diff --git a/app-admin/coreboot-utils/coreboot-utils-4.18.ebuild b/app-admin/coreboot-utils/coreboot-utils-4.18-r1.ebuild
similarity index 94%
rename from app-admin/coreboot-utils/coreboot-utils-4.18.ebuild
rename to app-admin/coreboot-utils/coreboot-utils-4.18-r1.ebuild
index a9115a5fe9d99..f50dd5d15b0ac 100644
--- a/app-admin/coreboot-utils/coreboot-utils-4.18.ebuild
+++ b/app-admin/coreboot-utils/coreboot-utils-4.18-r1.ebuild
@@ -42,7 +42,8 @@ src_prepare() {
 	# force optimisation
 	# can't do this in one sed, because it all happens back-to-back
 	for e in '-O[01234567s]' '-g' '-Werror' '-ansi' '-pendantic' ; do
-		sed -i -e 's/ '"${e}"'\( \|$\)/ /g' util/*/Makefile{.inc,} || die
+		sed -i -e 's/\( \|=\)'"${e}"'\( \|$\)/\1/g' util/*/Makefile{.inc,} \
+			|| die
 	done
 }