Beeing in the folder where you have donwnloaded v8 build the VM (This time we gonna build a stripped version of the releases. see V8 forum topic about the size of the building)
ej:
make x64.release i18nsupport=off
make ia32.release i18nsupport=off
If you want to build for all the architectures in all the versions (debug o release) execute:
make all i18nsupport=off
Use the executable "s8vm.exe" stored in (deppending in the architecture selected and the mode), ej: