Closed issue by flupe on void-packages repository

https://github.com/void-linux/void-packages/issues/33728

Description:
### System

* xuname:  Void 5.13.19_1 x86_64 GenuineIntel uptodate rFFFFFFF
* package:  qemu

### Expected behavior

Disabling all options at build should work fine.

### Actual behavior

There is [a typo in the template file](https://github.com/void-linux/void-packages/blob/master/srcpkgs/qemu/template#L72), which fails to build when the `jack` option is disabled.

### Steps to reproduce the behavior

```
./xbps-src -o ~jack pkg qemu
```
---------

A lot of options are still missing, like the ability to not depend on `pulseaudio`, `bluetooth`, `X11` and the likes. More generally, I think it would be beneficial to have a `qemu-headless` version will all options disabled. I would be willing to work on a PR if need be.