There is only one principal cause for nail pops - wet timber framing. Problems arise after several months of dry warm weather which causes drying of the timber which in turn causes srinkage. As the timber srinks it exposes more of the nail shank effectivly making the nail longer. this causes the nail head to push through the drywall breaking the plaster.
It is generally accepted that the moisture level of the timber studs should be 15% or less to avoid this problem and any competent builder should know this. It is well specified in most building codes.
I suggest you have a word with your builder as repears can be quite expensive.