I am trying to learn PyCharm, need to pass an environment variable as a command line parameter to my process, e.g. execute an equivalent of `myScript.py -u $myVar` on Linux, or `myScript.py -u %myVar%` on Windows.

How do I specify that in the PyCharm configuration? I don't want my script to depend on the name `myVar`, just on the content of that environment variable.