hem error

hem.js

#!/usr/bin/env node
var path   = require('path'),
    Module = require('module'),
    fs     = require('fs');
    
if (path.existsSync('./slug.js')) {
  return Module._load('./slug.js');
}

require('../lib/hem').exec();

hem_error_shell_output

hdm-web ➤ hem

node.js:134
        throw e; // process.nextTick error, or 'error' event on first tick
        ^
Error: Cannot find module 'hem'
    at Function._resolveFilename (module.js:317:11)
    at Function._load (module.js:262:25)
    at require (module.js:346:19)
    at Object.<anonymous> (/home/kost/workspace/hdm-web/slug.js:1:82)
    at Module._compile (module.js:402:26)
    at Object..js (module.js:408:10)
    at Module.load (module.js:334:31)
    at Function._load (module.js:293:12)
    at Object.<anonymous> (/usr/local/lib/node_modules/hem/bin/hem:7:17)
    at Module._compile (module.js:402:26)