New comment by ericonr on void-packages repository

https://github.com/void-linux/void-packages/pull/27193#issuecomment-747526479

Comment:
Ah! Got it.

I think if we can make the rules a bit more specific, it won't be necessary to specify the line numbers. I will try to build it locally to see if I can come up with one, but I think 

```
vsed -e "s_\ts_src/espeak-ng_/usr/bin/espeak-ng_" -i Makefile
```

might do the trick (plus a rule with `../s_src/espeak-ng`).

By the way, do you think we could use a symlink in `/usr/bin/espeak`?