I cloned the project to my tmp folder and updated npm
created stratum.js as in your example
when starting
$ node stratum.js
module.js:340
throw err;
^
Error: Cannot find module 'x11-hash'
at Function.Module._resolveFilename (module.js:338:15)
at Function.Module._load (module.js:280:25)
at Module.require (module.js:364:17)
at require (module.js:380:17)
at Object. (/home/gpson/tmp/node_modules/stratum-pool/lib/jobManager.js:9:11)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Module.require (module.js:364:17)
npm -v
1.4.3
node -v
v0.10.26