Sounds like something else is wrong if it’s locking up at the command line (the last line you copied). The firmware isn’t even running at that point and the compilation step already completed above.
You can answer the question with (n) to avoid the launch script setup.
Issues with random lockups tend to be related to weak power supplies, if I am not mistaken.
Also, you can also test this code on any 32/64-bit linux or OS X by using ./build.sh demo