So I'm following the instructions at https://glasgow-embedded.org/latest/install.html but I get this strange error:

it's, uh, definitely a local path

```
$ pipx install -e 'glasgow/software[builtin-toolchain]'
⚠️  Ignoring --editable install option. pipx disallows it for anything but a local path, to avoid having to create a
    new src/ directory.
```