New comment by lugubris on void-packages repository

https://github.com/void-linux/void-packages/pull/14247#issuecomment-528882045

Comment:
> => ERROR: materia-gtk-theme-20190831_1: cannot access wrksrc directory [/builddir/materia-gtk-theme]

Why is the build failing?
adding:
```
mkdir ${wrksrc}
```
doesn't help