Yarn ERROR: There are no scenarios; must have at least one

Question

I tried to install Yarn and when I used the yarn command I got:

00h00m00s 0/0: : ERROR: There are no scenarios; must have at least one.

Answer 1

sudo npm install -g yarn

then open a new terminal window and type "yarn --version"

Answer 2

It looks like that I was trying to execute the wrong yarn, because simply running sudo apt install yarn on my Ubuntu 18.04 gave me yarn from cmdtest.

So I solved by uninstalling it:

sudo apt remove yarn

And by installing it as the official website explains, which in my case (Ubuntu 18.04) it was the following:

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

Answer 3

You've got the wrong yarn. The yarn you're executing comes from the cmdtest package. Uninstalling cmdtest first should fix this:

sudo apt remove cmdtest

Once you've uninstalled it, run the commands below to install yarn properly:

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

Answer 4

I began to receive this error when i upgrade my nodejs to a new version. The steps i did to fix that bugs are :

1. sudo apt remove cmdtest
2. sudo apt autoremove
3. sudo npm install -g yarn

Answer 5

sudo apt install --no-install-recommends yarn

Answer 6

The real name you should use when installing is yarnpkg

sudo apt install yarnpkg

That is the solution.