Despite Harmattan using dpkg, it's not an official Debian release, or based on one.

The packages in the Debian repo are linked to Debian Squeeze/Wheezy/etc libraries, not Harmattan ones.

Instead, just go and run Easy Debian - it's an actual Debian root filesystem, and chroot into that and Xephyr it onto the screen if you want graphical apps.

If you still insist on running Debian repo packages straight onto Harmattan, I've got a costanza face coming.