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-rw-r--r--doc/guix.texi3
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index 868f1959e8..53c133804d 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -2375,7 +2375,8 @@ The installation image described above was built using the @command{guix
 system} command, specifically:
 
 @example
-guix system disk-image gnu/system/install.scm
+guix system disk-image --file-system-type=iso9660 \
+  gnu/system/install.scm
 @end example
 
 Have a look at @file{gnu/system/install.scm} in the source tree,