Build Error: MythTV on F-15

Ok, now I'm totally stumped. I figured out what the build error is but not the root cause. The mythweather plugin requires perl-DateTime-Format-ISO8602 or something like that. I've verified it is getting installed in root.log but for some reason configure does not find it and disables the mythweather plugin. I tried creating a F15 mock chroot and installed the perl module and was able to load it which is all configure tries to do... Now what? RIchard