diff --git a/sdk_container/src/third_party/coreos-overlay/eclass/coreos-cargo.eclass b/sdk_container/src/third_party/coreos-overlay/eclass/coreos-cargo.eclass
index dc8fe32a54..e7fd90627e 100644
--- a/sdk_container/src/third_party/coreos-overlay/eclass/coreos-cargo.eclass
+++ b/sdk_container/src/third_party/coreos-overlay/eclass/coreos-cargo.eclass
@@ -1,4 +1,4 @@
-# Copyright 2017 CoreOS, Inc.
+# Copyright 2017-2018 CoreOS, Inc.
 # Distributed under the terms of the GNU General Public License v2
 
 # @ECLASS: coreos-cargo.eclass
@@ -18,7 +18,7 @@ inherit toolchain-funcs
 EXPORT_FUNCTIONS src_unpack
 
 [[ ${CATEGORY}/${PN} != dev-libs/rustlib ]] && DEPEND="|| (
-	dev-libs/rustlib
+	dev-libs/rustlib:=
 	dev-util/cargo
 )"