From bf642747f460160bb6db4031d7190834949f5abb Mon Sep 17 00:00:00 2001
From: Christopher Baines <christopher.baines@digital.cabinet-office.gov.uk>
Date: Sun, 1 Jul 2018 18:53:38 +0100
Subject: Work around a issue in grootfs when unpacking tar archives

---
 guix/docker.scm | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/guix/docker.scm b/guix/docker.scm
index c6e9c6fee5..0f917f08bc 100644
--- a/guix/docker.scm
+++ b/guix/docker.scm
@@ -197,9 +197,11 @@ SRFI-19 time-utc object, as the creation time in metadata."
           ;; Initialize /var/guix, assuming PREFIX points to a profile.
           (install-database-and-gc-roots "." database prefix))
 
+        (mkdir-p "gnu/store")
         (apply invoke "tar" "-cf" "layer.tar"
                `(,@transformation-options
                  ,@%tar-determinism-options
+                 "gnu"
                  ,@paths
                  ,@(if database '("var") '())
                  ,@(map symlink-source symlinks)))
-- 
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