Kubuntu install stuck with unmet dependencies


I tried to install Kubuntu on an existing Ubuntu system using this command:

$ sudo apt install kubuntu-desktop

And I got this package dependency error:

You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 kde-telepathy-minimal : Depends: kde-config-telepathy-accounts (>= 15.04.0) but it is not going to be installed
 unity-scope-gdrive : Depends: account-plugin-google but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

However, running sudo apt-get -f install would stop with the same dependency problem.


The key here is to realize that apt itself cannot resolve this cyclic dependency. So, to fix it we need to use a lower-level tool to explicitly take out the offending package. We can do that by using dpkg:

$ sudo dpkg --purge unity-scope-gdrive
$ sudo dpkg --purge account-plugin-google
$ sudo apt-get -f install

Tried with: Ubuntu 15.10

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