Part of it is housing. Part of it is also willingness to leave a large urban centre and move to a northern city in Canada that does not have the same infrastructure, the same support systems you would see in some of the more urban centres. So it's a challenge. If we were building mines in close proximity to cities, we would probably have a much easier time recruiting people.
I don't know if it's housing in particular, because there are easy ways around that, such as building temporary housing while the housing bubble catches up, but there are a number of factors that are creating this challenge.