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-rw-r--r--guix/progress.scm3
1 files changed, 2 insertions, 1 deletions
diff --git a/guix/progress.scm b/guix/progress.scm
index 9da667a027..7a25f11bd4 100644
--- a/guix/progress.scm
+++ b/guix/progress.scm
@@ -2,6 +2,7 @@
;;; Copyright © 2017 Sou Bunnbu <iyzsong@gmail.com>
;;; Copyright © 2015 Steve Sprang <scs@stevesprang.com>
;;; Copyright © 2017, 2018 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2018 Clément Lassieur <clement@lassieur.org>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -197,7 +198,7 @@ throughput."
(define elapsed
(duration->seconds
(time-difference (current-time time-monotonic) start-time)))
- (if (number? size)
+ (if (and (number? size) (not (zero? size)))
(let* ((% (* 100.0 (/ transferred size)))
(throughput (/ transferred elapsed))
(left (format #f " ~a ~a" file