buildadmin@build:~$ sudo apt-get -f install apache2
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following extra packages will be installed:
  apache2-mpm-worker apache2-utils apache2.2-common
Suggested packages:
  apache2-suexec apache2-suexec-custom
The following packages will be REMOVED:
  puppetmaster-passenger
The following NEW packages will be installed:
  apache2 apache2-mpm-worker apache2-utils apache2.2-common
0 upgraded, 4 newly installed, 1 to remove and 135 not upgraded.
1 not fully installed or removed.
Need to get 0 B/323 kB of archives.
After this operation, 912 kB of additional disk space will be used.
Do you want to continue [Y/n]? y
(Reading database ... 132860 files and directories currently installed.)
Removing puppetmaster-passenger ...
/var/lib/dpkg/info/puppetmaster-passenger.postrm: 14: /var/lib/dpkg/info/puppetmaster-passenger.postrm: a2dissite: not found
dpkg: error processing puppetmaster-passenger (--remove):
 subprocess installed post-removal script returned error exit status 127
Errors were encountered while processing:
 puppetmaster-passenger
E: Sub-process /usr/bin/dpkg returned an error code (1)