$ export BUILD=nacl-amd64p32-temp
$ export BUILDREV=59b1bb4bf045 
$ docker run \
     -v $HOME/keys/$BUILD.buildkey:/.gobuildkey \
     gobuilders/linux-x86-nacl \
     /usr/local/bin/builder -rev=$BUILDREV -buildroot=/ -v -cmd=/usr/local/bin/build-command.pl $BUILD