Comment 4 for bug 1378245

How much effort would it be to actually build pristine images per silo that contain the packages in the silo?

Each time we have to make the images writable and add silo ppa's manually and run apt-get we effectively taint the testing results as they don't match the state that a released image would have.

Simple case: as the root is made writable we would not catch the situation where a component is actually depending on write access which would not be possible under ro root.