error when building newly initialized addon

After I had troubles building/serving an addon I'm working at, I did the usual steps to heal (delete note_modules, npm clean, npm install, ...) with no success.
So finally I'm at the stage where I newly created a fresh addon via ember addon jeff-table to port the 'old' not working repo to there....
Addon-creation was successful:

installing addon
create .bowerrc
....
create .npmignore
Successfully initialized git.
Installed packages for tooling via npm.
Installed browser packages via Bower.

Anyway, again I get the same errors when trying to build the untouched addon:

Cannot read property '0' of undefined
TypeError: Cannot read property '0' of undefined
at EmberAddon.EmberApp._initVendorFiles (C:\users\jefff\google drive\www\ember-addons\jeff-table\node_modules\ember-cli\lib\broccoli\ember-app.js:317:55)
at EmberAddon.EmberApp [as appConstructor] (C:\users\jefff\google drive\www\ember-addons\jeff-table\node_modules\ember-cli\lib\broccoli\ember-app.js:94:8)
at new EmberAddon (C:\users\jefff\google drive\www\ember-addons\jeff-table\node_modules\ember-cli\lib\broccoli\ember-addon.js:38:8)
at module.exports (C:\users\jefff\google drive\www\ember-addons\jeff-table\ember-cli-build.js:6:13)
at Class.module.exports.Task.extend.setupBroccoliBuilder (C:\users\jefff\google drive\www\ember-addons\jeff-table\node_modules\ember-cli\lib\models\builder.js:55: 19)
at Class.module.exports.Task.extend.init (C:\users\jefff\google drive\www\ember-addons\jeff-table\node_modules\ember-cli\lib\models\builder.js:89:10)
at new Class (C:\users\jefff\google drive\www\ember-addons\jeff-table\node_modules\ember-cli\node_modules\core-object\core-object.js:18:12) at Class.module.exports.Task.extend.run (C:\users\jefff\google drive\www\ember-addons\jeff-table\node_modules\ember-cli\lib\tasks\serve.js:15:19)
at C:\users\jefff\google drive\www\ember-addons\jeff-table\node_modules\ember-cli\lib\commands\serve.js:64:24

I suspected GDrive to have messed up my node_modules or smth, but on a fresh installation this could not be the case (with GDrive switched of).
I have not touched installation of ember-cli (not that I know of).

Does anybody have an idea of what could be wrong here?

ember-cli: 2.5.0 node: 4.2.2 os: win32 x64