Required extension to built:
compiletc.tcz
SDL-dev.tcz
bash.tcz

Notes:
tar -xvf unison-2.40.63.tar.gz
edit buildall.sh
	PREFIX_DOC=$DESTDIR/usr/share/doc/powder
	PREFIX_BIN=$DESTDIR/opt/bin
  to
	PREFIX_DOC=/usr/local/share/doc/powder
	PREFIX_BIN=/usr/local/bin

buildall.sh
sudo buildall.sh --install

Additional configure options:

Add pixmap from http://repo.openpandora.org/files/pnd/powder.joseluisjazz/icon.png