On all Maemo/MeeGo retail systems (i.e. not emulators, Scratchbox etc.) BusyBox replaces all core packages, to have more space. And BusyBox conflicts with their full versions.

One solution is to compile the needed things manually. They can go to /usr/local or even to custom directory (I use /opt/wunderw in my N9 packages). Then edit PATH in profile file, so your new directory is first.