Meteor package not loading

Question

I've added some packages to my meteor application but it seems that, from time to time, some packages wont load. In this case, crypto-sha1. This is the smart.json file:

{
  "packages": {
    "accounts-ui-bootstrap-dropdown": {},
    "underscore-string-latest": {},
    "iron-router": {},
    "iron-router-progress": {},
    "streams": {},
    "holder": {},
    "font-awesome": {},
    "collection-api": {},
    "filepicker": {},
    "fancybox": {},
    "jquery-ui": {},
    "jquery-ui-sortable": {},
    "jquery-ui-bootstrap": {},
    "moment": {},
    "fullcalendar": {},
    "bootboxjs": {},
    "crypto-base": {},
    "crypto-sha1": {},
    "crypto-md5": {},
    "dropbox": {}
  }
}

But during boot the only loaded packages are crypto-base and crypto-md5. Any clue?