How to override 9999-custom.conf
================================

This file 9999-custom.conf is installed by pipewire-bin. In order to modify
this file, a user has to divert it, otherwise user's changes will be overwritten
during the next update of pipewire-bin.

# To add the diversion
sudo dpkg-divert \
       --divert /usr/share/alsa-card-profile/mixer/profile-sets/9999-custom.conf.BAK \
       --rename /usr/share/alsa-card-profile/mixer/profile-sets/9999-custom.conf

This tells to dpkg not to install 9999-custom.conf but 9999-custom.conf.BAK,
allowing the user to customize its own 9999-custom.conf.

# To remove the diversion
sudo dpkg-divert \
       --rename --remove /usr/share/alsa-card-profile/mixer/profile-sets/9999-custom.conf

Please refer to the dpkg-divert documentation for more information.