I withdrew RRSP (HBP) in 2015 to put a down payment on a new build. I don't gain possession until 2017, do I claim the purchase in the year I bought t or when I close?

Both my husband and I withdrew our RRSP in June 2016 through the HBP (1st time home buyers) to put a down payment on a newly built home. The house is not expected to finished until March 2017. 

Now because we have to claim our T4RSP on the 2015 tax year do we also claim the purchase of our home even though we have not closed? for the First time home buyers credit? 

In my eyes, I feel the T4RSP should align with the purchase of the home. Is that correct?