c:\test>type dealer\*.pm
dealer\x.pm
package config;
our $dealer = 'x';

dealer\y.pm
package config;
our $dealer = 'y';

dealer\z.pm
package config;
our $dealer = 'z';

c:\test>perl -E"my $p=shift; require qq[dealer/$p.pm]; say $config::dealer" x
x

c:\test>perl -E"my $p=shift; require qq[dealer/$p.pm]; say $config::dealer" y
y

c:\test>perl -E"my $p=shift; require qq[dealer/$p.pm]; say $config::dealer" z
z