bug#27386: offloading documentation and env

[Oleg Pykhalov]

Oleg Pykhalov <address@hidden> writes:

> I'm trying to setup offloading too.  Just for the report I had an issue
> after setting up `%load-path` for guile with `.bashrc` snippet.  It
> seems that also required call `guix build` with `--substitute-urls=HOST`
> because without it I get `acquired build slot` loop like in
> https://lists.gnu.org/archive/html/guix-devel/2015-05/msg00035.html

Actually not always works.  Still have an issue with loop.  Client waits
for `/var/guix/offload/magnolia.local/0` but `/var/guix/offload` is
missing on build machine.