in fact, I need to create the build directory before the third-party pre-requisites
in fact, I need to create the build directory before the third-party pre-requisites

OpenSmalltalk/vm,peteruhnak/pharo-vm,timfel/squeakvm,peteruhnak/pharo-vm,timfel/squeakvm,bencoman/pharo-vm,OpenSmalltalk/vm,peteruhnak/pharo-vm,bencoman/pharo-vm,peteruhnak/pharo-vm,timfel/squeakvm,OpenSmalltalk/vm,timfel/squeakvm,peteruhnak/pharo-vm,OpenSmalltalk/vm,OpenSmalltalk/vm,timfel/squeakvm,OpenSmalltalk/vm,OpenSmalltalk/vm,bencoman/pharo-vm,timfel/squeakvm,bencoman/pharo-vm,bencoman/pharo-vm,peteruhnak/pharo-vm,bencoman/pharo-vm,bencoman/pharo-vm,timfel/squeakvm,bencoman/pharo-vm,peteruhnak/pharo-vm,peteruhnak/pharo-vm,OpenSmalltalk/vm,bencoman/pharo-vm,timfel/squeakvm