test-keep-alive throws: Error: spawn wrk ENOENT

[mykmelez]

=== release test-keep-alive ===
Path: pummel/test-keep-alive
JS error at util.js:1036: Error: spawn wrk ENOENT

util.js:1036

Error: spawn wrk ENOENT
at exports._errnoException (util.js:1036:11)
at ChildProcess/this._handle.onexit (internal/child_process.js:193:32)
at onErrorNT (internal/child_process.js:359:3)
at _combinedTickCallback (internal/process/next_tick.js:74:11)
at _tickCallback (internal/process/next_tick.js:98:9)
at Module.runMain (module.js:596:3)
at run (bootstrap_node.js:382:7)
at startup (bootstrap_node.js:137:9)
at bootstrap_node.js:497:3
Assertion failure: !joinable(), at /Users/myk/Projects/spidernode/deps/spidershim/spidermonkey/js/src/threading/Thread.h:122
Command: out/Release/node /Users/myk/Projects/spidernode/test/pummel/test-keep-alive.js
--- CRASHED (Signal: 11) ---