Working fine when solo, but can't when in pool:
14:47:29

minerd --algo yescrypt --scantime 99 --url stratum+tcp://mine.altpooler.com:3500 --userpass myuser.worker:pass --threads 2 --retries -1 -P
14:47:29

Miner started. You might not see any output for a few minutes.
14:47:29

[2014-09-14 14:47:29] Binding thread 0 to cpu 0
14:47:29

[2014-09-14 14:47:29] Binding thread 1 to cpu 1
14:47:29

[2014-09-14 14:47:29] 2 miner threads started, using 'yescrypt' algorithm.
14:47:29

[2014-09-14 14:47:29] Starting Stratum on stratum+tcp://mine.altpooler.com:3500
14:47:29

[2014-09-14 14:47:29] > {"id": 1, "method": "mining.subscribe", "params": ["cpuminer/2.4"]}
14:47:29

[2014-09-14 14:47:29] < {"id":1,"result":[[["mining.set_difficulty","deadbeefcafebabef105000000000000"],["mining.notify","deadbeefcafebabef105000000000000"]],"5ffffff5",4],"error":null}
14:47:29

Miner exited.
me too, it seems that it concern the the instruction set, may be they give some option when compiling