You need to specify one of the following as an environment variable:

To specify one of the following as an environment variable, you can use the `export` command in a Unix-like operating system or the `set` command in Windows. Here is an example:

For Unix-like systems:

export VARIABLE_NAME=value

For Windows:

set VARIABLE_NAME=value

Replace `VARIABLE_NAME` with the name of the environment variable you want to set, and `value` with the desired value.