no destroot found (was: help please)

[Joshua Root]

> what does this mean …
> 
> [haycorn] /Users/jam/DEVEL [580]% sudo port install qt511-qtwebkit
> --->  Computing dependencies for qt511-qtwebkit
> --->  Installing qt511-qtxmlpatterns @5.11.3_0
> Error: Failed to install qt511-qtxmlpatterns: no destroot found at: /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_aqua_qt511/qt511-qtxmlpatterns/work/destroot

It's a bug. Quite a few people have encountered it, but we've never been
able to reproduce it. If you know how to reproduce it, please add that
information to <https://trac.macports.org/ticket/55445>.

The workaround is simple however: clean the affected port.

- Josh