> One major complication exists in that several image files in the source > tree are documented in the top-level copyright file as being subject to > the Unsplash license, a DFSG-incompatible license. In some cases it may > be possible to simply exclude these DFSG-incompatible files using a > Files-Excluded header[1][2] in the debian/copyright file.
We fixed this in the latest stable release, 0.10.14. It's too late for Trixie now (probably), but it should allow for updating the package now. The relevant debian/copyright changes were also made upstream.
-- tibetiroka