All,
despite having used Perl for years, I've never had the privilege (riiiiiight) of building out my own perl build.

I'm building perl on a server in order to productionize a small tool, but it's proving tricky. Getting perl installed is easy enough. I've got it installed to the non-standard location:
/export/home/scratch/perl

The hiccups started when I needed to install DBD::Sybase. After trying (and failing) several times, the errors i was getting lead me to believe I needed to be dealing with a 64-bit version of the library. Found an rpm for it, but it requires 64-bit DBI. Again, i found an RPM.

After checking the non-prod box, I see that there are many 64-bit versions of modules installed:

>:/export/home/scratch/perl/lib/site_perl/5.16.3/x86_64-linux$ ls -l
total 468
drwxrwx---  3 dbalaban dbalaban   4096 Apr  8  2013 Apache
drwxrwx---  3 dbalaban dbalaban   4096 Apr  8  2013 Apache2
drwxrwx---  2 dbalaban dbalaban   4096 Apr  8  2013 APR
-rwxrwx---  1 dbalaban dbalaban   2239 Apr  8  2013 APR.pm
drwxr-x---  3 dbalaban dbalaban   4096 May 15 13:44 Attribute
drwxrwx--- 63 dbalaban dbalaban   4096 May 15 13:44 auto
drwxrwx---  3 dbalaban dbalaban   4096 May 21 15:51 Bit
drwxrwx---  3 dbalaban dbalaban   4096 Apr  8  2013 Bundle
drwxrwx---  3 dbalaban dbalaban   4096 Apr  5  2013 Compress
drwxr-x---  3 dbalaban dbalaban   4096 Nov 11  2013 Crypt
drwxrwx---  6 dbalaban dbalaban   4096 Jun 20  2013 DBD
drwxrwx---  8 dbalaban dbalaban   4096 Apr  5  2013 DBI
-rwxrwx---  1 dbalaban dbalaban 311516 Mar 28  2013 DBI.pm
-rwxrwx---  1 dbalaban dbalaban   1533 Jul 16  2007 dbixs_rev.pl
drwxrwx---  2 dbalaban dbalaban   4096 Apr  5  2013 Digest
drwxrwx---  2 dbalaban dbalaban   4096 Apr  5  2013 HTML
drwxrwx---  3 dbalaban dbalaban   4096 Apr  5  2013 List
drwxrwx---  2 dbalaban dbalaban   4096 Apr  8  2013 ModPerl
-rwxrwx---  1 dbalaban dbalaban   1805 Apr 25  2012 mod_perl2.pm
drwxr-x---  3 dbalaban dbalaban   4096 Nov 11  2013 Net
drwxr-x---  3 dbalaban dbalaban   4096 May 15 13:44 Package
drwxr-x---  3 dbalaban dbalaban   4096 May 15 13:44 Params
-rwxrwx---  1 dbalaban dbalaban   4234 Jan 24  2012 RRDs.pm
drwxrwx---  2 dbalaban dbalaban   4096 Apr  5  2013 Scalar
drwxr-x---  8 dbalaban dbalaban   4096 Nov 12  2013 Template
-r--r--r--  1 dbalaban dbalaban  25038 Jul 24  2013 Template.pm
drwxrwx---  2 dbalaban dbalaban   4096 Apr  5  2013 Term
-r--r--r--  1 dbalaban dbalaban  15550 Nov  5  2007 Tibrv.pm
drwxrwx---  2 dbalaban dbalaban   4096 Apr  5  2013 Win32
drwxr-x---  3 dbalaban dbalaban   4096 Nov 11  2013 XML
[download]

Is there a way to configure cpan to install 64-bit version to the architecture specific directories (..../x86_64-linux)? I can only find rpm's to do this, and it seems like manually building this out will be a bear.