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-rw-r--r--doc/contributing.texi11
1 files changed, 10 insertions, 1 deletions
diff --git a/doc/contributing.texi b/doc/contributing.texi
index 68d8e7e2fb..7417f28d14 100644
--- a/doc/contributing.texi
+++ b/doc/contributing.texi
@@ -112,7 +112,8 @@ 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
+top build tree of Guix; it is generated by @command{./configure}),
+as in@footnote{The @option{-E} flag to
 @command{sudo} guarantees that @code{GUILE_LOAD_PATH} is correctly set
 such that @command{guix-daemon} and the tools it uses can find the Guile
 modules they need.}:
@@ -468,6 +469,14 @@ Please follow our code formatting rules, possibly running the
 @command{etc/indent-code.el} script to do that automatically for you
 (@pxref{Formatting Code}).
 
+@item
+When possible, use mirrors in the source URL (@pxref{Invoking guix download}).
+Use reliable URLs, not generated ones.  For instance, GitHub archives are not
+necessarily identical from one generation to the next, so in this case it's
+often better to clone the repository.  Don't use the @command{name} field in
+the URL: it is not very useful and if the name changes, the URL will probably
+be wrong.
+
 @end enumerate
 
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