run.js problem: TypeError: pouchdb.listen is not a function, any tips?

[pennsong]

Penns-MacBook-Pro:sync-gateway-tests penn$ node perf/run.js

cleanup

http server started on: http://127.0.0.1:8189

create internal stores

/Users/penn/Desktop/sync-gateway-tests/tmp/pdb-8190
/Users/penn/Desktop/sync-gateway-tests/lib/pouch.js:16
client = pouchdb.listen(port)
^

TypeError: pouchdb.listen is not a function
at Object. (/Users/penn/Desktop/sync-gateway-tests/lib/pouch.js:16:18)
at Module._compile (module.js:435:26)
at Object.Module._extensions..js (module.js:442:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:311:12)
at Function.Module.runMain (module.js:467:10)
at startup (node.js:136:18)
at node.js:963:3