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-rw-r--r--doc/contributing.texi5
1 files changed, 2 insertions, 3 deletions
diff --git a/doc/contributing.texi b/doc/contributing.texi
index 6770fae222..e00634eed4 100644
--- a/doc/contributing.texi
+++ b/doc/contributing.texi
@@ -281,8 +281,7 @@ Once your package builds correctly, please send us a patch
 (@pxref{Submitting Patches}).  Well, if you need help, we will be happy to
 help you too.  Once the patch is committed in the Guix repository, the
 new package automatically gets built on the supported platforms by
-@url{http://hydra.gnu.org/jobset/gnu/master, our continuous integration
-system}.
+@url{@value{SUBSTITUTE-SERVER}, our continuous integration system}.
 
 @cindex substituter
 Users can obtain the new package definition simply by running
@@ -893,7 +892,7 @@ changes).  This branch is intended to be merged in @code{master} every
 2.5 months or so.
 @end table
 
-All these branches are @uref{https://hydra.gnu.org/project/gnu,
+All these branches are @uref{@value{SUBSTITUTE-SERVER},
 tracked by our build farm} and merged into @code{master} once
 everything has been successfully built.  This allows us to fix issues
 before they hit users, and to reduce the window during which pre-built