Typo's make life more interesting... yes indeed it's 5.20.2. I'm locked into that at the moment because of a very very large confederated perl legacy application that uses / is verified on that version. I'm using perlbrew to overlay the vendor perl. I've verified my paths and libs are correct. I also reverted back to vendor perl and still have the same issue. I'm about to launch a fresh CentOS 7 and try to install the module there to see if there is something about perlbrew that could be causing the issue. I don't have high hopes for that... but we'll see.