diff --git a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.use b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.use
index 6ab37f4151..6dac7c3e0f 100644
--- a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.use
+++ b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.use
@@ -85,3 +85,6 @@ sys-fs/quota rpc
 
 # Don't bother building portage w/xattr, we don't need XATTR_PAX
 sys-apps/portage -xattr
+
+# Enable -M and -Z flags; -M is used by mayday
+sys-process/lsof rpc selinux