doc: Recommend building in ‘guix shell -CPW’.

This was prompted by <https://issues.guix.gnu.org/66537>, where someone
tried to build Guix within ‘guix shell --pure’ on a foreign distro and
found that ./configure would pick software from the host system.

Suggested by Hiep Pham <hiepph9@proton.me>.

* doc/contributing.texi (Building from Git): Recommend ‘guix shell -CPW’.

Change-Id: I7694b482d982917fef6ec404f68ddacea761f482
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Ludovic Courtès 2023-11-22 12:57:00 +01:00
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@ -76,15 +76,17 @@ all the dependencies and appropriate environment variables are set up to
hack on Guix:
@example
guix shell -D guix --pure
guix shell -D guix -CPW
@end example
or even, from within a Git worktree for Guix:
@example
guix shell --pure
guix shell -CPW
@end example
If @option{-C} (short for @option{--container}) is not supported on your
system, try @command{--pure} instead of @option{-CPW}.
@xref{Invoking guix shell}, for more information on that command.
If you are unable to use Guix when building Guix from a checkout, the