Hi,
There are several ways to do this but the cleanest way would be the following.
You can open a terminal and create a directory besides the sensors
directory, for example, you can use the following command:
mkdir -p riot/basics/evaluation_1
Still using commands from the same terminal, just add empty Makefile and main.c files:
touch riot/basics/evaluation_1/{Makefile,main.c}
Then open the Makefile and main.c in new tabs in jupyterlab and paste there the evaluation content.
You can then build/flash/term from the terminal using:
make IOTLAB_NODE=auto-ssh -C riot/basics/evaluation_1 flash term
Let us know if something is unclear !