Dear maintainer,
your package ovito currently FTBFS because it uses a deprecated name for qt6-svg-dev.
libqt6svg6-dev was renamed to qt6-svg-dev in 2022 and the old name was kept as a Provides.
Recently though, this old Provides was removed and thus your package FTBFS now.
This can be fixed easily by simply replacing
libqt6svg6-dev
with
qt6-svg-dev
in the build dependencies. There are no functional changes and your package should build as before.
Thank you for maintaining ovito.