Comment 14 for bug 140739

Here's the process I followed. First I checked for the builds to complete for apt and dpkg. I found that upgrading dpkg alone allowed update-manager to run successfully:

https://launchpad.net/ubuntu/+source/dpkg/1.14.5ubuntu14

If it has been built successfully follow the link for the appropriate architecture (in my case amd64).

In the left sidebar (the "Resulting binaries" portlet) follow the link to each available binary package in turn.

For each binary package, download the .deb listed under "File download"

You can also use a terminal and wget to do this, e.g. (for amd64) copy the link to the deb file and paste it as an argument to wget:

$ wget http://launchpadlibrarian.net/9354821/dpkg_1.14.5ubuntu14_amd64.deb
$ wget http://launchpadlibrarian.net/9354822/dselect_1.14.5ubuntu14_amd64.deb

Once downloaded, install:

$ sudo dpkg -i dselect_1.14.5ubuntu14_amd64.deb
$ dpkg -i dpkg_1.14.5ubuntu14_amd64.deb