jeromq: Runtime Exception w/ Java 8 Lambas in Android

I did a build from the latest master snapshot on Github, and ran into this error when receiving data on the REP socket.

I/art: Rejecting re-init on previously-failed class java.lang.Class<zmq.io.StreamEngine$ProducePongMessage>
    Rejecting re-init on previously-failed class java.lang.Class<zmq.io.StreamEngine$ProducePongMessage>
I/art: Rejecting re-init on previously-failed class java.lang.Class<zmq.io.-$$Lambda$StreamEngine$W0Gv5o5INYywwEmQ5W1uv6x5Tgw>
E/AndroidRuntime: FATAL EXCEPTION: iothread-2
    Process: com.ravn.havoc, PID: 21413
    java.lang.NoClassDefFoundError: zmq.io.-$$Lambda$StreamEngine$W0Gv5o5INYywwEmQ5W1uv6x5Tgw
        at zmq.io.StreamEngine.<init>(StreamEngine.java:865)
        at zmq.io.net.tcp.TcpConnecter.connectEvent(TcpConnecter.java:149)
        at zmq.io.IOObject.connectEvent(IOObject.java:99)
        at zmq.poll.Poller.run(Poller.java:267)
        at java.lang.Thread.run(Thread.java:818)

The stack references these lines in StreamEngine.java:

    private final Function<Msg, Boolean> processIdentity = this::processIdentityMsg;
    private final Supplier<Msg>          nextIdentity    = this::identityMsg;

Its not clear to me why this is throwing the error…