Using the current nRF connect v3.6.1 Getting Started Assistant I've managed to get everything installed to the point of using west to install the complete nRF Connect SDK tree but the next step is setting the SDK for a tagged release.
When I usethe direction from Getting Started Assistant
git cd ~/nrf/ncs
git checkout v1.4.2
fatal: not a git repository (or any of the parent directories): .git
of course it is not a git, west built it?
There needs to be documentation on setting the PATH after installing cmake and west and the DTC directions no longer work, Ubuntu has lost it, I found it at another location
sudo apt install ./device-tree-compiler_1.4.7-1_amd64.deb