Hi, I am attempting to install ROS from debian packages and came across the following error when going through the instructions after adding the repo to my device. I am on a raspberry pi 3 b+ running lubuntu 18.04.

I can work on installing from source, but I was hoping that the repository would work following the instructions on https://index.ros.org/doc/ros2/Linux-Install-Debians/

ubuntu@ubuntu:~$ sudo apt update Hit:1 http://repo.ros2.org/ubuntu/main bionic InRelease ...

ubuntu@ubuntu:~$ sudo apt install ros-$ROS_DISTRO-desktop ... E: Unable to locate package ros-bouncy-desktop