Error installing ejs through npmbox

I have an offline environment, without internet access. I am installing my node.js dependencies through npmbox.

I had a problen unboxing ejs

[root@SDProv utumiki]# npmunbox ejs.npmbox

Unboxing ejs.npmbox...
  Unpacking ejs.npmbox...
  Installing ejs...
An error occurred while installing ejs.
ejs was not installed.
  Done.
  { Error: getaddrinfo EAI_AGAIN registry.npmjs.org:443
    at Object.exports._errnoException (util.js:1018:11)
    at errnoException (dns.js:33:15)
    at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:76:26)
  code: 'EAI_AGAIN',
  errno: 'EAI_AGAIN',
  syscall: 'getaddrinfo',
  hostname: 'registry.npmjs.org',
  host: 'registry.npmjs.org',
  port: 443,
  parent: 'utumiki' }

I don't understand why it is trying to connect to anywhere if I am installing it in offline mode.

EDIT: If I install it globaly by "npmunbox -g ejs", it works. But I don't want to install it globaly.

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