Something that got pushed recently has broken the tools. To keep the debug simple, I went back and tried to just build an old stable platform, the n450.  Below is the error:

NOTE: Unpacking home/jim/yocto-downloads/gnu-config-yocto-20111111.tgz to /build/baryon-denzil/tmp/work/x86_64-linux/gnu-config-native-20111111-r1/
tar (child): home/jim/yocto-downloads/gnu-config-yocto-20111111.tgz: Cannot open: No such file or directory
tar (child): Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error is not recoverable: exiting now
ERROR: Function failed: Unpack failure for URL: 'http://downloads.yoctoproject.org/releases/gnu-config/gnu-config-yocto-20111111.tgz'. Unpack command PATH="/build/baryon-denzil/tmp/sysroots/x86_64-linux/usr/bin/core2-linux:/build/baryon-denzil/tmp/sysroots/x86_64-linux/usr/bin:/build/baryon-denzil/tmp/sysroots/x86_64-linux/usr/sbin:/build/baryon-denzil/tmp/sysroots/x86_64-linux/usr/bin:/build/baryon-denzil/tmp/sysroots/x86_64-linux/sbin:/build/baryon-denzil/tmp/sysroots/x86_64-linux//bin:/home/jim/poky/scripts/native-intercept:/home/jim/poky/bitbake/bin/:/home/jim/poky/scripts:/home/jim/poky/bitbake/bin/:/home/jim/poky/scripts:/home/jim/poky/bitbake/bin/:/home/jim/poky/scripts:/home/jim/poky/bitbake/bin/:/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/home/jim/poky/scripts" tar xz --no-same-owner -f home/jim/yocto-downloads/gnu-config-yocto-20111111.tgz failed with return value 2