keep getting the same error any 1 know all the repos?

Nokia-N900-42-11:~# apt-get install nitdroid-installer
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:
nitdroid-installer: Depends: bzip2 but it is not installable
E: Broken packages

still dont have a clue were im going wrong from lol.