README.org: Add free space to installation image.

Discussed at https://gitlab.com/nonguix/nonguix/-/issues/91.

* README.org (** Installation image): Add `--image-size=7.2GiB` and an
explanation why.

Signed-off-by: Jonathan Brielmaier <jonathan.brielmaier@web.de>
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Pinka pallini 2021-02-20 17:29:37 +00:00 committed by Jonathan Brielmaier
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@ -98,9 +98,16 @@ For some hardware the official Guix installation image won't do
nonfree Linux kernel and nonfree firmware with the following command:
#+begin_src sh
guix system disk-image /path/to/this/channel/nongnu/system/install.scm
guix system image --image-size=7.2GiB /path/to/this/channel/nongnu/system/install.scm
#+end_src
As indicated bellow, you will need to run ~guix pull~ to download the
Nonguix package descriptions. Some free space on your USB thumbdrive is
required for this operation to succeed. The ~--image-size~ option allows
you to specify the size of the image and, as such, to allocate free space
to it. The given value is purely indicative. It obviously depends on your
thumbdrive capacity.
Then you can write the generated disk image to a USB thumbdrive with:
#+BEGIN_SRC sh