# Pastebin QfJiUPZ6
You must build pylibfdt:
cd somewhere
sudo apt-get install flex bison swig
git clone git://git.kernel.org/pub/scm/utils/dtc/dtc.git
cd dtc
make
make install PREFIX=~/.local         # You can install this where it suits
cd ~/.local/bin
ln -s ~/chromiumos/src/third_party/u-boot/files/tools/binman/binman

As above, ensure that ~/.local/bin in on your PATH