I’m getting this warning from Gentoo Quality Assurance when unpacking and installing .deb archive:
*
* This package seems to install metainfo files into the following
* location(s):
*
* /usr/share/appdata
*
* This location is deprecated, it should not be used anymore by new software.
* Appdata/Metainfo files should be installed into /usr/share/metainfo directory.
* For more details, please see the freedesktop Upstream Metadata guidelines at
* https://www.freedesktop.org/software/appstream/docs/chap-Metadata.html
*
Could you update this?