Comment 2 for bug 612296

I tried to install it again after killing the installation process and this is what i got:

sudo aptitude install approx
Reading package lists... Done
Building dependency tree
Reading state information... Done
Reading extended state information
Initializing package states... Done
The following partially installed packages will be configured:
  approx
0 packages upgraded, 0 newly installed, 0 to remove and 38 not upgraded.
Need to get 0B of archives. After unpacking 0B will be used.
Writing extended state information... Done
debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
Setting up approx (4.1-1build1) ...
debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
dpkg: error processing approx (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 approx
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install. Trying to recover:
Setting up approx (4.1-1build1) ...
debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
dpkg: error processing approx (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 approx
Reading package lists... Done
Building dependency tree
Reading state information... Done
Reading extended state information
Initializing package states... Done