--- /usr/portage/app-emulation/xen-tools/xen-tools-4.8.0-r2.ebuild	2017-02-15 08:54:10.000000000 +0100
+++ xen-tools-4.8.0-r2.ebuild	2017-02-15 16:17:44.594920380 +0100
@@ -1,4 +1,4 @@
-# Copyright 1999-2017 Gentoo Foundation
+# Copyright 1999-2016 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 # $Id$
 
@@ -354,14 +354,19 @@
 	use system-seabios && myconf+=" --with-system-seabios=/usr/share/seabios/bios.bin"
 	use system-qemu && myconf+=" --with-system-qemu=/usr/bin/qemu-system-x86_64"
 	use amd64 && myconf+=" $(use_enable qemu-traditional)"
+	if 	use debug ; then
+		elog "attempt to enable debug"
+		cd xen || die
+		echo 'CONFIG_DEBUG=y' > .config
+		make olddefconfig
+		cd ..
+ 	fi
 	econf ${myconf}
 }
 
 src_compile() {
 	export VARTEXFONTS="${T}/fonts"
 	local myopt
-	use debug && myopt="${myopt} debug=y"
-
 	if test-flag-CC -fno-strict-overflow; then
 		append-flags -fno-strict-overflow
 	fi