I have a need for a Tomcat appliance; first thing I tried was TurnKey. Unfortunately, turnkey-apache-tomcat is way outdated, running tomcat6.

Trying to upgrade it to at least tomcat7 results in:

root@tomcat ~# apt-get install tomcat7
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:                                                                                                              
 tomcat7 : Depends: tomcat7-common (>= 7.0.28-4+deb7u1) but it is not going to be installed                                                                  
E: Unable to correct problems, you have held broken packages.      

Any chance of something newer in the pipeline? Or at least upgrade instructions?