The libboost-dev package in the repos is an older one and I would like to use the newest release. I'm OK with installing from source, but am a little confused by the instructions on the site. It instructs to run
./b2 install --prefix=PREFIX
where PREFIX is a directory where you want Boost.Build to be installed.
What should PREFIX be set to so that the libraries and headers are available for the compilers to find without specifying custom paths?