[TYPO3-mvc] Problem with translate in f:form.select option

[Sebastian Fischer]

Hi guys.

Todays exercise is, make the following work ^^

<f:form.select name="data[delivery]" options="{
	pickup: '{f:translate(key: delivery_pickup)}',
	depositing: '{f:translate(key: delivery_depositing)}',
	shipment: '{f:translate(key: delivery_shipment)}'
	}" value="pickup" />

The select gets rendered with 3 items but no labels in the items.

The translation viewhelper gets called but gets an empty key so no 
translated string gets returned.

How could this be fixed? First solving answer wins a beer on the dev days ;)

Greetings
Sebastian