Subject: [bug#74251] [PATCH] Adding jack-mixer audio package

From: Ekaitz Zarraga <[email-masked]>
Date: Mon, 11 Nov 2024 17:23:16 +0100

Sorry mate I didn't explain it properly.

The commit message has two parts: a title and a body.

The title you used before was correct, you were only missing the body. 
This is how the whole commit message should look like:

gnu: audio: Add jack-mixer

* gnu/packages/audio.scm (jack-mixer): New variable.