Unable to locate package libsfml-audio1.5

edit

When "rosmake impromptu_buttons --rosdep-install", error msg:

[ rosmake ] Expanded args ['impromptu_buttons'] to:
['impromptu_buttons']                        
[ rosmake ] Generating Install Script using rosdep then executing. This may take a minute, you will be prompted for permissions. . .
rosdep executing this script:
{{{
set -o errexit
#Packages
sudo apt-get install libsfml-audio1.5
}}}
Reading package lists... Done
Building dependency tree       
Reading state information... Done
[ rosmake ] rosdep install failed: rosdep script failed with stderr 
{{{
E: Unable to locate package libsfml-audio1.5
E: Couldn't find any package by regex 'libsfml-audio1.5'

}}}

Looks like libsfml no longer supports Ubuntu10.10...... anyone run into this problem?