heena@heena-Aspire-5750:~/kde/kdelibs/build$ sudo apt-get -f install
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Correcting dependencies... Done
The following packages were automatically installed and are no longer required:
  libxmlrpc-core-c3 qt4-demos
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
  qtchooser
Suggested packages:
  qt4-default qt5-default
The following NEW packages will be installed:
  qtchooser
0 upgraded, 1 newly installed, 0 to remove and 8 not upgraded.
2 not fully installed or removed.
Need to get 0 B/15.2 kB of archives.
After this operation, 72.7 kB of additional disk space will be used.
Do you want to continue [Y/n]? y
(Reading database ... 207787 files and directories currently installed.)
Unpacking qtchooser (from .../qtchooser_0.0.1~git20121229.g8f08405-0ubuntu1~precise1~test7_i386.deb) ...
dpkg: error processing /var/cache/apt/archives/qtchooser_0.0.1~git20121229.g8f08405-0ubuntu1~precise1~test7_i386.deb (--unpack):
 trying to overwrite '/usr/bin/qdbusviewer', which is also in package qt4-dev-tools 4:4.8.2+dfsg-2ubuntu1~precise1~ppa3
Processing triggers for man-db ...
Errors were encountered while processing:
 /var/cache/apt/archives/qtchooser_0.0.1~git20121229.g8f08405-0ubuntu1~precise1~test7_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)