@/var/db/pkg/cross-${CTARGET}/${pkg}-*/USE
 }
 set_eopts_on_pkg_status() {
 	emerged_with_use "$@" \
--- crossdev-99999999/wrappers/cross-pkg-config.orig	2016-04-02 19:35:41.000000000 +0200
+++ crossdev-99999999/wrappers/cross-pkg-config	2016-04-02 19:36:02.000000000 +0200
@@ -59,7 +59,7 @@
 		EXTRA_PKG_CONFIG_LIBDIR=${UCLINUX_PKG_CONFIG_LIBDIR}
 	else
 		# /usr/<target>
-		SYSROOT="/usr/${CHOST}"
+		SYSROOT="@GENTOO_PORTAGE_EPREFIX@/usr/${CHOST}"
 		if [ -z "${CHOST}" ] || [ ! -d "${SYSROOT}" ] ; then
 			error "Need \$ROOT or \$STAGEDIR set first"
 		fi
--- crossdev-99999999/wrappers/etc/portage/make.conf.orig	2016-04-02 19:35:41.000000000 +0200
+++ crossdev-99999999/wrappers/etc/portage/make.conf	2016-04-02 19:36:02.000000000 +0200
@@ -4,7 +4,7 @@
 
 HOSTCC=__CBUILD__-gcc
 
-ROOT=/usr/${CHOST}/
+ROOT=@GENTOO_PORTAGE_EPREFIX@/usr/${CHOST}/
 
 ACCEPT_KEYWORDS="__ARCH__ ~__ARCH__"
 
--- crossdev-99999999/wrappers/cross-emerge
+++ crossdev-99999999/wrappers/cross-emerge
@@ -9,7 +9,7 @@ if [ -z "${CHOST}" ] ; then
 fi
 export CHOST
 
-: ${SYSROOT=/usr/${CHOST}}
+: ${SYSROOT=@GENTOO_PORTAGE_EPREFIX@/usr/${CHOST}}
 : ${PORTAGE_CONFIGROOT=${SYSROOT}}
 export SYSROOT PORTAGE_CONFIGROOT