root@mail:~# sudo apt-get install airtime
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  php-apc
Suggested packages:
  airtime-audio-samples alsa-utils
The following NEW packages will be installed:
  airtime php-apc
0 upgraded, 2 newly installed, 0 to remove and 24 not upgraded.
Need to get 9434kB of archives.
After this operation, 37.7MB of additional disk space will be used.
Do you want to continue [Y/n]? y
Get:1 ftp://ftp.hosteurope.de/mirror/archive.ubuntu.com/ lucid/universe php-apc 3.1.3p1-2 [82.0kB]
Get:2 http://apt.sourcefabric.org/ lucid/main airtime 2.3.1-1 [9352kB]
Fetched 9434kB in 0s (13.4MB/s)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
    LANGUAGE = (unset),
    LC_ALL = (unset),
    LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
Preconfiguring packages ...
Selecting previously deselected package airtime.
(Reading database ... 96249 files and directories currently installed.)
Unpacking airtime (from .../airtime_2.3.1-1_all.deb) ...
Selecting previously deselected package php-apc.
Unpacking php-apc (from .../php-apc_3.1.3p1-2_amd64.deb) ...
Processing triggers for libapache2-mod-php5 ...
 * Reloading web server config apache2                                                                                                  [Fri Mar 29 18:32:09 2013] [warn] NameVirtualHost *:80 has no VirtualHosts
                                                                                                                                 [ OK ]
Setting up airtime (2.3.1-1) ...
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
    LANGUAGE = (unset),
    LC_ALL = (unset),
    LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
Setting up apache2...
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
    LANGUAGE = (unset),
    LC_ALL = (unset),
    LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Site airtime-vhost already disabled
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
    LANGUAGE = (unset),
    LC_ALL = (unset),
    LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Enabling site airtime-vhost.
Run '/etc/init.d/apache2 reload' to activate new configuration!
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
    LANGUAGE = (unset),
    LC_ALL = (unset),
    LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Module rewrite already enabled
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
    LANGUAGE = (unset),
    LC_ALL = (unset),
    LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Site default already disabled
Configuring php5...
 * Restarting web server apache2                                                                                                         ... waiting                                                                                                                     [ OK ]
Setting up monit configuration...
Stopping daemon monitor: monit.
Starting daemon monitor: monit.
Creating symlink for Liquidsoap...
* Making sure /etc/default/locale is set properly
 * Fail

A non UTF-8 default locale found in /etc/default/locale. Airtime requires
a UTF-8 locale to run. To fix this please do the following:

Ubuntu:
Put line 'en_US.UTF-8 UTF-8' (or similar) without quotes to '/var/lib/locales/supported.d/local',
replacing any existing lines.
A list of supported locales is available in '/usr/share/i18n/SUPPORTED'
Then run 'sudo dpkg-reconfigure locales'

Debian:
Run 'sudo dpkg-reconfigure locales' and use the interface to select 'en_US.UTF-8 UTF-8' (or similar).
On the second page select this new locale as the default.

After these changes have been made simply run install again.

Now exiting install...

dpkg: error processing airtime (--configure):
 subprocess installed post-installation script returned error exit status 1
Setting up php-apc (3.1.3p1-2) ...
Errors were encountered while processing:
 airtime
E: Sub-process /usr/bin/dpkg returned an error code (1)
root@mail:~#