diff --git a/sdk_container/src/third_party/coreos-overlay/coreos-base/vboot_reference/vboot_reference-9999.ebuild b/sdk_container/src/third_party/coreos-overlay/coreos-base/vboot_reference/vboot_reference-9999.ebuild
index 62fce99c02..b8f6cd82ae 100644
--- a/sdk_container/src/third_party/coreos-overlay/coreos-base/vboot_reference/vboot_reference-9999.ebuild
+++ b/sdk_container/src/third_party/coreos-overlay/coreos-base/vboot_reference/vboot_reference-9999.ebuild
@@ -11,7 +11,7 @@ DESCRIPTION="Chrome OS verified boot tools"
 
 LICENSE="BSD"
 SLOT="0"
-KEYWORDS="amd64 arm x86"
+KEYWORDS="~amd64 ~arm ~x86"
 IUSE="cros_host"
 
 RDEPEND="dev-libs/libyaml