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-rw-r--r--guix/store/deduplication.scm5
1 files changed, 4 insertions, 1 deletions
diff --git a/guix/store/deduplication.scm b/guix/store/deduplication.scm
index 9953675319..acb6ffcc4a 100644
--- a/guix/store/deduplication.scm
+++ b/guix/store/deduplication.scm
@@ -262,7 +262,10 @@ down the road."
       (deduplicate file (dump-and-compute-hash) #:store store)
       (call-with-output-file file
         (lambda (output)
-          (sendfile output input size 0)))))
+          (if (file-port? input)
+              (sendfile output input size 0)
+              (dump-port input output size
+                         #:buffer-size %deduplication-minimum-size))))))
 
 (define* (copy-file/deduplicate source target
                                 #:key (store (%store-directory)))