Passing environment variables when using genie c

If you have attempted this, you will note that the following code doesn't work:

wsl genie -c 'XYZ=abc env'

This is because genie -c invokes the command directly, not using an intermediate shell. (As you can see by running wsl genie -c ps - you should see the runinwsl helper, ps itself, and maybe a system process like (sd-pam), but no shell.

Setting an environment variable on the command like that is a shell function, which is why it doesn't work. To make it work, you need to explicitly run the command inside a shell, thus:

wsl genie -c sh -c 'XYZ=abc env'

NOTE: This is not necessary when using the RunInGenie helper application, because it does run the command in a shell, using the above technique.