#!/usr/bin/perl
use strict;
use warnings;

my $pack = 'test.txt';     #fine when using these vars....
my $sanity_code = "blah";
my $tests = "asdfasdf";


   open(PACK,">$pack") or die("failed to open file $pack");
   print PACK <<_M_E; 
#!/usr/intel/bin/tcsh -f
$sanity_code
$tests
_M_E

   close(PACK) or die("failed to close file $pack");