Sometimes I need to use modules which placed in the same directory where the script is. I can't write use lib qw(./lib); because the script can be called from any current working directory.

Now I write: 

use vars qw($lib);
BEGIN {$lib = $0; $lib =~ s/[^\/\\]+$//}
use lib $lib . 'lib';

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Can it be done better?

UPDATE: Thanks to Aristotle for the nice snippet 

use File::Spec::Functions qw( rel2abs catdir );
use File::Basename;
use lib catdir( dirname( rel2abs $0 ), 'lib' );

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In reply to use lib qw(relative path) by ccn

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