New comment by pullmoll on void-packages repository

https://github.com/void-linux/void-packages/pull/18298#issuecomment-575659767

Comment:
The lines `depends+=" libGLES"` and `depends+=" libGL"` are run twice which makes the list of target dependencies repeat them.
I think we should put an `unset depends` somewhere in the template before adding to `depends`.