vcs

[cpaliqaw]

The method for installing vcstool should be updated. Here's what I get when installing on Ubuntu 18

cpaliqaw@paliqaw-ubuntu-18:~$ sudo apt-get install -y python3-vcstool
[sudo] password for cpaliqaw: 
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package python3-vcstool

My solution

sudo apt update
sudo apt upgrade
sudo apt install python3-pip
sudo pip3 install -U vcstool

[RomanRobotnik]

Both alternatives can be suggested since the default one was working in the past, as far as I know.