wget https://ftp.gnu.org/gnu/nettle/nettle-3.5.tar.gz
tar xvfz nettle-3.5.tar.gz
cd nettle-3.5
./configure
make
sudo make install
sudo ldconfig
git clone https://gitlab.com/gnutls/gnutls.git
cd gnutls
git checkout kepcokdn
./bootstrap
./configure
make
sudo make install
make check (optional)