PipeScript should be able to define a variable at build time

I would like to have a file named `template.ps.psm1` and within that, parse the actual value. Here's what I tried

```
$global:currentmodule = $script:module.Name
Build-PipeScript $root\build\template.ps.psm1
```

And within template, I had

```
$thismodule = '' <#{
        "'$global:currentmodule'"
    }#>
```

This only worked if I named it `template-psm.ps.psd1`