--- app-emulation/xen-tools/xen-tools-3.1.0.ebuild
+++ app-emulation/xen-tools/xen-tools-3.1.0.ebuild
@@ -120,6 +120,9 @@
 
 	# Fix building small dumb utility called 'xen-detect' on hardened
 	epatch "${FILESDIR}/${PN}-3.1.0-xen-detect-nopie-fix.patch"
+
+	# Delete -Werror
+	epatch "${FILESDIR}/${PN}-3.1.0-delete-Werror.patch"
 }
 
 src_compile() {