Unison development was ended, but seems to be alive and continued now on https://github.com/bcpierce00/unison Please add the installation of unison-fsmonitor required for -repeat watch mode or make it optional by USE flag.
http://www.cis.upenn.edu/~bcpierce/unison/download.html links to the {URL}.
*** This bug has been marked as a duplicate of bug 572148 ***
I see. Search for "unison-fsmonitor" did not find that bug as the quick search does not search for RESOLVED. However the patch from 2017-04-12 doesn't seem to be applied yet as of today.
I guess what we really need is to stabilize unison-2.48.3.
(In reply to Benda Xu from comment #4) > I guess what we really need is to stabilize unison-2.48.3. Sorry, stabilize unison-2.48.4.