It should be no problem to link to the Flatpak package if it is ready.
Also changes to the source are possible when needed for Flatpak - when don't conflict with Hugins standard behaviour.
Some time ago there were some changes incorporated for a Hugin AppImage. see e.g. changeset http://hg.code.sf.net/p/hugin/hugin/rev/1021aae5653b (and some other later changesets)
Maybe they are helpful also for Flatpak.
It should be no problem to link to the Flatpak package if it is ready.
Also changes to the source are possible when needed for Flatpak - when don't conflict with Hugins standard behaviour.
Some time ago there were some changes incorporated for a Hugin AppImage. see e.g. changeset http:// hg.code. sf.net/ p/hugin/ hugin/rev/ 1021aae5653b (and some other later changesets)
Maybe they are helpful also for Flatpak.