Hi,

The manual says ((guix) Invoking guix system) that the options to 'guix
system' "can contain any of the common build options".  Although some
common build options (e.g. '--fallback') do seem to work, I have noticed
that the '--root' option does not.  Consider the following:

--8<---------------cut here---------------start------------->8---
[0] marusich@garuda:/tmp
$ GUIX_BUILD_OPTIONS=--root=foo guix system disk-image --image-size=1G ~/guix/gnu/system/install.scm
guix system: error: root=foo: unrecognized option
[1] marusich@garuda:/tmp
$ guix system disk-image --root=foo --image-size=1G ~/guix/gnu/system/install.scm
guix system: error: root=foo: unrecognized option
[1] marusich@garuda:/tmp
$ guix system disk-image -r foo --image-size=1G ~/guix/gnu/system/install.scm
guix system: error: r: unrecognized option
[1] marusich@garuda:/tmp
$ 
--8<---------------cut here---------------end--------------->8---

I expected the 'guix system' command to run normally and produce an
indirect GC root at path /tmp/foo.  Instead, the command failed.  The
'--root' option does work with 'guix build'.  Is the documentation
incorrect, or is this a bug?

-- 
Chris