[Factor-builds] mason on macosx-x86-64: build loop error

[<fac...@gm...>]

Fatal error on macmini.local

Unix system call failed:

Operation timed out (60)
(U) [ set-namestack init-catchstack self quot>> call => stop ]
(O) build-loop
(O) update-sources
(O) latest-boot-image
(O) maybe-download-image
(O) need-new-image?
(O) download-checksum
(O) download-checksums
(O) http-request
(O) http-request*
(O) ( gensym )
(O) <request-socket>
(O) <client>
(O) M\ array (client)
(O) M\ object (client)
(O) M\ object establish-connection
(O) (throw-errno)
(O) libc-error
(O) M\ object throw
(U) [
        OBJ-CURRENT-THREAD special-object error-thread set-global
        current-continuation => error-continuation set-global
        [ original-error set-global ] [ rethrow ] bi
    ]