It seems this is necessary in Flatpaks now. I have a build that failed with:
```
flatpak run --command=flatpak-builder-lint org.flatpak.Builder --exceptions repo repo
in dir /srv/buildbot/worker/build-x86_64-1/build (timeout 1200 secs)
watching logfiles {}
argv: b'flatpak run --command=flatpak-builder-lint org.flatpak.Builder --exceptions repo repo'
using PTY: False
{
"errors": [
"appstream-missing-developer-name"
],
"warnings": [
"appstream-summary-too-long",
"appstream-screenshot-missing-caption"
]
}
Please consult the documentation at https://docs.flathub.org/docs/for-app-authors/linter
program finished with exit code 1
elapsedTime=54.274905
```
... interestingly, that is marked as "warning" in the above
documentation:
https://docs.flathub.org/docs/for-app-authors/linter/#appstream-missing-developer-name
... but is reported as an error now. Even worse, the tag is
deprecated:
https://www.freedesktop.org/software/appstream/docs/chap-Metadata.html#tag-developer_name
I tried to fix it by vendoring this fixed version in the flatpak,
we'll see how that goes:
https://github.com/flathub/io.github.dweymouth.supersonic/pull/62#issuecomment-1916007362