I've been messing around with building a live image and notice that it
looks like there are a lot of different mirrors getting called into
play. I was expecting the same mirrors to be used each time so I could
populate my local cache on the first try and then use that cache on
subsequent builds. Is there any efficient way to cache everything I
access on the first try? I'm using squid3 right now but should I be
using apt-cacher or apt-cacher-ng instead?

regards,
Lars