don't break if package not installed
don't break if package not installed

sathieu/stdeb,pombredanne/stdeb,sathieu/stdeb,LeMeteore/stdeb,LeMeteore/stdeb,benthomasson/stdeb,LeMeteore/stdeb,pombredanne/stdeb,benthomasson/stdeb,pombredanne/stdeb,astraw/stdeb,sathieu/stdeb,astraw/stdeb,astraw/stdeb,benthomasson/stdeb