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diff --git a/doc/guix.texi b/doc/guix.texi
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@@ -1016,14 +1016,21 @@ C++11 standard.
@end itemize
@cindex state directory
+@cindex localstatedir
+@cindex system configuration directory
+@cindex sysconfdir
When configuring Guix on a system that already has a Guix installation,
be sure to specify the same state directory as the existing installation
using the @option{--localstatedir} option of the @command{configure}
script (@pxref{Directory Variables, @code{localstatedir},, standards,
-GNU Coding Standards}). Usually, this @var{localstatedir} option is
-set to the value @file{/var}. The @command{configure} script protects
+GNU Coding Standards}). Usually, this @var{localstatedir} option is set
+to the value @file{/var}. The @command{configure} script protects
against unintended misconfiguration of @var{localstatedir} so you do not
-inadvertently corrupt your store (@pxref{The Store}).
+inadvertently corrupt your store (@pxref{The Store}). The configuration
+directory should also be configured by setting the @option{--sysconfdir}
+option to the @file{/etc} value, which is the location used by Guix to
+store for example the access control list of authorized machines and the
+definition of offload machines.
@node Running the Test Suite
@section Running the Test Suite