diff --git a/sdk_container/src/third_party/portage-stable/sys-apps/sed/sed-4.9-r1.ebuild b/sdk_container/src/third_party/portage-stable/sys-apps/sed/sed-4.9-r1.ebuild
index 564b3f9c37..9129b5a483 100644
--- a/sdk_container/src/third_party/portage-stable/sys-apps/sed/sed-4.9-r1.ebuild
+++ b/sdk_container/src/third_party/portage-stable/sys-apps/sed/sed-4.9-r1.ebuild
@@ -35,8 +35,12 @@ BDEPEND="nls? ( sys-devel/gettext )
 
 src_prepare() {
 	default
-	# Modern C fixes from latest autotools. bug #900382
-	eautoreconf
+
+	# Ignore prefix as a workaround for bug #934329
+	if ! use prefix ; then
+		# Modern C fixes from latest autotools. bug #900382
+		eautoreconf
+	fi
 }
 
 src_configure() {