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-rw-r--r--gnu/system/mapped-devices.scm4
1 files changed, 4 insertions, 0 deletions
diff --git a/gnu/system/mapped-devices.scm b/gnu/system/mapped-devices.scm
index aec49322e7..384b1aaf7d 100644
--- a/gnu/system/mapped-devices.scm
+++ b/gnu/system/mapped-devices.scm
@@ -137,6 +137,10 @@ DEVICE must be a \"/dev\" file name."
           ;; LINUX-MODULES is file names without '.ko', so normalize them.
           (provided (map file-name->module-name linux-modules)))
       (unless (every (cut member <> provided) modules)
+        ;; Note: What we suggest here is a list of module names (e.g.,
+        ;; "usb_storage"), not file names (e.g., "usb-storage.ko").  This is
+        ;; OK because we have machinery that accepts both the hyphen and the
+        ;; underscore version.
         (raise (condition
                 (&message
                  (message (format #f (G_ "you may need these modules \