diff --git a/sdk_container/src/third_party/coreos-overlay/coreos/config/make.conf.amd64-host b/sdk_container/src/third_party/coreos-overlay/coreos/config/make.conf.amd64-host
index bc461ccdd2..13dedb25bb 100644
--- a/sdk_container/src/third_party/coreos-overlay/coreos/config/make.conf.amd64-host
+++ b/sdk_container/src/third_party/coreos-overlay/coreos/config/make.conf.amd64-host
@@ -4,9 +4,6 @@
 source "/mnt/host/source/.repo/manifests/version.txt"
 COREOS_VERSION_STRING="${COREOS_BUILD}.${COREOS_BRANCH}.${COREOS_PATCH}"
 
-# Tolerate collisions (for now), disable extra locking, ignore missing digests.
-FEATURES="-collision-protect -ebuild-locks -strict"
-
 # Since our portage comes from version control, we redirect distfiles
 DISTDIR="/var/lib/portage/distfiles"
 
diff --git a/sdk_container/src/third_party/coreos-overlay/coreos/config/make.conf.common-target b/sdk_container/src/third_party/coreos-overlay/coreos/config/make.conf.common-target
index 857480ab07..e849d3fb30 100644
--- a/sdk_container/src/third_party/coreos-overlay/coreos/config/make.conf.common-target
+++ b/sdk_container/src/third_party/coreos-overlay/coreos/config/make.conf.common-target
@@ -16,9 +16,6 @@ PORTAGE_TMPDIR=${ROOT}tmp/
 
 PORT_LOGDIR=${ROOT}tmp/portage/logs/
 
-# Tolerate collisions (for now), disable extra locking, ignore missing digests.
-FEATURES="-collision-protect -ebuild-locks -strict"
-
 PORTAGE_WORKDIR_MODE="0755"
 PKG_CONFIG_PATH="${ROOT}usr/lib/pkgconfig/:${ROOT}usr/share/pkgconfig/"