INSTALLSITELIB => '/opt/bamf/lib',
INSTALLSCRIPT => '/opt/bamf/bin',
EXE_FILES => ['relative/path/to/pl1','relative/path/to/pl2]

##</code><code>##

use File::Spec;

my $lib_path = File::Spec->rel2abs($0);
$lib_path =~ s/\/bin\/[\w\d-]+\.pl/lib/;

push(@INC,$lib_path);