cd .vim/bundle/coc.nvim/bin
sudo apt remove cmdtest 
sudo apt remove yarn
curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
sudo apt-get update -y
sudo apt-get install yarn -y
yarn install
yarn build