fonts-* upgrade issue: an example

[kartik@olive: ~/development/debian/debian-in-git/ ]% sudo apt-get install ttf-punjabi-fonts
[sudo] password for kartik:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 ttf-punjabi-fonts : Depends: fonts-guru but it is not going to be installed
E: Broken packages
zsh: exit 100   sudo apt-get install ttf-punjabi-fonts
[kartik@olive: ~/development/debian/debian-in-git/ ]% sudo apt-get install ttf-punjabi-fonts fonts-guru
Reading package lists... Done
Building dependency tree
Reading state information... Done
fonts-guru is already the newest version.
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 fonts-guru : Breaks: ttf-punjabi-fonts but 2:1.0 is to be installed
 fonts-guru-extra : Breaks: ttf-punjabi-fonts but 2:1.0 is to be installed
E: Broken packages
zsh: exit 100   sudo apt-get install ttf-punjabi-fonts fonts-guru