yarn出现“There are no scenarios ; must have at least one"

#移除cmdtest
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 update
sudo apt install yarn