clone the master branch of git@github.com:pharo-project/pharo.git��and inside this clone do:
export PHARO_VERSION=60
export BOOTSTRAP_ARCH=32��
./pharo Pharo.image --no-default-preferences ./bootstrap/scripts/
prepare_image.st --save --quit
./pharo Pharo.image --no-default-preferences ./bootstrap/scripts/
bootstrap.st --ARCH=${BOOTSTRAP_ARCH} --quit
bash ./bootstrap/scripts/build.sh