with a config like this :
```
services.tts = {
servers = {
english = {
enable = true;
port = 5300;
model = "tts_models/en/ljspeech/vits"
};
};
};
```
You the WAVs tts creates contain an error message which will be read to
you before the text you typed in will be read to you.
This patch fixes that.
Provide a module to configure Coqui TTS, available as `tts` in nixpkgs
for a few releases already.
The module supports multiple servers in parallel, so multiple languages
and testing scenarios can be covered, without affecting any production
usage.