[arisudesu]

I am not familiar with zsh, but is it really interpreted by zsh? Because the script has #!/usr/bin/env bash in its shebang, isn't it executed by bash on your system, even if launched from zsh?

[bananskalhalk]

It seems to be very source-able in both bash and zsh. If you just executed it, it will run in bash.

They seem to have gone through some effort for this to be true.