doc: Mention the build environment.

* doc/contributing.texi (Running Guix Before It Is Installed): Add a
note about having the dependencies available.
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Ludovic Courtès 2018-07-04 14:36:07 +02:00
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@ -108,7 +108,9 @@ actually installing them. So that you can distinguish between your
``end-user'' hat and your ``motley'' costume.
To that end, all the command-line tools can be used even if you have not
run @code{make install}. To do that, prefix each command with
run @code{make install}. To do that, you first need to have an environment
with all the dependencies available (@pxref{Building from Git}), and then
simply prefix each command with
@command{./pre-inst-env} (the @file{pre-inst-env} script lives in the
top build tree of Guix), as in@footnote{The @option{-E} flag to
@command{sudo} guarantees that @code{GUILE_LOAD_PATH} is correctly set