Always error out if the source services execution failed (the old
code only errored out if the local_service_run config option was
set (this behavior was probably unintentionally introduced in commit
d3dd8539d9 ('- fallback to "build
--local-package" if it does not exist instead of complaining'))).
Also, do not suppress all exceptions (if something failed in the
services execution code path, the user should be informed).
The bug was reported by darix.
c39c3b8cae