diff --git a/gnu/system/image.scm b/gnu/system/image.scm
index 4075a26552..81152f0fc4 100644
--- a/gnu/system/image.scm
+++ b/gnu/system/image.scm
@@ -414,6 +414,7 @@ (define (partition->config partition)
                 out-image))
              (convert-disk-image out-image '#$format #$output)))))
     (computed-file name builder
+                   #:local-build? #f              ;too I/O-intensive
                    #:options `(#:substitutable? ,substitutable?))))