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-rw-r--r--gnu/system/vm.scm5
1 files changed, 4 insertions, 1 deletions
diff --git a/gnu/system/vm.scm b/gnu/system/vm.scm
index b671c74ab8..55cddb1a4b 100644
--- a/gnu/system/vm.scm
+++ b/gnu/system/vm.scm
@@ -526,7 +526,10 @@ should set REGISTER-CLOSURES? to #f."
                  #$os-drv
                  #:compressor '(#+(file-append gzip "/bin/gzip") "-9n")
                  #:creation-time (make-time time-utc 0 1)
-                 #:transformations `((,root-directory -> ""))))))))
+                 #:transformations `((,root-directory -> "")))
+
+                ;; Make sure the tarball is fully written before rebooting.
+                (sync))))))
     (expression->derivation-in-linux-vm
      name build
      #:make-disk-image? #f