When installing blinds, what sort of anchor should i use on drywall over cement/cinder block walls?

The title says it all really- I am installing some lightweight IKEA blinds and did not realize the drywall would have brick just behind it. I have only ever used the plastic anchors for drywall before so I don't know what to get in order to hang the blinds. I also don't have any masonry bits for my drill, so if its not obvious please help me pick out the right size bit so I can install the anchor. Thanks.