Please help about shield rinux build!

Hi guys,
i just got NVIDIA Shield TV and I installed Ubuntu 14.04.2

I tried to build SHIELD Android TV Base with
http://nv-tegra.nvidia.com/gitweb/?p=manifest/android/binary.git;a=blob_plain;f=README_SHIELD;hb=rel-22r11-partner

actually, I proceeded like this

http://imageshack.com/a/img673/8995/qK4KkV.png

but, when O type

. build/envsetup.sh

Error message is like this

http://imageshack.com/a/img661/4585/o4pZk9.jpg

How can I debug this error?