wget -c https://github.com/P-H-C/phc-winner-argon2/archive/20161029/phc-winner-argon2-20161029.tar.gz
tar -xzf phc-winner-argon2-20161029.tar.gz
cd phc-winner-argon2-20161029
make # Doesn't mind -j#
make install
install -D libargon2.pc /usr/lib/pkgconfig/libargon2.pc