Maybe the resulting script should have the following header:

# If you want your scripts to look like this, you should
use Acme::EyeDrops 2.00;
[download]

Acme::EyeDrops would then add a VERSION method (which will be automatically called by Perl at compile time) which could do something along the lines of:

sub VERSION {
  my $proto = shift;
  if (@_ and $_[0] >= 2.00 and $] >= 5.017) {
    require re;
    re->import("eval");
  }
  $proto->SUPER::VERSION(@_);
}
[download]

That is, if you need to add some code, then make it look like a badly line-wrapped comment.