The file build_files/build_environment/install_deps.sh contains the following line:

THREADS=`cat /proc/cpuinfo | grep processor | wc -l`

The command within the backticks is a Useless Use Of Cat.

A more compact way of writing the same thing (saving two subprocesses) is

THREADS=`grep -c processor /proc/cpuinfo`

or (using POSIX-preferred command-substitution parentheses instead of backticks)

THREADS=$(grep -c processor /proc/cpuinfo)

But the most compact, and least Linux-specific, way is to use the nproc(1) command from the GNU coreutils package:

THREADS=$(nproc)