'DS' is not defined

When trying to create a model with actual ember-cli build (1.11) I got JSHint errors saying that:

'DS' is not defined.

Following some hints I tried to install ember-data with bower, but this results in the following message:

Unable to find a suitable version for ember, please choose one:
    1) ember#~1.0.0 which resolved to 1.0.1 and is required by ember-data#0.0.14
    2) ember#1.11.1 which resolved to 1.11.1 and is required by ember-music
    3) ember#> 1.5.0-beta.3 which resolved to 1.11.3 and is required by ember-resolver#0.1.15
    4) ember#>= 1.8.1 < 2.0.0 which resolved to 1.11.3 and is required by ember-data#1.0.0-beta.16.1
    5) ember#>=1.4 <2 which resolved to 1.11.3 and is required by ember-cli-shims#0.0.3
Prefix the choice with ! to persist it to bower.json

How can I fix this ?