[bug#35936] [PATCH] README: add Guix System configure hints

[Robert Vollmert]

* README: Mention default 'localstatedir' and that 'configure'
needs to be re-run.
---
 README | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/README b/README
index 296df41516..4d459c276d 100644
--- a/README
+++ b/README
@@ -65,6 +65,9 @@ To do so:
     value of the currently installed Guix (failing to do that would lead the
     new Guix to consider the store to be empty!).
 
+    On Guix System, this is '/var' by default. Note that you will need to
+    re-run the 'configure' script after updating Guix System.
+
   - Run "make", "make check", and "make install".
 
 * How It Works
-- 
2.20.1 (Apple Git-117)