These may work their way into wajig.

You can use the apt-get-download-only option of apt-get to download the files for an install without actually unpacking and setting up the packages. For example:

# wajig update # apt-get --download-only dist-upgrade

In this way you are able to leave the download unattended and when you are ready you can monitor the unpacking and setup.

If things go wrong somewhere the apt may be able to help. The apt-get-fix-broken will do its best:

# apt-get --fix-broken dist-upgrade

but if things still don't work, you may need to use dpkg directly to remove and isntall packages.