This is due to the underlying shell system changing with OTP 26 which is incompatible with how mix nerves.system.shell was previously working. See Adjust `mix nerves.system.shell` for OTP 26 by jjcarstens 路 Pull Request #897 路 nerves-project/nerves 路 GitHub for more details.
A new release is being created to help handle this. We鈥檝e investigated multiple ways to config the env and pass on the shell like before, but they have all been dead ends 
In the meantime, the task will still configure the environment and print out a command that can be run manually in your local shell to have the same effect
