liamtimms [1] filed an orphan request for mrtrix3 [2]:

package has had a bug where it is constantly flagged as having to rebuild for 2 years, no sign of activity since 2018, is using git but not marked as `-git` and doesn't reflect provide the current stable release as expected.

[1] https://aur.archlinux.org/account/liamtimms/ [2] https://aur.archlinux.org/pkgbase/mrtrix3/