The thing is I'm initializing $projectLocation to the invironment variable if it exists, otherwise I initialize (in my development environment), on the production environment it doesn't exist so initialize it to another location (predifined one).

Putting it all together I offer:

my $projectLocation;
BEGIN {
  $projectLocation = $ENV{DEVLOCATION} 
                  || '/default/production/location';
}
use lib $projectLocation;
[download]

-- Eric Hammond