This enables `npm test` to successfully call scripts in `bin/` with
the `bash` binary specified by `PROFILE`.
---
Additional information:
In addition to potentially preferring an alternative version of bash
than the one in `/bin/bash`, some distributions forego storing bash in
`bin/` at all, such as `NixOS`:
```bash
$ cat /etc/os-release | rg '^NAME=' -r ''
NixOS
$ which bash
/run/current-system/sw/bin/bash
```
