[yocto] SCons Build Issue

[George Hilliard]

Hello,
I have a build issue.  I'm trying to write a Bitbake recipe for jsoncpp, which uses SConstruct.  My .bb file is at https://gist.github.com/thirtythreeforty/8725055.  When I run it, Bitbake complains,

| DEBUG: Executing shell function do_compile
| Traceback (most recent call last):
|   File "/home/user/msu-community-bsp/build_mx6/tmp/sysroots/x86_64-linux/usr/bin/scons", line 187, in <module>
|     import SCons.Script
| ImportError: No module named SCons.Script
| ERROR: scons build execution failed.
| ERROR: Function failed: do_compile (see /home/user/msu-community-bsp/build_mx6/tmp/work/armv7a-vfp-neon-poky-linux-gnueabi/jsoncpp/0.5.0-r0/temp/log.do_compile.8396 for further information)

What gives?  How can I modify the recipe (or my setup) to build this infernal package?

Thanks in advance!
George Hilliard