Won't load despite main being defined

[Todilo]

I am trying to load mustache.js but meteor-bower just wont load it (not found as a package when i look at source-code on page).

My Bower.json

{
  "name": "test",
  "version": "0.0.1",
  "dependencies": {
    "mustache.js": "mustache#~2.1.3"
  },
  "private": true
}

.bowerrc

{
"directory": ".meteor/local/bower"
}

the bower package is downloaded as expected but there is no script tag for it. The mustache.js library does include in its bower.json:

  "main": "mustache.js",

which should resolve the loading issue.
Any ideas?