So i think the parts, prime, stage directories should be placed somewhere where you can configure, and I think they should default to `~/.snapcraft/` or something like that.. I can think of multiple advantages: - You don't clutter the location of the `snapcraft.yaml` file, which can be annoying if that file is under version control - You can avoid issues where the location of the `snapcraft.yaml` is mounted using a filesystem that doesn't support all the unix capabilities that might be required during building, or avoid any security blocks that might happen because of the uid/gids of the directory - if the parts are being pulled via git/bzr, you can keep them in the same place, so that later pulls can be incremental...