[Discourse.ros.org] [Next Generation ROS] ROS2 on Gentoo
Great! Glad it was pretty straight forward!
Out of curiosity, what `ros2.repos` file are you using ? The tutorials repository is commented on the ros2.repos files since release-beta1. I would have expected this repository not to show up in the resulting `repositories` variable.
After that, everything should build just fine (you might need to change the python 3 version in the above line, depending on what python you have installed, and you might also need to change the rosdistro you have if you want the ros1 bridge).