Always executing a command in local user space

When I execute the command ``` (shell-command-to-string "whoami") ``` in a local buffer, I get the local user name as expected. However, when I execute the same command on a tramp buffer (for example editing a root file with `sudo-edit`), I get the `root` username. How can I ensure that my command is always executed on the local user space regardless on the current buffer?

Commands run in the context of `default-directory`, which is good: you can do things like run compilation on remote hosts. If you want something to execute in a different location, you can let-bind `default-directory` around the expression, so it points at `~/` or some other path on your local machine.

Yep, this works!