Like hardburn said, the shebang line is interpreted by the system, not Perl. So, if you want to make sure all your systems have the right path set, I would suggest that you have a simple installation script that you run whenever you upload code. Recurse through your root code directory and replace any perl shebangs you find with the right one.

use strict;                                # duh.
use File::Find;
find ( sub {
   open IN, "< $_" || return;              # silently discard failed o
+pen
   chomp(my $firstline = <IN>);            # read in first line and
   $firstline =~ /^#!.*perl[\s\Z]/ && do { # check for a shebang
      $firstline = "#!$^X$'";              # replace with your own she
+bang
      chomp(my @nextlines = <IN>);
      open OUT, "> $_" && do {             # print the file back out
         map {print OUT $_,$/;} $firstline, @nextlines;
         close OUT;
      }
      # the next bit is a little more concise, but won't replace newli
+nes
      #$firstline = "#!$^X$'$/";
      #my @nextlines = <IN>;
      #open OUT, "> $_" && do {             
      #   map {print OUT} $firstline, @nextlines;
      #   close OUT;
      #}
   close IN;
   }, qw|
         /source/code/directory
         /another/source/dir
        |;
)
[download]

If you call this as perl thisscript.pl the special variable $^X will insert the name of your perl executable as 'perl', so run it using /var/binaries/coolest/perl thisscript.pl or wherever your executable happens to be.

Note: This was written off-the-cuff, and thoroughly untested. Use this only as a guideline and test it thoroughly before actually using it on any production code. Seriously.

Update: you probably want to write a little shell script on each system, something to the effect of

#!/bin/bash
/var/binaries/coolest/perl /usr/local/bin/thisscript.pl
[download]

That'll simplify your life a little.

Update: as I was cleaning the code a little I realized that this might actually have the happy effect of replacing the newlines in your perl files with your system's $/. I may be wrong, tho.

LAI

__END__